iankelling.org Git - distro-setup/blob - mail-setup

   1 #!/bin/bash
   2 # * intro
   3 # Copyright (C) 2019 Ian Kelling
   4 # SPDX-License-Identifier: AGPL-3.0-or-later
   5
   6 # Things I tend to forget. on MAIL_HOST, daemon runs with /etc/exim4/my.conf,
   7 # which gets generated from update-exim4.conf -d /etc/myexim4
   8 # which has log path
   9 # log_file_path = /var/log/exim4/my%s
  10 #
  11 # so, normal mainlog is non-daemon, which delivers to the daemon.
  12
  13
  14 # shellcheck disable=SC2254 # makes for a lot of unneeded quotes
  15
  16
  17 # perusing through /el/mainlog without test messages:
  18 # &!testignore|jtuttle|
  19 #
  20 #&! testignore|jtuttle|eximbackup|/usr/sbin/exim4 -bpu
  21
  22 # todo: check new macro DKIM_TIMESTAMPS
  23
  24 # todo: check if REMOTE_SMTP_INTERFACE or REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE can simplify my or fsfs config
  25
  26 # todo: max line length macro changed in t11. look into it
  27 # todo: check that all macros we use are still valid in t11
  28
  29 # todo: setup an alert for bouncing test emails.
  30
  31 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  32 # think about making bounces go from the original address.
  33
  34 # todo: add a prometheus alert for dovecot.
  35
  36 # todo: handle errors like this:
  37 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  38 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  39 #eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago
  40 #Debian-+  1954     1  0 36231 11560   4 Apr02 ?        00:40:25 /usr/sbin/exim4 -bd -q30m
  41 #Debian-+ 23058  1954  0 36821 10564   0 20:38 ?        00:00:00 /usr/sbin/exim4 -bd -q30m
  42
  43 #  todo: harden dovecot. need to do some research. one way is for it to only listen on a wireguard vpn interface, so only clients that are on the vpn can access it.
  44 #  todo: consider hardening cups listening on 0.0.0.0
  45 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  46
  47 # todo:  hosts should only allow external mail that is authed and
  48 # destined for backup route. it is a minor issue since traffic is
  49 # limited to the wghole network.
  50
  51 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  52 # instead of a simple rejection like it should.
  53
  54 # todo: run mailping test after running, or otherwise
  55 # clear out terminal alert
  56
  57 # todo: disable postgrey
  58
  59 # todo: in testforward-check, we should also look
  60
  61 # todo: test that bounces dont help create valid mailtest-check
  62
  63 # todo: move mail stuff in distro-end into this file
  64
  65 # todo: consider rotating dkim & publishing key so every past email I sent
  66 # isnt necessarily signed
  67
  68 # todo: consider how to get clamav out of Debian-exim group
  69 # so it cant read/write the whole mail spool, for better
  70 # security.
  71
  72 # todo: create a cronjob to update or warn on expiring dnssec keys
  73
  74 # todo: we should test failed mail daily or so
  75 # failed cronjob, failed sysd-log-once,
  76 # a local bounce from a cronjob, a local bounce
  77 # to a bad remote address, perhaps a local failure
  78 # when the sending daemon is down.
  79 # And send an alert email if no alerts have been sent
  80 # in 2 or 3 days or something. todo, test cron mail on li.
  81
  82 # todo: look at mailinabox extra dns records, note these changelogs:
  83 # - An MTA-STS policy for incoming mail is now published (in DNS and over HTTPS) when the primary hostname and email address domain both have a signed TLS certificate installed, allowing senders to know that an encrypted connection should be enforced.
  84 # - The per-IP connection limit to the IMAP server has been doubled to allow more devices to connect at once, especially with multiple users behind a NAT.
  85 #
  86
  87 # todo: mailtest-check failure on remote hosts is not going to alert me.
  88 # sort that out.
  89 # todo: test mail failure as well as success.
  90 #
  91 # todo: validate that mailtest-check is doing dnsbl checks.
  92
  93 # background: I want to run exim in a network namespace so it can send
  94 # and receive through a vpn. This is needed so it can do ipv6, because
  95 # outside the namespace if we dont have ipv6, to send ipv6 through the
  96 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  97 # long time, it was fine, but it causes various pains, like increased
  98 # latency, increased recaptcha because my ip is from a data center, just
  99 # various issues I dont want on all the time. The problem with the
 100 # namespace is that all kinds of programs want to invoke exim, but they
 101 # wont be in the namespace. I could replace exim with a wrapper that
 102 # jumps into the namespace, i tried that, it works fine.  One remaining
 103 # problem was that I would have needed to hook into exim upgrades to
 104 # move exim and replace it with my wrapper script. Also, my script to
 105 # join the namespace is not super reliable because it uses a pgrep.
 106 # Instead, I should have created a systemd service for a process that
 107 # will never die and just writes its pid somewhere convenient.
 108 # That implementation
 109 # is below here:
 110 #
 111 # sudoers:
 112 # user ALL=(ALL) /usr/sbin/exim4
 113 #
 114 # move exim4 to eximian, use this script for exim4:
 115 #
 116 # #!/bin/bash
 117 # if ip a show veth1-mail &>/dev/null; then
 118 #   /usr/sbin/eximian "$@"
 119 #   exit
 120 # fi
 121 # dosudo=false
 122 # if [[ $USER && $USER != root ]]; then
 123 #   dosudo=true
 124 # fi
 125 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 126 # if $dosudo; then
 127 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 128 # else
 129 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 130 # fi
 131 # ## end script
 132 #
 133 # an alternate solution: there is a small setguid program for
 134 # network namespaces in my bookmarks.
 135 #
 136 # However, the solution I went with is: have 2 exim
 137 # configs. A nonstandard location for the daemon that runs
 138 # in the namespace. For all other invocations, it uses
 139 # the default config location, which is altered to be
 140 # in a smarthost config which sends mail to the deaemon.
 141 #
 142 # I have a bash function, enn to invoke exim like the daemon is running.
 143 # and mailbash to just enter its network namespace.
 144
 145 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 146
 147 shopt -s nullglob
 148
 149 if [[ -s /usr/local/lib/err ]]; then
 150   source /usr/local/lib/err
 151 elif [[ -s /a/bin/errhandle/err ]]; then
 152   source /a/bin/errhandle/err
 153 else
 154   echo "no err tracing script found"
 155   exit 1
 156 fi
 157 source /a/bin/distro-functions/src/identify-distros
 158 source /a/bin/distro-functions/src/package-manager-abstractions
 159
 160 # has nextcloud_admin_pass in it
 161 f=/p/c/machine_specific/$HOSTNAME/mail
 162 if [[ -e $f ]]; then
 163   # shellcheck source=/p/c/machine_specific/bk/mail
 164   source $f
 165 fi
 166
 167
 168 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 169
 170 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 171 u=$(id -nu 1000)
 172
 173
 174 usage() {
 175   cat <<EOF
 176 Usage: ${0##*/} anything_here_to_debug
 177 Setup exim4 & dovecot & related things
 178
 179 -h|--help  Print help and exit.
 180 EOF
 181   exit $1
 182 }
 183
 184 # debug output if we pass any arg
 185 if (( $# )); then
 186   set -x
 187 fi
 188
 189
 190 ####### instructions for icedove #####
 191 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 192 # then click advanced so it accepts it.
 193 # we could also just use 127.0.0.1 with no ssl
 194 #
 195 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 196 # background: dovecot does not yet have ocsp stapling support
 197 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 198 #
 199 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 200 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 201 # fetching mail settings: folder poll frequency 10 minutes.
 202 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 203 #######
 204
 205
 206 # * perstent password instructions
 207 # Note: for cert cron, we need to manually run first to accept known_hosts
 208
 209 # # exim passwords:
 210 # # for hosts which have all private files I just use the same user
 211 # # for other hosts, each one get\'s their own password.
 212 # # for generating secure pass, and storing for server too:
 213 # f=$(mktemp)
 214 # host=tp
 215 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 216 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 217 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 218 # #reference: exim4_passwd_client(5)
 219 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 220 # mkdir -p $dir
 221 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 222 # # then run this script
 223
 224 # # dovecot password, i just need 1 as I\'m the only user
 225 # mkdir /p/c/filesystem/etc/dovecot
 226 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 227
 228 ####### end perstent password instructions ######
 229
 230
 231 # * dkim dns
 232 # # Remove 1 level of comments in this section, set the domain var
 233 # # for the domain you are setting up, then run this and copy dns settings
 234 # # into dns.
 235 # domain=iankelling.org
 236 # c /p/c/filesystem/etc/exim4
 237 # # this has several bugs addressed in comments, but it was helpful
 238 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 239
 240 # openssl genrsa -out $domain-private.pem 2048
 241 # # Then, to get the public key strings to put in bind:
 242
 243 # # selector is needed for having multiple keys for one domain.
 244 # # I dun do that, so just use a static one: li
 245 # # Debadmin page does not have v=, fastmail does, and this
 246 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 247 # # https://www.ietf.org/rfc/rfc6376.txt
 248 # # Join and print all but first and last line.
 249 # # last line: swap hold & pattern, remove newlines, print.
 250 # # lines 2+: append to hold space
 251 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 252 # cat <<EOF
 253 # a._domainkey.$domain  TXT     (
 254 # "v=DKIM1\059 k=rsa\059 p=$(openssl rsa -in $domain-private.pem -pubout |&sed -rn '${x;s/\n//g;s/^(.*)(.{240}$)/\1"\n"\2/p};3,$H')" )
 255 # EOF
 256 # # sed explanation: skip the first few lines, then put them into the hold space, then
 257 # # on the last line, back to the patern space, remove the newlines, then add a newline
 258 # # at the last char - 240, because bind txt records need strings <=255 chars,
 259 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 260 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 261
 262 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 263
 264 # * dmarc dns
 265
 266 # # 2017-02 dmarc policies:
 267 # # host -t txt _dmarc.gmail.com
 268 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 269 # # there were articles claiming gmail would be  changing
 270 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 271 # # expected to cause problems
 272 # # with a few old mailing lists, copying theirs for now.
 273 #
 274 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 275
 276 # * other dns
 277
 278 # # 2017-02 spf policies:
 279 # # host -t txt lists.fedoraproject.org
 280 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 281 # # i include fastmail\'s settings, per their instructions,
 282 # # and follow their policy. In mail in a box, or similar instructions,
 283 # # I\'ve seen recommended to not use a restrictive policy.
 284
 285 # # to check if dns has updated, you do
 286 # host -a mesmtp._domainkey.$domain
 287
 288 # # mx records,
 289 # # setting it to iankelling.org would work the same, but this
 290 # # is more flexible, I could change where mail.iankelling.org pointed.
 291 # cat <<'EOF'
 292 # mx records, 2 records each, for * and empty domain
 293 # pri 10 mail.iankelling.org
 294 # EOF
 295
 296 # # dnssec
 297 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 298
 299 # * functions & constants
 300
 301 pre="${0##*/}:"
 302 m() { printf "$pre %s\n"  "$*"; "$@"; }
 303 e() { printf "$pre %s\n"  "$*"; }
 304 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 305
 306 reload=false
 307 # This file is so if we fail in the middle and rerun, we dont lose state
 308 if [[ -e /var/local/mail-setup-reload ]]; then
 309   reload=true
 310 fi
 311 u() { # update file. note: duplicated in brc
 312   local tmp tmpdir dest="$1"
 313   local base="${dest##*/}"
 314   local dir="${dest%/*}"
 315   if [[ $dir != "$base" ]]; then
 316     # dest has a directory component
 317     mkdir -p "$dir"
 318   fi
 319   ur=false # u result
 320   tmpdir=$(mktemp -d)
 321   cat >$tmpdir/"$base"
 322   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 323   if [[ $tmp ]]; then
 324     printf "%s\n" "$tmp"
 325     ur=true
 326     if [[ $dest == /etc/systemd/system/* ]]; then
 327       touch /var/local/mail-setup-reload
 328       reload=true
 329     fi
 330   fi
 331   rm -rf $tmpdir
 332 }
 333 setini() {
 334   key="$1" value="$2" section="$3"
 335   file="/etc/radicale/config"
 336   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 337 }
 338 soff () {
 339   for service; do
 340     # ignore services that dont exist
 341     if systemctl cat $service &>/dev/null; then
 342       m systemctl disable --now $service
 343     fi
 344   done
 345 }
 346 sre() {
 347   local enabled
 348   for service; do
 349     m systemctl restart $service
 350     # Optimization for exim,
 351     # is-enabled: 0m0.015s
 352     # enable: 0m0.748s
 353     # It is related to this message:
 354     # exim4.service is not a native service, redirecting to systemd-sysv-install.
 355     # Executing: /lib/systemd/systemd-sysv-install enable exim4
 356     enabled=$(systemctl is-enabled $service 2>/dev/null ||:)
 357     if [[ $enabled != enabled ]]; then
 358       m systemctl enable $service
 359     fi
 360   done
 361 }
 362 mailhost() {
 363   [[ $HOSTNAME == "$MAIL_HOST" ]]
 364 }
 365 e() { printf "%s\n" "$*"; }
 366 reifactive() {
 367   for service; do
 368     if systemctl is-active $service >/dev/null; then
 369       m systemctl restart $service
 370     fi
 371   done
 372 }
 373 stopifactive() {
 374   for service; do
 375     if systemctl is-active $service >/dev/null; then
 376       m systemctl stop $service
 377     fi
 378   done
 379 }
 380
 381 mxhost=mx.iankelling.org
 382 mxport=587
 383
 384 # old setup. left as comment for example
 385 # mxhost=mail.messagingengine.com
 386 # mxport=587
 387 # forward=ian@iankelling.org
 388
 389 smarthost="$mxhost::$mxport"
 390 uhome=$(eval echo ~$u)
 391
 392 # Somehow on one machine, a file got written with 664 perms.
 393 # just being defensive here.
 394 umask 0022
 395
 396 source /a/bin/bash_unpublished/source-state
 397 if [[ ! $MAIL_HOST ]]; then
 398   err "\$MAIL_HOST not set"
 399 fi
 400
 401 bhost_t=false
 402 case $HOSTNAME in
 403   $MAIL_HOST) : ;;
 404   kd|frodo|x2|x3|kw|sy|bo)
 405     bhost_t=true
 406     ;;
 407 esac
 408
 409
 410 # * Install universal packages
 411
 412
 413 # installs epanicclean iptables-exim ip6tables-exim
 414 /a/bin/ds/install-my-scripts
 415
 416 if [[ $(debian-codename-compat) == bionic ]]; then
 417   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 418 Package: spamassassin sa-compile spamc
 419 Pin: release n=focal,o=Ubuntu
 420 Pin-Priority: 500
 421 EOF
 422 fi
 423
 424 # light version of exim does not have sasl auth support.
 425 # note: for bitfolk hosts, unbound has important config with conflink.
 426 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 427
 428 # note: pyzor debian readme says you need to run some initialization command
 429 # but its outdated.
 430 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 431 case $HOSTNAME in
 432   je) : ;;
 433   # not included due to using wireguard: openvpn
 434   *) pi wget git unzip iptables ;;
 435 esac
 436 # bad packages that sometimes get automatically installed
 437 pu openresolv resolvconf
 438
 439 soff openvpn
 440
 441
 442 if [[ $(debian-codename) == etiona ]]; then
 443   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 444   # so running iptables as part of openvpn startup wont work. This should do it.
 445   pi iptables-persistent
 446   cat >/etc/iptables/rules.v6 <<'EOF'
 447 *mangle
 448 COMMIT
 449 *nat
 450 COMMIT
 451 EOF
 452   # load it now.
 453   m ip6tables -S >/dev/null
 454 fi
 455
 456 # our nostart pi fails to avoid enabling
 457
 458
 459 # * Mail clean cronjob
 460
 461 u /etc/systemd/system/mailclean.timer <<'EOF'
 462 [Unit]
 463 Description=Run mailclean daily
 464
 465 [Timer]
 466 OnCalendar=monthly
 467
 468 [Install]
 469 WantedBy=timers.target
 470 EOF
 471
 472 u /etc/systemd/system/mailclean.service <<EOF
 473 [Unit]
 474 Description=Delete and archive old mail files
 475 After=multi-user.target
 476
 477 [Service]
 478 User=$u
 479 Type=oneshot
 480 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 481 EOF
 482
 483 # * postgrey
 484
 485
 486 u /etc/default/postgrey <<'EOF'
 487 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 488 EOF
 489
 490 # * clamav
 491
 492 m usermod -a -G Debian-exim clamav
 493
 494 u /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 495 [Service]
 496 ExecStartPre=-/bin/mkdir -p /var/run/clamav
 497 ExecStartPre=/bin/chown clamav /var/run/clamav
 498 EOF
 499
 500 # * mail vpn config
 501
 502 # old.
 503 #vpnser=mailvpn.service
 504 # note: this hangs if it cant resolv the endpoint. we
 505 # want it to just retry in the background. i just use a static ip instead.
 506 #
 507 # Note: at least on t10, on reboot, the service fails to come up according to systemd, but
 508 # in reality it is up and working, then it tries to restart infinitely, and fails
 509 # because it detects that the interface exists.
 510 #
 511 # failing output:
 512 #
 513 # Aug 02 21:59:27 sy wg-quick[2092]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 514 # Aug 02 21:59:27 sy wg-quick[2248]: [#] iptables-restore -n
 515 # Aug 02 21:59:27 sy wg-quick[2249]: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
 516 # Aug 02 21:59:27 sy wg-quick[2259]: [#] iptables-restore -n
 517 # Aug 02 21:59:27 sy wg-quick[2260]: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
 518 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=4/NOPERMISSION
 519
 520
 521 # successful output.
 522 # Aug 03 14:12:47 sy wg-quick[711336]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 523 # Aug 03 14:12:47 sy wg-quick[711384]: [#] iptables-restore -n
 524 # Aug 03 14:12:47 sy wg-quick[711336]: [#] ping -w10 -c1 10.8.0.1 ||:
 525 # Aug 03 14:12:47 sy wg-quick[711389]: PING 10.8.0.1 (10.8.0.1) 56(84) bytes of data.
 526 # Aug 03 14:12:47 sy wg-quick[711389]: 64 bytes from 10.8.0.1: icmp_seq=1 ttl=64 time=73.0 ms
 527 # Aug 03 14:12:47 sy wg-quick[711389]: --- 10.8.0.1 ping statistics ---
 528 # Aug 03 14:12:47 sy wg-quick[711389]: 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 529 # Aug 03 14:12:47 sy wg-quick[711389]: rtt min/avg/max/mdev = 72.993/72.993/72.993/0.000 ms
 530 # Aug 03 14:12:47 sy systemd[1]: Finished WireGuard via wg-quick(8) for wgmail.
 531 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 532 # Aug 02 21:59:27 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 533 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Scheduled restart job, restart counter is at 1.
 534 # Aug 02 21:59:47 sy systemd[1]: Stopped WireGuard via wg-quick(8) for wgmail.
 535 # Aug 02 21:59:47 sy systemd[1]: Starting WireGuard via wg-quick(8) for wgmail...
 536 # Aug 02 21:59:47 sy wg-quick[3424]: wg-quick: `wgmail' already exists
 537 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=1/FAILURE
 538 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 539 # Aug 02 21:59:47 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 540
 541
 542 # According to iptables -S and iptables -t nat -S,
 543 # there are no modifications to iptables rules on a succsfull run,
 544 # and
 545
 546 vpnser=wg-quick@wgmail.service
 547
 548 case $HOSTNAME in
 549   $MAIL_HOST)
 550     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 551     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 552     ;;&
 553   bk)
 554     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 555     ;;&
 556   *)
 557     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 558     if [[ -d $d ]]; then
 559       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 560     fi
 561     ;;
 562 esac
 563
 564 case $HOSTNAME in
 565   li) : ;;
 566   *)
 567     u /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 568 [Unit]
 569 Requires=mailnn.service
 570 JoinsNamespaceOf=mailnn.service
 571 BindsTo=mailnn.service
 572 StartLimitIntervalSec=0
 573
 574 [Service]
 575 PrivateNetwork=true
 576 # i dont think we need any of these, but it doesnt hurt to stay consistent
 577 BindPaths=$bindpaths
 578
 579 Restart=on-failure
 580 RestartSec=20
 581 EOF
 582     ;;
 583 esac
 584
 585
 586 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 587 u /etc/systemd/system/mailvpn.service <<EOF
 588 [Unit]
 589 Description=OpenVPN tunnel for mail
 590 After=syslog.target network-online.target mailnn.service
 591 Wants=network-online.target
 592 Documentation=man:openvpn(8)
 593 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 594 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 595 # needed to continually restatr
 596 JoinsNamespaceOf=mailnn.service
 597 BindsTo=mailnn.service
 598 StartLimitIntervalSec=0
 599
 600 [Service]
 601 Type=notify
 602 RuntimeDirectory=openvpn-client
 603 RuntimeDirectoryMode=0710
 604 WorkingDirectory=/etc/openvpn/client
 605 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 606 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 607 LimitNPROC=10
 608 # DeviceAllow=/dev/null rw
 609 # DeviceAllow=/dev/net/tun rw
 610 PrivateNetwork=true
 611 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 612 # because of
 613 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 614 # there is a workaround there, but i dont think its really worth it,
 615 # the mail server is fine with a static dns anyways.
 616 # This thread is also interesting,
 617 # https://github.com/slingamn/namespaced-openvpn/issues/7
 618 # todo: the iptables rule at the bottom could be useful to prevent
 619 # dns from leaking in my network namespaced vpn.
 620 # I also like the idea of patching systemd-resolved so it
 621 # will listen on other interfaces, but its not worth my time.
 622 BindPaths=$bindpaths
 623 Restart=always
 624 # time to sleep before restarting a service
 625 RestartSec=20
 626
 627 [Install]
 628 WantedBy=multi-user.target
 629 EOF
 630
 631 u /etc/systemd/system/mailnnroute.service <<'EOF'
 632 [Unit]
 633 Description=Network routing for mailnn
 634 After=syslog.target network-online.target mailnn.service
 635 Wants=network-online.target
 636 JoinsNamespaceOf=mailnn.service
 637 BindsTo=mailnn.service
 638 StartLimitIntervalSec=0
 639
 640 [Service]
 641 Type=simple
 642 RemainAfterExit=true
 643 PrivateNetwork=true
 644 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 645 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 646 Restart=always
 647 RestartSec=20
 648
 649
 650 [Install]
 651 WantedBy=multi-user.target
 652 EOF
 653
 654 #
 655 u /etc/systemd/system/mailnn.service <<'EOF'
 656 [Unit]
 657 Description=Network Namespace for mail vpn service that will live forever and cant fail
 658 After=syslog.target network-online.target
 659 Wants=network-online.target
 660
 661 [Service]
 662 Type=simple
 663 PrivateNetwork=true
 664 ExecStart=/bin/sleep infinity
 665
 666 [Install]
 667 WantedBy=multi-user.target
 668 EOF
 669
 670 u /etc/systemd/system/mailbindwatchdog.service <<EOF
 671 [Unit]
 672 Description=Watchdog to restart services relying on systemd-resolved dir
 673 After=syslog.target network-online.target
 674 Wants=network-online.target
 675 BindsTo=mailnn.service
 676
 677 [Service]
 678 Type=simple
 679 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 680 Restart=always
 681 # time to sleep before restarting a service
 682 RestartSec=10
 683
 684 [Install]
 685 WantedBy=multi-user.target
 686 EOF
 687
 688
 689
 690 # old service name
 691 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 692
 693 # We use a local unbound because systemd-resolved wont accept our
 694 # request, it will only listen to 127.0.0.53 in the main network
 695 # namespace, and rejected feature requests to change that (although I
 696 # could change the code and recompile), but anyways, that could answer
 697 # with things specific to the lan that aren't applicable in this
 698 # namespace, and since unbound is a recursive resolver, it means we just
 699 # use our own ip against dnsbl rate limits.
 700 #
 701 # If we ever notice this change, chattr +i on it
 702 # trust-ad is used in t10+, glibc 2.31
 703
 704 u /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 705 nameserver 127.0.0.1
 706 options edns0 trust-ad
 707 EOF
 708
 709 u /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 710 nameserver 127.0.0.53
 711 options edns0 trust-ad
 712 EOF
 713
 714
 715 u /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 716 nameserver 10.173.8.1
 717 options edns0 trust-ad
 718 EOF
 719
 720 # this is just a bug fix for trisquel.
 721 f=/etc/apparmor.d/usr.sbin.unbound
 722 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 723 if ! grep -qFx "$line" $f; then
 724   badline="/usr/sbin/unbound {"
 725   if ! grep -qFx "$badline" $f; then
 726     err expected line in $f not found
 727   fi
 728   sed -i "s,^$badline$,$line," $f
 729   if systemctl is-active apparmor &>/dev/null; then
 730     m systemctl reload apparmor
 731   fi
 732 fi
 733
 734 # note: anything added to nn_progs needs corresponding rm
 735 # down below in the host switch
 736 nn_progs=(exim4)
 737 if mailhost; then
 738   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 739   # Its in the nn so remote clients can connect to it.
 740   nn_progs+=(spamassassin dovecot)
 741 fi
 742
 743 case $HOSTNAME in
 744   $MAIL_HOST)
 745     # todo, should this be after vpn service
 746     u /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 747 [Unit]
 748 After=mailnn.service
 749 JoinsNamespaceOf=mailnn.service
 750 BindsTo=mailnn.service
 751 StartLimitIntervalSec=0
 752
 753 [Service]
 754 PrivateNetwork=true
 755 # note the nsswitch bind is actually not needed for bk, but
 756 # its the same file so it does no harm.
 757 BindPaths=$bindpaths
 758
 759 Restart=always
 760 RestartSec=20
 761 EOF
 762
 763     # sooo, there are a few ways to get traffic from the mail network
 764     # namespace to go over the wghole.
 765     #
 766     #1: unify the mail vpn and wghole
 767     # into 1 network.  this seems simple and logical, so I'm doing it.
 768     # One general downside is tying things together, if I need to mess
 769     # with one thing, it breaks the other. Oh well for now.
 770     #
 771     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 772     #
 773     # 3. We can setup the routing to happen on li, which seemed like I
 774     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 775     # wghole clients, but I think that is kind of hacky and breaks ipv4
 776     # routing within the mailvpn, it happened to work just because exim
 777     # prefers ipv6 and that was also available in the mailvpn.
 778     #
 779     # 4. Put the hole interface into the mail network namespace. This
 780     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 781     # vpn routing and establishes a direct connection.  I only use the
 782     # hole vpn for randomish things, it should be fine to join the mail
 783     # nn for that. There should be some way to fix the routing issue
 784     # by doing manual routing, but that doesn't seem like a good use of time.
 785     # relevant:
 786     # https://www.wireguard.com/netns/#
 787     #
 788     # for wireguard debugging
 789     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 790     # dmesg -w
 791
 792     ;;&
 793   $MAIL_HOST|bk)
 794     for unit in ${nn_progs[@]}; do
 795       u /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 796 [Unit]
 797
 798 # Wants appears better than requires because with requires,
 799 # if the vpnser fails to start, this service won't get run at
 800 # all, even if the vpnser starts on an automatic restart.
 801
 802 Wants=$vpnser
 803 After=network.target mailnn.service $vpnser
 804 JoinsNamespaceOf=mailnn.service
 805 BindsTo=mailnn.service
 806 StartLimitIntervalSec=0
 807
 808 [Service]
 809 PrivateNetwork=true
 810 # note the nsswitch bind is actually not needed for bk, but
 811 # its the same file so it does no harm.
 812 BindPaths=$bindpaths
 813
 814 Restart=always
 815 RestartSec=20
 816 EOF
 817     done
 818     ;;
 819   *)
 820     for unit in exim4 spamassassin dovecot unbound; do
 821       f=/etc/systemd/system/$unit.service.d/nn.conf
 822       if [[ -s $f ]]; then
 823         rm -fv $f
 824         reload=true
 825       fi
 826     done
 827     ;;
 828 esac
 829
 830 # * wghole (another mail vpn)
 831
 832 if $bhost_t; then
 833   u /etc/systemd/system/wg-quick@wghole.service.d/override.conf <<'EOF'
 834 [Unit]
 835 StartLimitIntervalSec=0
 836
 837 [Service]
 838 Restart=on-failure
 839 RestartSec=20
 840 EOF
 841 fi
 842
 843 # * spamassassin config
 844 u /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 845 # see exim spec
 846 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 847 EOF
 848 if $ur; then
 849   m sysctl -p
 850 fi
 851
 852 u /etc/spamassassin/mylocal.cf <<'EOF'
 853 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 854
 855 # /usr/share/doc/exim4-base/README.Debian.gz:
 856 #   SpamAssassin's default report should not be used in a add_header
 857 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 858 #   warning "BAD HEADER SECTION, Improper folded header field made up
 859 #   entirely of whitespace".) This is a safe, terse alternative:
 860 clear_report_template
 861 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 862 uridnsbl_skip_domain iankelling.org
 863 uridnsbl_skip_domain amnimal.ninja
 864 uridnsbl_skip_domain expertpathologyreview.com
 865 uridnsbl_skip_domain zroe.org
 866 EOF
 867
 868 # 2020-10-19 remove old file. remove this when all hosts updated
 869 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 870
 871 u /etc/default/spamassassin <<'EOF'
 872 # defaults plus debugging flags for an issue im having
 873 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 874 PIDFILE="/var/run/spamd.pid"
 875 # my additions
 876 NICE="--nicelevel 15"
 877 CRON=1
 878 EOF
 879 #####   end spamassassin config
 880
 881
 882 # * Update mail cert
 883
 884
 885 ## needed only for openvpn mail vpn.
 886 # if [[ -e /p/c/filesystem ]]; then
 887 #   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 888 #   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 889 #   # after my internet was down for a bit:
 890 #   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 891 #   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 892 # fi
 893
 894 # With openvpn, I didn't get around to persisting the openvpn
 895 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 896 # manually get the cert. However, we aren't using openvpn anymore, so it
 897 # is commented out.
 898 #
 899 # case $HOSTNAME in
 900 #   bk)
 901 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 902 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 903 #       exit 1
 904 #     fi
 905 #     ;;
 906 # esac
 907
 908 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 909
 910 u /etc/systemd/system/mailcert.service <<'EOF'
 911 [Unit]
 912 Description=Mail cert rsync
 913 After=multi-user.target
 914
 915 [Service]
 916 Type=oneshot
 917 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 918 EOF
 919 u /etc/systemd/system/mailcert.timer <<'EOF'
 920 [Unit]
 921 Description=Run mail-cert once a day
 922
 923 [Timer]
 924 OnCalendar=daily
 925
 926 [Install]
 927 WantedBy=timers.target
 928 EOF
 929
 930
 931 wghost=${HOSTNAME}wg.b8.nz
 932 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 933   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 934           certonly --manual --preferred-challenges=dns \
 935           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 936           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 937           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 938 fi
 939
 940 # * fail2ban
 941
 942 # todo: test that these configs actually work, eg run
 943 # s iptables-exim -S
 944 # and see someone is banned.
 945
 946 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 947     /etc/fail2ban/action.d/iptables-multiport.conf| u /etc/fail2ban/action.d/iptables-exim.conf
 948 u /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 949 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 950
 951 # Fail2Ban configuration file
 952 #
 953 # Author: Daniel Black
 954 #
 955 # This is a included configuration file and includes the definitions for the iptables
 956 # used in all iptables based actions by default.
 957 #
 958 # The user can override the defaults in iptables-common.local
 959 #
 960 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 961 #       made config file IPv6 capable (see new section Init?family=inet6)
 962
 963 [INCLUDES]
 964
 965 after = iptables-blocktype.local
 966         iptables-common.local
 967 # iptables-blocktype.local is obsolete
 968
 969 [Definition]
 970
 971 # Option:  actionflush
 972 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 973 # Values:  CMD
 974 #
 975 actionflush = <iptables> -F f2b-<name>
 976
 977
 978 [Init]
 979
 980 # Option:  chain
 981 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 982 #          added
 983 # Values:  STRING  Default: INPUT
 984 chain = INPUT
 985
 986 # Default name of the chain
 987 #
 988 name = default
 989
 990 # Option:  port
 991 # Notes.:  specifies port to monitor
 992 # Values:  [ NUM | STRING ]  Default:
 993 #
 994 port = ssh
 995
 996 # Option:  protocol
 997 # Notes.:  internally used by config reader for interpolations.
 998 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 999 #
1000 protocol = tcp
1001
1002 # Option:  blocktype
1003 # Note:    This is what the action does with rules. This can be any jump target
1004 #          as per the iptables man page (section 8). Common values are DROP
1005 #          REJECT, REJECT --reject-with icmp-port-unreachable
1006 # Values:  STRING
1007 blocktype = REJECT --reject-with icmp-port-unreachable
1008
1009 # Option:  returntype
1010 # Note:    This is the default rule on "actionstart". This should be RETURN
1011 #          in all (blocking) actions, except REJECT in allowing actions.
1012 # Values:  STRING
1013 returntype = RETURN
1014
1015 # Option:  lockingopt
1016 # Notes.:  Option was introduced to iptables to prevent multiple instances from
1017 #          running concurrently and causing irratic behavior.  -w was introduced
1018 #          in iptables 1.4.20, so might be absent on older systems
1019 #          See https://github.com/fail2ban/fail2ban/issues/1122
1020 # Values:  STRING
1021 lockingopt = -w
1022
1023 # Option:  iptables
1024 # Notes.:  Actual command to be executed, including common to all calls options
1025 # Values:  STRING
1026 iptables = /usr/local/bin/iptables-exim <lockingopt>
1027
1028
1029 [Init?family=inet6]
1030
1031 # Option:  blocktype (ipv6)
1032 # Note:    This is what the action does with rules. This can be any jump target
1033 #          as per the iptables man page (section 8). Common values are DROP
1034 #          REJECT, REJECT --reject-with icmp6-port-unreachable
1035 # Values:  STRING
1036 blocktype = REJECT --reject-with icmp6-port-unreachable
1037
1038 # Option:  iptables (ipv6)
1039 # Notes.:  Actual command to be executed, including common to all calls options
1040 # Values:  STRING
1041 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
1042 EOF
1043
1044 u /etc/fail2ban/jail.d/exim.local <<'EOF'
1045 [exim]
1046 enabled  = true
1047 port     = 25,587
1048 filter   = exim
1049 banaction = iptables-exim
1050
1051 # 209.51.188.13 = mail.fsf.org
1052 # 2001:470:142::13 = mail.fsf.org
1053 # 209.51.188.92 = eggs.gnu.org
1054 # 2001:470:142:3::10 = eggs.gnu.org
1055 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
1056 # 10.173.8.1 = non-nn net
1057 ignoreip = 209.51.188.13 2001:470:142::13 209.51.188.92 2001:470:142:3::10 72.14.176.105 2600:3c00:e000:280::2 10.173.8.1
1058 EOF
1059 if $ur; then
1060   m systemctl restart fail2ban
1061 fi
1062
1063 # * common exim4 config
1064
1065
1066 ## old, not using forward files anymore
1067 rm -fv $uhome/.forward /root/.forward
1068
1069
1070 # Make all system users be aliases. preventative
1071 # prevents things like cron mail for user without alias
1072 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
1073   if [[ ! $user ]]; then
1074     continue
1075   fi
1076   if ! grep -q "^$user:" /etc/aliases; then
1077     echo "$user: root" |m tee -a /etc/aliases
1078   fi
1079 done
1080
1081
1082 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
1083   case $HOSTNAME in
1084     $MAIL_HOST)
1085       sed -i "/^user:/d" /etc/aliases
1086       ;;
1087     *)
1088       if ! grep -q "^$user:" /etc/aliases; then
1089         echo "$user: root" |m tee -a /etc/aliases
1090       fi
1091       ;;
1092   esac
1093 done
1094
1095
1096 . /a/bin/bash_unpublished/priv-mail-setup
1097
1098
1099 m gpasswd -a iank adm #needed for reading logs
1100
1101 ### make local bounces go to normal maildir
1102 # local mail that bounces goes to /Maildir or /root/Maildir
1103 dirs=(/m/md/bounces/{cur,tmp,new})
1104 m mkdir -p ${dirs[@]}
1105 m chown iank:iank /m /m/md
1106 m ln -sfT /m/md /m/iank
1107 m chmod 771 /m /m/md
1108 m chown -R $u:Debian-exim /m/md/bounces
1109 m chmod 775 ${dirs[@]}
1110 m usermod -a -G Debian-exim $u
1111 for d in /Maildir /root/Maildir; do
1112   if [[ ! -L $d ]]; then
1113     m rm -rf $d
1114   fi
1115   m ln -sf -T /m/md/bounces $d
1116 done
1117
1118 # dkim, client passwd file
1119 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1120 f=/p/c/filesystem/etc/exim4/passwd.client
1121 if [[ -e $f ]]; then
1122   files+=($f)
1123 fi
1124 if (( ${#files[@]} )); then
1125   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1126     ${files[@]} /etc/exim4
1127 fi
1128
1129 # By default, only 10 days of logs are kept. increase that.
1130 # And dont compress, I look back at logs too often and
1131 # dont need the annoyance of decompressing them all the time.
1132 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1133 files=(/var/log/exim4/*.gz)
1134 if (( ${#files[@]} )); then
1135   gunzip ${files[@]}
1136 fi
1137
1138 ## disabled. not using .forward files, but this is still interesting
1139 ## for reference.
1140 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1141 # # i only need .forwards, so just doing that one.
1142 # cd /etc/exim4/conf.d/router
1143 # b=userforward_higher_priority
1144 # # replace the router name so it is unique
1145 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1146 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1147
1148 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1149
1150 # alerts is basically the postmaster address
1151 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1152 \$a root: alerts@iankelling.org
1153 /^root:/d
1154 EOF
1155
1156 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1157 ncsoft@zroe.org graceq2323@gmail.com hE
1158 EOF
1159
1160 # old name
1161 rm -fv /etc/exim4/conf.d/retry/37_retry
1162
1163 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1164 # Retry fast for my own domains
1165 iankelling.org * F,1d,1m;F,14d,1h
1166 amnimal.ninja * F,1d,1m;F,14d,1h
1167 expertpathologyreview.com * F,1d,1m;F,14d,1h
1168 je.b8.nz * F,1d,1m;F,14d,1h
1169 zroe.org * F,1d,1m;F,14d,1h
1170 eximbackup.b8.nz * F,1d,1m;F,14d,1h
1171
1172 # The spec says the target domain will be used for temporary host errors,
1173 # but i've found that isn't correct, the hostname is required
1174 # at least sometimes.
1175 nn.b8.nz * F,1d,1m;F,14d,1h
1176 defaultnn.b8.nz * F,1d,1m;F,14d,1h
1177 mx.iankelling.org * F,1d,1m;F,14d,1h
1178 bk.b8.nz * F,1d,1m;F,14d,1h
1179 eggs.gnu.org * F,1d,1m;F,14d,1h
1180 fencepost.gnu.org * F,1d,1m;F,14d,1h
1181
1182 # afaik our retry doesnt need this, but just using everything
1183 mx.amnimal.ninja * F,1d,1m;F,14d,1h
1184 mx.expertpathologyreview.com * F,1d,1m;F,14d,1h
1185
1186
1187 mail.fsf.org * F,1d,15m;F,14d,1h
1188 EOF
1189
1190
1191 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1192
1193 # separate file so without quoted EOF for convenience
1194 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1195 # normally empty, I set this so I can set the envelope address
1196 # when doing mail redelivery to invoke filters. Also allows
1197 # me exiqgrep and stuff.
1198 MAIN_TRUSTED_GROUPS = $u
1199 EOF
1200
1201 cd /etc/exim4
1202 {
1203   for f in *-private.pem; do
1204     echo ${f%-private.pem}
1205   done
1206 } | u /etc/exim4/conf.d/my-dkim-domains
1207
1208 rm -f /etc/exim4/conf.d/transport/11_iank
1209
1210 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1211 MAIN_TLS_ENABLE = true
1212
1213 # require tls connections for all smarthosts
1214 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = ! nn.b8.nz
1215 REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS = nn.b8.nz
1216
1217 # debian exim config added this in 2016 or so?
1218 # it's part of the smtp spec, to limit lines to 998 chars
1219 # but a fair amount of legit mail does not adhere to it. I don't think
1220 # this should be default, like it says in
1221 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1222 # todo: the bug for introducing this was about headers, but
1223 # the fix maybe is for all lines? one says gmail rejects, the
1224 # other says gmail does not reject. figure out and open a new bug.
1225 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1226
1227 # more verbose logs. used to use +all, but made it less for more efficiency.
1228 MAIN_LOG_SELECTOR = -skip_delivery -tls_cipher -tls_certificate_verified +all_parents +address_rewrite +arguments +deliver_time +pid +queue_time +queue_time_overall +received_recipients +received_sender +return_path_on_delivery +sender_on_delivery +smtp_confirmation +subject
1229
1230 # Based on spec, seems like a good idea to be nice.
1231 smtp_return_error_details = true
1232
1233 # default is 10. when exim has been down for a bit, fsf mailserver
1234 # will do a big send in one connection, then exim decides to put
1235 # the messages in the queue instead of delivering them, to avoid
1236 # spawning too many delivery processes. This is the same as the
1237 # fsfs value. And the corresponding one for how many messages
1238 # to send out in 1 connection remote_max_parallel = 256
1239 smtp_accept_queue_per_connection = 500
1240
1241
1242 DKIM_CANON = relaxed
1243 DKIM_SELECTOR = li
1244
1245
1246 # The file is based on the outgoing domain-name in the from-header.
1247 # sign if key exists
1248 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1249
1250 # most of the ones that gmail seems to use.
1251 # Exim has horrible default of signing unincluded
1252 # list- headers since they got mentioned in an
1253 # rfc, but this messes up mailing lists, like gnu/debian which want to
1254 # keep your dkim signature intact but add list- headers.
1255 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1256
1257 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1258
1259 hostlist iank_trusted = <; \
1260 # veth0
1261 10.173.8.1 ; \
1262 # li li_ip6
1263 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \
1264 # li_vpn_net li_vpn_net_ip6s
1265 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \
1266 # bk bk_ip6
1267 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \
1268 # je je_ipv6
1269 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \
1270 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1271 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1272
1273
1274 # this is the default delay_warning_condition, plus matching on local_domains.
1275 # If I have some problem with my local system that causes delayed delivery,
1276 # I dont want to send warnings out to non-local domains.
1277 delay_warning_condition = ${if or {\
1278   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1279   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1280   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1281   { match_domain{$domain}{+local_domains} }\
1282   } {no}{yes}}
1283
1284
1285 # enable 587 in addition to the default 25, so that
1286 # i can send mail where port 25 is firewalled by isp
1287 daemon_smtp_ports = 25 : 587 : 10025
1288 # default of 25, can get stuck when catching up on mail
1289 smtp_accept_max = 400
1290 smtp_accept_reserve = 100
1291 smtp_reserve_hosts = +iank_trusted
1292
1293 # Rules that make receiving more liberal should be on backup hosts
1294 # so that we dont reject mail accepted by MAIL_HOST
1295 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
1296 EOF
1297
1298 if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show exim4)" ge 4.94; then
1299   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1300 # In t11, we cant do the old anymore because this is tainted data used in a file lookup.
1301 # /usr/share/doc/exim4/NEWS.Debian.gz suggests to use lookups to untaint data.
1302 DKIM_DOMAIN = ${lookup {${domain:$rh_from:}}lsearch,ret=key{/etc/exim4/conf.d/my-dkim-domains}}
1303 EOF
1304 else
1305   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1306 # From comments in
1307 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1308 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1309 # There could be some circumstance when the
1310 # from: isnt our domain, but the envelope sender is
1311 # and so still want to sign, but I cant think of any case.
1312 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1313 EOF
1314 fi
1315
1316 rm -fv /etc/exim4/rcpt_local_acl # old path
1317
1318 u /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1319 # This acl already exists in rcpt, this just makes it more widespread.
1320 # See the comment there for its rationale. The reason it needs to be
1321 # more widespread is that I've turned on sender verification, but cron
1322 # emails can fail sender verification since I may be in a network that
1323 # doesn't have my local dns.
1324 accept
1325   authenticated = *
1326
1327 # i setup a local programs smtp to mail.iankelling.org, this
1328 # skips sender verification for it.
1329 accept
1330   hosts = 10.173.8.1
1331 EOF
1332
1333 rm -fv /etc/exim4/data_local_acl # old path
1334
1335 u /etc/exim4/conf.d/data_local_acl <<'EOF'
1336 # Except for the "condition =", this was
1337 # a comment in the check_data acl. The comment about this not
1338 # being suitable has been changed in newer exim versions. The only thing
1339 # related I found was to
1340 # add the condition =, cuz spamassassin has problems with big
1341 # messages and spammers don't bother with big messages,
1342 # but I've increased the size from 10k
1343 # suggested in official docs, and 100k in the wiki example because
1344 # those docs are rather old and I see a 110k spam message
1345 # pretty quickly looking through my spam folder.
1346
1347 #warn
1348   !hosts = +iank_trusted
1349   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1350
1351 warn
1352   !hosts = +iank_trusted
1353   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1354   !authenticated = plain_server:login_server
1355   condition = ${if < {$message_size}{5000K}}
1356   spam = Debian-exim:true
1357   add_header = X-Spam_score_int: $spam_score_int
1358   add_header = X-Spam_score: $spam_score
1359   add_header = X-Spam_bar: $spam_bar
1360   add_header = X-Spam_report: $spam_report
1361   add_header = X-Spam_action: $spam_action
1362
1363
1364 #accept
1365 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1366 #  dmarc_status = reject:quarantine
1367 #  add_header = Reply-to: dmarctest@iankelling.org
1368
1369 EOF
1370
1371
1372 # old file
1373 rm -fv /etc/exim4/conf.d/router/8{8,9}0_backup_copy \
1374    /etc/exim4/conf.d/router/865_backup_redir \
1375    /etc/exim4/conf.d/router/870_backup_local
1376
1377 # It is important for this to exist everywhere except in MAIL_HOST
1378 # non-nn config. Previously, just had it in the nn-config on MAIL_HOST,
1379 # but that is a problem if we change mail host and still have something
1380 # in the queue which was destined for this router, but hosts were
1381 # unreachable, the routers will be reevaluated on the next retry.
1382 u /etc/exim4/conf.d/router/170_backup_copy <<EOF
1383 ### router/900_exim4-config_local_user
1384 #################################
1385
1386 backup_copy:
1387 driver = manualroute
1388 domains = eximbackup.b8.nz
1389 transport = backup_remote
1390 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
1391 # note changes here also require change in passwd.client
1392 route_list = * eximbackup.b8.nz
1393 same_domain_copy_routing = yes
1394 errors_to = alerts@iankelling.org
1395 no_more
1396 EOF
1397
1398
1399 # exim4-config transports are the same as default except for
1400 # message_linelength_limit = 2097152
1401 #
1402 # TODO: copy the defaults into their own file, and setup a cronjob so
1403 # that if file.dpkg-dist shows up, and it is different, we get an alert.
1404
1405 u /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp_smarthost <<'EOF'
1406 ### transport/30_exim4-config_remote_smtp_smarthost
1407 #################################
1408
1409 # This transport is used for delivering messages over SMTP connections
1410 # to a smarthost. The local host tries to authenticate.
1411 # This transport is used for smarthost and satellite configurations.
1412
1413 remote_smtp_smarthost:
1414   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1415   driver = smtp
1416   message_linelength_limit = 2097152
1417   multi_domain
1418   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1419         {\
1420         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1421         }\
1422         {} \
1423       }
1424 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1425   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1426 .endif
1427 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1428   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1429 .endif
1430 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1431   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1432 .endif
1433 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1434   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1435 .endif
1436 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1437   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1438 .endif
1439 .ifdef REMOTE_SMTP_RETURN_PATH
1440   return_path = REMOTE_SMTP_RETURN_PATH
1441 .endif
1442 .ifdef REMOTE_SMTP_HELO_DATA
1443   helo_data=REMOTE_SMTP_HELO_DATA
1444 .endif
1445 .ifdef TLS_DH_MIN_BITS
1446 tls_dh_min_bits = TLS_DH_MIN_BITS
1447 .endif
1448 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1449 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1450 .endif
1451 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1452 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1453 .endif
1454 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1455   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1456 .endif
1457 .ifdef REMOTE_SMTP_SMARTHOST_PROTOCOL
1458   protocol = REMOTE_SMTP_SMARTHOST_PROTOCOL
1459 .endif
1460 EOF
1461
1462 u /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp <<'EOF'
1463 ### transport/30_exim4-config_remote_smtp
1464 #################################
1465 # This transport is used for delivering messages over SMTP connections.
1466
1467 remote_smtp:
1468   debug_print = "T: remote_smtp for $local_part@$domain"
1469   driver = smtp
1470   message_linelength_limit = 2097152
1471 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1472   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1473 .endif
1474 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1475   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1476 .endif
1477 .ifdef REMOTE_SMTP_RETURN_PATH
1478   return_path = REMOTE_SMTP_RETURN_PATH
1479 .endif
1480 .ifdef REMOTE_SMTP_HELO_DATA
1481   helo_data=REMOTE_SMTP_HELO_DATA
1482 .endif
1483 .ifdef REMOTE_SMTP_INTERFACE
1484   interface = REMOTE_SMTP_INTERFACE
1485 .endif
1486 .ifdef DKIM_DOMAIN
1487 dkim_domain = DKIM_DOMAIN
1488 .endif
1489 .ifdef DKIM_IDENTITY
1490 dkim_identity = DKIM_IDENTITY
1491 .endif
1492 .ifdef DKIM_SELECTOR
1493 dkim_selector = DKIM_SELECTOR
1494 .endif
1495 .ifdef DKIM_PRIVATE_KEY
1496 dkim_private_key = DKIM_PRIVATE_KEY
1497 .endif
1498 .ifdef DKIM_CANON
1499 dkim_canon = DKIM_CANON
1500 .endif
1501 .ifdef DKIM_STRICT
1502 dkim_strict = DKIM_STRICT
1503 .endif
1504 .ifdef DKIM_SIGN_HEADERS
1505 dkim_sign_headers = DKIM_SIGN_HEADERS
1506 .endif
1507 .ifdef DKIM_TIMESTAMPS
1508 dkim_timestamps = DKIM_TIMESTAMPS
1509 .endif
1510 .ifdef TLS_DH_MIN_BITS
1511 tls_dh_min_bits = TLS_DH_MIN_BITS
1512 .endif
1513 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1514 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1515 .endif
1516 .ifdef REMOTE_SMTP_PRIVATEKEY
1517 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1518 .endif
1519 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1520   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1521 .endif
1522 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1523   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1524 .endif
1525
1526 EOF
1527
1528 u /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
1529 backup_remote:
1530   driver = smtp
1531   multi_domain
1532   message_linelength_limit = 2097152
1533   hosts_require_auth = *
1534   hosts_try_auth = *
1535   envelope_to_add
1536   # manual return path because we want it to be the envelope sender
1537   # we got not the one we are using in this smtp transport
1538   headers_add = "Return-path: $sender_address"
1539 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1540   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1541 .endif
1542 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1543   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1544 .endif
1545 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1546   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1547 .endif
1548 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1549   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1550 .endif
1551 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1552   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1553 .endif
1554 .ifdef REMOTE_SMTP_HELO_DATA
1555   helo_data=REMOTE_SMTP_HELO_DATA
1556 .endif
1557 .ifdef TLS_DH_MIN_BITS
1558 tls_dh_min_bits = TLS_DH_MIN_BITS
1559 .endif
1560 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1561 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1562 .endif
1563 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1564 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1565 .endif
1566 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1567   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1568 .endif
1569 EOF
1570
1571 u /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1572 ### router/900_exim4-config_local_user
1573 #################################
1574
1575 # This router matches local user mailboxes. If the router fails, the error
1576 # message is "Unknown user".
1577 local_user:
1578   debug_print = "R: local_user for $local_part@$domain"
1579   driver = accept
1580   domains = +local_domains
1581 # ian: default file except where mentioned.
1582 # ian: commented this. I get all local parts. for bk, an rcpt
1583 # check handles checking with dovecot, and the only router
1584 # after this is root.
1585 #  local_parts = ! root
1586   transport = LOCAL_DELIVERY
1587   cannot_route_message = Unknown user
1588 # ian: added for + addressing.
1589   local_part_suffix = +*
1590   local_part_suffix_optional
1591 EOF
1592 u /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1593 dovecot_lmtp:
1594   driver = lmtp
1595   socket = /var/run/dovecot/lmtp
1596   #maximum number of deliveries per batch, default 1
1597   batch_max = 200
1598   envelope_to_add
1599 EOF
1600
1601 u /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1602 # same as debians 30_exim4-config_remote_smtp, but
1603 # with interface added at the end.
1604
1605 remote_smtp_vpn:
1606   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1607   driver = smtp
1608   message_linelength_limit = 2097152
1609 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1610   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1611 .endif
1612 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1613   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1614 .endif
1615 .ifdef REMOTE_SMTP_RETURN_PATH
1616   return_path = REMOTE_SMTP_RETURN_PATH
1617 .endif
1618 .ifdef REMOTE_SMTP_HELO_DATA
1619   helo_data=REMOTE_SMTP_HELO_DATA
1620 .endif
1621 .ifdef DKIM_DOMAIN
1622 dkim_domain = DKIM_DOMAIN
1623 .endif
1624 .ifdef DKIM_SELECTOR
1625 dkim_selector = DKIM_SELECTOR
1626 .endif
1627 .ifdef DKIM_PRIVATE_KEY
1628 dkim_private_key = DKIM_PRIVATE_KEY
1629 .endif
1630 .ifdef DKIM_CANON
1631 dkim_canon = DKIM_CANON
1632 .endif
1633 .ifdef DKIM_STRICT
1634 dkim_strict = DKIM_STRICT
1635 .endif
1636 .ifdef DKIM_SIGN_HEADERS
1637 dkim_sign_headers = DKIM_SIGN_HEADERS
1638 .endif
1639 .ifdef TLS_DH_MIN_BITS
1640 tls_dh_min_bits = TLS_DH_MIN_BITS
1641 .endif
1642 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1643 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1644 .endif
1645 .ifdef REMOTE_SMTP_PRIVATEKEY
1646 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1647 .endif
1648 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1649   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1650 .endif
1651 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1652   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1653 .endif
1654   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1655 EOF
1656
1657 u /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1658 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1659
1660 smarthost_dkim:
1661   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1662   driver = smtp
1663   message_linelength_limit = 2097152
1664   multi_domain
1665   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1666         {\
1667         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1668         }\
1669         {} \
1670       }
1671 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1672   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1673 .endif
1674 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1675   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1676 .endif
1677 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1678   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1679 .endif
1680 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1681   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1682 .endif
1683 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1684   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1685 .endif
1686 .ifdef REMOTE_SMTP_RETURN_PATH
1687   return_path = REMOTE_SMTP_RETURN_PATH
1688 .endif
1689 .ifdef REMOTE_SMTP_HELO_DATA
1690   helo_data=REMOTE_SMTP_HELO_DATA
1691 .endif
1692 .ifdef TLS_DH_MIN_BITS
1693 tls_dh_min_bits = TLS_DH_MIN_BITS
1694 .endif
1695 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1696 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1697 .endif
1698 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1699 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1700 .endif
1701 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1702   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1703 .endif
1704 .ifdef DKIM_DOMAIN
1705 dkim_domain = DKIM_DOMAIN
1706 .endif
1707 .ifdef DKIM_SELECTOR
1708 dkim_selector = DKIM_SELECTOR
1709 .endif
1710 .ifdef DKIM_PRIVATE_KEY
1711 dkim_private_key = DKIM_PRIVATE_KEY
1712 .endif
1713 .ifdef DKIM_CANON
1714 dkim_canon = DKIM_CANON
1715 .endif
1716 .ifdef DKIM_STRICT
1717 dkim_strict = DKIM_STRICT
1718 .endif
1719 .ifdef DKIM_SIGN_HEADERS
1720 dkim_sign_headers = DKIM_SIGN_HEADERS
1721 .endif
1722 EOF
1723
1724
1725 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1726 # default stuff, i havent checked if its needed
1727 dc_minimaldns='false'
1728 CFILEMODE='644'
1729 dc_use_split_config='true'
1730 dc_mailname_in_oh='true'
1731 EOF
1732
1733
1734 # * radicale
1735 if mailhost; then
1736   if ! mountpoint /o; then
1737     echo "error /o is not a mountpoint" >&2
1738     exit 1
1739   fi
1740
1741   # davx/davdroid setup instructions at the bottom
1742
1743   # main docs:
1744   # http://radicale.org/user_documentation/
1745   # https://davdroid.bitfire.at/configuration/
1746
1747   # note on debugging: if radicale can't bind to the address,
1748   # in the log it just says "Starting Radicale". If you run
1749   # it in the foreground, it will give more info. Background
1750   # plus debug does not help.
1751   # sudo -u radicale radicale -D
1752
1753   # created password file with:
1754   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1755   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1756   # # setup chgrp www-data in ./conflink
1757
1758   pi-nostart radicale
1759   m usermod -a -G radicale iank
1760
1761   u /etc/systemd/system/radicale.service.d/override.conf <<EOF
1762 [Unit]
1763
1764 After=network.target network-online.target mailnn.service $vpnser
1765
1766 Wants=$vpnser
1767 JoinsNamespaceOf=mailnn.service
1768 StartLimitIntervalSec=0
1769
1770 [Service]
1771 PrivateNetwork=true
1772 BindPaths=$bindpaths
1773 Restart=always
1774 # time to sleep before restarting a service
1775 RestartSec=20
1776
1777 [Install]
1778 # for openvpn
1779 RequiredBy=$vpnser
1780 EOF
1781
1782
1783   # use persistent uid/gid
1784   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1785   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1786   if [[ $uid != 609 ]]; then
1787     m systemctl stop radicale ||:
1788     m usermod -u 609 radicale
1789     m groupmod -g 609 radicale
1790     m usermod -g 609 radicale
1791   fi
1792   m find /o/radicale  -xdev -exec chown -h 609 {} +
1793   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1794
1795
1796   # I moved /var/lib/radicale after it's initialization.
1797   # I did a sudo -u radicale git init in the collections subfolder
1798   # after it gets created, per the git docs.
1799   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1800
1801   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1802
1803   # more config is for li in distro-end
1804
1805   # coment in this file says this is needed for it to run on startup
1806   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1807
1808   # comments say default is 0.0.0.0:5232
1809   m setini hosts 10.8.0.4:5232 server
1810   # https://radicale.org/2.1.html
1811   m setini type http_x_remote_user auth
1812
1813
1814   # disable power management feature, set to 240 min sync interval,
1815   # so it shouldn't be bad.
1816
1817   # davx^5 from f-droid
1818   # login with url and user name
1819   # url https://cal.iankelling.org/ian
1820   # username ian
1821   # pass, see password manager for radicale
1822   #
1823   # add account dialog:
1824   #
1825   # set account name as ian@iankelling.org, per help text below the
1826   # field.
1827   #
1828   # switch to groups are per-contact categories,
1829   # per https://davdroid.bitfire.at/configuration/radicale/
1830   #
1831   #
1832   # After setting up account, I added one address book, named
1833   # ianaddr. calender was already created, named ian. checked boxes under
1834   # both. synced.
1835   #
1836   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1837   #
1838   # ignorable background info:
1839   #
1840   # opentasks uses the calendar file.
1841   #
1842   # The address book I created got a uuid as a name for the file. Note
1843   # the .props file says if it's a calendar or addressbook.
1844   #
1845   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1846   # both show the requests happening. Without creating the address book,
1847   # after creating a contact, a sync would delete it.
1848   #
1849   # Address books correspond to .props files in the radicale dir.
1850   #
1851   #  Some background is here,
1852   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1853   # which shows separate vcard option is from rfc 6350, the other is 2426,
1854   # radicale page says it implements the former not the latter,
1855   # which conflicts with the documentation of which to select, but whatever.
1856   # http://radicale.org/technical_choices/
1857   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1858   #
1859   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1860
1861   # Note, radicale had built-in git support to track changes, but they
1862   # removed it in 2.0.
1863
1864 fi
1865
1866 # * dovecot
1867
1868 # ** $MAIL_HOST|bk|je)
1869 case $HOSTNAME in
1870   $MAIL_HOST|bk|je)
1871     # based on a little google and package search, just the dovecot
1872     # packages we need instead of dovecot-common.
1873     #
1874     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1875     # directly.  The reason to do this is to use dovecot\'s sieve, which
1876     # can generally do more than exims filters (a few things less) and
1877     # sieve has the benefit of being supported in postfix and
1878     # proprietary/weird environments, so there is more examples on the
1879     # internet.
1880     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1881
1882     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1883       if [[ -e $f ]]; then
1884         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1885         break
1886       fi
1887     done
1888     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1889       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1890     done
1891
1892     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1893     u /etc/dovecot/dhparam <<'EOF'
1894 -----BEGIN DH PARAMETERS-----
1895 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1896 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1897 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1898 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1899 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1900 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1901 -----END DH PARAMETERS-----
1902 EOF
1903     {
1904
1905       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1906         cat <<'EOF'
1907 ssl_cert = </etc/exim4/fullchain.pem
1908 ssl_key = </etc/exim4/privkey.pem
1909 EOF
1910       else
1911         # We have a lets encrypt hooks that puts things here.
1912         # This is just for bk, which uses the vpn cert in exim
1913         # for sending mail, but the local hostname cert for
1914         # dovecot.
1915         cat <<'EOF'
1916 ssl_cert = </etc/exim4/exim.crt
1917 ssl_key = </etc/exim4/exim.key
1918 EOF
1919       fi
1920
1921       cat <<'EOF'
1922 # https://ssl-config.mozilla.org
1923 ssl = required
1924 # this is the same as the certbot list, i check changes in /a/bin/ds/filesystem/usr/local/bin/check-lets-encrypt-ssl-settings
1925 ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
1926 ssl_protocols = TLSv1.2
1927 ssl_prefer_server_ciphers = no
1928
1929 protocol lmtp {
1930 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1931 # default is just $mail_plugins
1932   mail_plugins = $mail_plugins sieve
1933 }
1934 EOF
1935       if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show dovecot-core)" ge 1:2.3; then
1936         cat <<EOF
1937 ssl_dh = </etc/dovecot/dhparam
1938 EOF
1939       fi
1940     } >/etc/dovecot/local.conf
1941
1942     ;;&
1943
1944   # **  $MAIL_HOST)
1945   $MAIL_HOST)
1946     # If we changed 90-sieve.conf and removed the active part of the
1947     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1948     # default config if not needed. This won\'t work as a symlink in /a/c
1949     # unfortunately.
1950     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1951
1952     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1953       m touch $uhome/sieve/personal{,end}{,test}.sieve
1954     fi
1955
1956     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1957     cat >>/etc/dovecot/local.conf <<EOF
1958 # simple password file based login
1959 !include conf.d/auth-passwdfile.conf.ext
1960
1961 # ian: %u is used for alerts user vs iank
1962 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1963 mail_uid = $u
1964 mail_gid = $u
1965
1966 protocol lmtp {
1967 # For a normal setup with exim, we need something like this, which
1968 # removes the domain part
1969 #  auth_username_format = %Ln
1970 #
1971 #  or else # Exim says something like
1972 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1973 # Dovecot verbose log says something like
1974 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1975 # reference: http://wiki.dovecot.org/LMTP/Exim
1976 #
1977 # However, I use this to direct all mail to the same inbox.
1978 # A normal way to do this, which I did at first is to have
1979 # a router in exim almost at the end, eg 950,
1980 #local_catchall:
1981 #  debug_print = "R: catchall for \$local_part@\$domain"
1982 #  driver = redirect
1983 #  domains = +local_domains
1984 #  data = $u
1985 # based on
1986 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1987 # with superflous options removed.
1988 # However, this causes the envelope to be rewritten,
1989 # which makes filtering into mailboxes a little less robust or more complicated,
1990 # so I've done it this way instead. it also requires
1991 # modifying the local router in exim.
1992   auth_username_format = $u
1993 }
1994 EOF
1995     ;;&
1996   # **  bk|je)
1997   bk|je)
1998     chown -R mail.mail /m/md
1999
2000     f=/etc/dovecot/conf.d/10-auth.conf
2001     if [[ -e $f ]]; then
2002       mv $f $f-iank-disabled
2003     fi
2004
2005     cat >>/etc/dovecot/local.conf <<EOF
2006 !include /etc/dovecot/local.conf.ext
2007
2008 # for debugging info, uncomment these.
2009 # logs go to syslog and to /var/log/mail.log
2010 #auth_verbose=yes
2011 #mail_debug=yes
2012
2013
2014 protocol lmtp {
2015 # This downcases the localpart. default is case sensitive.
2016 # case sensitive local part will miss out on valid email when some person or system
2017 # mistakenly capitalizes things.
2018   auth_username_format = %Lu
2019 }
2020
2021 # make 147 only listen on localhost, plan to use for nextcloud.
2022 # copied from mailinabox
2023 service imap-login {
2024   inet_listener imap {
2025     address = 127.0.0.1
2026   }
2027 }
2028 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
2029 service auth {
2030   unix_listener auth-client {
2031     user = Debian-exim
2032     group = Debian-exim
2033   }
2034 }
2035
2036
2037 plugin {
2038   sieve_before = /etc/dovecot/sieve-spam.sieve
2039   # from mailinabox
2040   sieve = /m/sieve/%d/%n.sieve
2041   sieve_dir = /m/sieve/%d/%n
2042 }
2043
2044
2045 # all taken from mailinabox.
2046 mail_location = maildir:/m/md/%d/%n
2047 # meh, ok.
2048 mail_privileged_group = mail
2049 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
2050 first_valid_uid = 1
2051
2052 # todo: test these changes in the universal config
2053 # mailboxes taken from mailinabox but removed
2054 # settings duplicate to defaults
2055 namespace inbox {
2056   mailbox INBOX {
2057     auto = subscribe
2058   }
2059   mailbox Spam {
2060     special_use = \Junk
2061     auto = subscribe
2062   }
2063   mailbox Drafts {
2064     auto = subscribe
2065   }
2066   mailbox Sent {
2067     auto = subscribe
2068   }
2069   mailbox Trash {
2070     auto = subscribe
2071   }
2072   mailbox Archive {
2073     special_use = \Archive
2074     auto = subscribe
2075   }
2076 }
2077 auth_mechanisms = plain login
2078 EOF
2079
2080     u /etc/dovecot/sieve-spam.sieve <<'EOF'
2081 require ["regex", "fileinto", "imap4flags"];
2082
2083 if allof (header :regex "X-Spam-Status" "^Yes") {
2084   fileinto "Spam";
2085   stop;
2086 }
2087 EOF
2088
2089     u /etc/dovecot/local.conf.ext <<'EOF'
2090 passdb {
2091   driver = sql
2092   args = /etc/dovecot/dovecot-sql.conf.ext
2093 }
2094 userdb {
2095   driver = sql
2096   args = /etc/dovecot/dovecot-sql.conf.ext
2097 }
2098
2099 EOF
2100
2101     u /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
2102 # from mailinabox
2103 driver = sqlite
2104 # for je and bk, populated the testignore users for the relevant domains
2105 connect = /m/rc/users.sqlite
2106 default_pass_scheme = SHA512-CRYPT
2107 password_query = SELECT email as user, password FROM users WHERE email='%u';
2108 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
2109 iterate_query = SELECT email AS user FROM users;
2110 EOF
2111     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
2112
2113     # db needs to be in a www-data writable directory
2114     db=/m/rc/users.sqlite
2115     if [[ ! -s $db ]]; then
2116       m mkdir -p /m/rc
2117       m sqlite3 $db <<'EOF'
2118 CREATE TABLE users (
2119 id INTEGER PRIMARY KEY AUTOINCREMENT,
2120 email TEXT NOT NULL UNIQUE,
2121 password TEXT NOT NULL,
2122 extra,
2123 privileges TEXT NOT NULL DEFAULT '');
2124 EOF
2125     fi
2126     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
2127     #
2128     # example of adding a user:
2129     # hash: doveadm pw -s SHA512-CRYPT -p passhere
2130     # sqlite3 /m/rc/users.sqlite <<'EOF'
2131     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
2132     #EOF
2133     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
2134
2135     # this should be at the end since it requires a valid dovecot config
2136     m sievec /etc/dovecot/sieve-spam.sieve
2137     ;;&
2138   # **  bk)
2139   bk)
2140     # roundcube uses this
2141     mkdir -p /m/sieve
2142     chown mail.mail /m/sieve
2143     m pi dovecot-managesieved
2144     ;;
2145 esac
2146
2147 # * thunderbird autoconfig setup
2148
2149 bkdomains=(expertpathologyreview.com amnimal.ninja)
2150 if [[ $HOSTNAME == bk ]]; then
2151   for domain in ${bkdomains[@]}; do
2152     m /a/exe/web-conf apache2 autoconfig.$domain
2153     dir=/var/www/autoconfig.$domain/html/mail
2154     m mkdir -p $dir
2155     # taken from mailinabox
2156     u $dir/config-v1.1.xml <<EOF
2157 <?xml version="1.0" encoding="UTF-8"?>
2158 <clientConfig version="1.1">
2159     <emailProvider id="$domain">
2160       <domain>$domain</domain>
2161
2162       <displayName>$domain Mail</displayName>
2163       <displayShortName>$domain</displayShortName>
2164
2165       <incomingServer type="imap">
2166          <hostname>mail2.iankelling.org</hostname>
2167          <port>993</port>
2168          <socketType>SSL</socketType>
2169          <username>%EMAILADDRESS%</username>
2170          <authentication>password-cleartext</authentication>
2171       </incomingServer>
2172
2173       <outgoingServer type="smtp">
2174          <hostname>mail2.iankelling.org</hostname>
2175          <port>587</port>
2176          <socketType>STARTTLS</socketType>
2177          <username>%EMAILADDRESS%</username>
2178          <authentication>password-cleartext</authentication>
2179          <addThisServer>true</addThisServer>
2180          <useGlobalPreferredServer>false</useGlobalPreferredServer>
2181       </outgoingServer>
2182
2183       <documentation url="https://$domain/">
2184          <descr lang="en">$domain website.</descr>
2185       </documentation>
2186     </emailProvider>
2187
2188     <webMail>
2189       <loginPage url="https://$domain/roundcube" />
2190       <loginPageInfo url="https://$domain/roundcube" >
2191         <username>%EMAILADDRESS%</username>
2192         <usernameField id="rcmloginuser" name="_user" />
2193         <passwordField id="rcmloginpwd" name="_pass" />
2194         <loginButton id="rcmloginsubmit" />
2195       </loginPageInfo>
2196     </webMail>
2197     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
2198 </clientConfig>
2199 EOF
2200   done
2201 fi
2202
2203 # * roundcube setup
2204
2205 if [[ $HOSTNAME == bk ]]; then
2206
2207   # zip according to /installer
2208   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
2209   # $config['enable_installer'] = true;
2210   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
2211
2212   ### begin composer install
2213   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
2214   # cd $(mktemp -d)
2215   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
2216   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
2217   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
2218   #   echo 'ERROR: Invalid composer installer checksum' >&2
2219   #   rm -fv composer-setup.php
2220   #   exit 1
2221   # fi
2222   # m php composer-setup.php --quiet
2223   # rm -fv composer-setup.php
2224   # m mv composer.phar /usr/local/bin
2225
2226   # the above method gets composer2, carddav plugin at least doesnt work with that
2227   # yet, it was just released 10-24-2020.
2228   m cd /usr/local/bin
2229   m wget -nv -N https://getcomposer.org/composer-1.phar
2230   chmod +x composer-1.phar
2231   ### end composer install
2232
2233   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
2234   ncdirs=(/var/www/ncninja)
2235   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
2236   # point debian cronjob to our local install, preventing daily cron error
2237
2238   # debian's cronjob will fail, remove both paths it uses just to be sure
2239   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
2240
2241   #### begin dl roundcube
2242   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
2243   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
2244   cd /root
2245   if [[ -e $f ]]; then
2246     timestamp=$(stat -c %Y $f)
2247   else
2248     timestamp=0
2249   fi
2250   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
2251   new_timestamp=$(stat -c %Y $f)
2252   for rcdir in ${rcdirs[@]}; do
2253     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
2254       m tar -C /usr/local/lib --no-same-owner -zxf $f
2255       m rm -rf $rcdir
2256       m mv /usr/local/lib/roundcubemail-$v $rcdir
2257     fi
2258   done
2259   #### end dl roundcube
2260
2261   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2262     domain=${bkdomains[i]}
2263     rcdir=${rcdirs[i]}
2264     rcbase=${rcdir##*/}
2265     ncdir=${ncdirs[i]}
2266     myncdir=/root/${ncdir##*/}
2267     mkdir -p $myncdir
2268
2269     # copied from debians cronjob
2270     u /etc/cron.d/$rcbase <<EOF
2271 #  Roundcube database cleaning: finally removes all records that are
2272 #  marked as deleted.
2273 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
2274 EOF
2275
2276     m /a/exe/web-conf - apache2 $domain <<EOF
2277 Alias /roundcube $rcdir
2278 ### begin roundcube settings
2279 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
2280 <Directory $rcdir/>
2281   Options +FollowSymLinks
2282   # This is needed to parse $rcdir/.htaccess.
2283   AllowOverride All
2284   Require all granted
2285 </Directory>
2286 # Protecting basic directories:
2287 <Directory $rcdir/config>
2288   Options -FollowSymLinks
2289   AllowOverride None
2290 </Directory>
2291 ### end roundcube settings
2292
2293
2294 ### begin nextcloud settings
2295 Alias /nextcloud "$ncdir/"
2296 <Directory $ncdir/>
2297   Require all granted
2298   AllowOverride All
2299   Options FollowSymLinks MultiViews
2300
2301   <IfModule mod_dav.c>
2302     Dav off
2303   </IfModule>
2304
2305 </Directory>
2306
2307 # based on install checker, links to
2308 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
2309 # their example was a bit wrong, I figured it out by adding
2310 # LogLevel warn rewrite:trace5
2311 # then watching the apache logs
2312
2313 RewriteEngine on
2314 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2315 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2316 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2317 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2318 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2319 ### end nextcloud settings
2320 EOF
2321     if [[ ! -e $rcdir/config/secret ]]; then
2322       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2323     fi
2324     secret=$(cat $rcdir/config/secret)
2325
2326     rclogdir=/var/log/$rcbase
2327     rctmpdir=/var/tmp/$rcbase
2328     rcdb=/m/rc/$rcbase.sqlite
2329     # config from mailinabox
2330     u $rcdir/config/config.inc.php <<EOF
2331 <?php
2332 \$config = array();
2333 # debian creates this for us
2334 \$config['log_dir'] = '$rclogdir/';
2335 # debian also creates a temp dir, but it is under its install dir,
2336 # seems better to have our own.
2337 \$config['temp_dir'] = '$rctmpdir/';
2338 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2339 \$config['default_host'] = 'ssl://localhost';
2340 \$config['default_port'] = 993;
2341 \$config['imap_conn_options'] = array(
2342   'ssl'         => array(
2343      'verify_peer'  => false,
2344      'verify_peer_name'  => false,
2345    ),
2346  );
2347 \$config['imap_timeout'] = 15;
2348 \$config['smtp_server'] = 'tls://127.0.0.1';
2349 \$config['smtp_conn_options'] = array(
2350   'ssl'         => array(
2351      'verify_peer'  => false,
2352      'verify_peer_name'  => false,
2353    ),
2354  );
2355 \$config['product_name'] = 'webmail';
2356 \$config['des_key'] = '$secret';
2357 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2358 \$config['skin'] = 'elastic';
2359 \$config['login_autocomplete'] = 2;
2360 \$config['password_charset'] = 'UTF-8';
2361 \$config['junk_mbox'] = 'Spam';
2362 # disable builtin addressbook
2363 \$config['address_book_type'] = '';
2364 ?>
2365 EOF
2366
2367     m mkdir -p $rclogdir
2368     m chmod 750 $rclogdir
2369     m chown www-data:adm $rclogdir
2370     # note: subscribed to updates:
2371     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2372     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2373     m mkdir -p $rctmpdir /m/rc
2374     m chown -R www-data.www-data $rctmpdir /m/rc
2375     m chmod 750 $rctmpdir
2376     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2377     # todo: check for other mailinabox things
2378     m sudo -u www-data touch $rclogdir/errors.log
2379
2380     #### begin carddav install
2381     # This is the official roundcube carddav repo.
2382     # Install doc suggests downloading with composer, but that
2383     # didnt work, it said some ldap package for roundcube was missing,
2384     # but I dont want to download some extra ldap thing.
2385     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2386     verf=$rcdir/plugins/carddav/myversion
2387     upgrade=false
2388     install=false
2389     v=4.0.0
2390     if [[ -e $verf ]]; then
2391       if [[ $(cat $verf) != "$v" ]]; then
2392         install=true
2393         upgrade=true
2394       fi
2395     else
2396       install=true
2397     fi
2398     if $install; then
2399       m rm -rf $rcdir/plugins/carddav
2400       tmpd=$(mktemp -d)
2401       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2402       cd $rcdir/plugins
2403       tar xzf $tmpd/t.tgz
2404       rm -rf $tmpd
2405       m chown -R www-data:www-data $rcdir/plugins/carddav
2406       m cd $rcdir/plugins/carddav
2407       if $upgrade; then
2408         m sudo -u www-data composer-1.phar update --no-dev
2409       else
2410         m sudo -u www-data composer-1.phar install --no-dev
2411       fi
2412       m chown -R root:root $rcdir/plugins/carddav
2413       echo $v >$verf
2414     fi
2415
2416     # So, strangely, this worked in initial testing, but then
2417     # on first run it wouldn't show the existing contacts until
2418     # I went into the carddav settings and did "force immediate sync",
2419     # which seemed to fix things. Note, some of these settings
2420     # get initalized per/addressbook in the db, then need changing
2421     # there or through the settings menu.
2422
2423     # About categories, see https://www.davx5.com/tested-with/nextcloud
2424     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2425     u $rcdir/plugins/carddav/config.inc.php <<EOF;
2426 <?php
2427 \$prefs['_GLOBAL']['hide_preferences'] = false;
2428 \$prefs['davserver'] = array(
2429 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2430   'name'         =>  'Main',
2431   'username'     =>  '%u', // login username
2432   'password'     =>  '%p', // login password
2433   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2434   'active'       =>  true,
2435   'readonly'     =>  false,
2436   'refresh_time' => '00:10:00',
2437   'fixed'        =>  array('username','password'),
2438   'use_categories' => false,
2439   'hide'        =>  false,
2440 );
2441 ?>
2442 EOF
2443     #### end carddav install
2444
2445     cd $rcdir/plugins
2446     if [[ ! -d html5_notifier ]]; then
2447       m git clone https://github.com/stremlau/html5_notifier
2448     fi
2449     cd $rcdir/plugins/html5_notifier
2450     m git pull --rebase
2451
2452     # todo: try out roundcube plugins: thunderbird labels
2453
2454     # Password changing plugin settings
2455     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2456 # following are from mailinabox
2457 $config['password_minimum_length'] = 8;
2458 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2459 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2460 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2461 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2462 $config['password_dovecotpw_with_method'] = true;
2463 EOF
2464     # so PHP can use doveadm, for the password changing plugin
2465     m usermod -a -G dovecot www-data
2466     m usermod -a -G mail $u
2467
2468     # so php can update passwords
2469     m chown www-data:dovecot /m/rc/users.sqlite
2470     m chmod 664 /m/rc/users.sqlite
2471
2472     # Run Roundcube database migration script (database is created if it does not exist)
2473     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2474     m chown www-data:www-data $rcdb
2475     m chmod 664 $rcdb
2476   done # end loop over domains and rcdirs
2477
2478   ### begin php setup for rc ###
2479   # Enable PHP modules.
2480   m phpenmod -v php mcrypt imap
2481   # dpkg says this is required.
2482   # nextcloud needs these too
2483   m a2enmod proxy_fcgi setenvif
2484   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2485   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2486   m a2enconf $fpm
2487   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2488   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2489   m a2dismod php$phpver
2490   # according to /install, we should set date.timezone,
2491   # but that is dumb, the system already has the right zone in
2492   # $rclogdir/errors.log
2493   # todo: consider other settings in
2494   # /a/opt/mailinabox/setup/nextcloud.sh
2495   u /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2496 apc.enable_cli = 1
2497 EOF
2498
2499   u /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2500 date.timezone = "America/New_York"
2501 # for nextcloud
2502 upload_max_filesize = 2000M
2503 post_max_size = 2000M
2504 # install checker, nextcloud/settings/admin/overview
2505 memory_limit = 512M
2506 EOF
2507   m systemctl restart $fpm
2508   # dunno if reload/restart is needed
2509   m systemctl reload apache2
2510   # note bk backups are defined in crontab outside this file
2511   ### end php setup for rc ###
2512
2513 fi # end roundcube setup
2514
2515 # * nextcloud setup
2516
2517 if [[ $HOSTNAME == bk ]]; then
2518   # from install checker, nextcloud/settings/admin/overview and
2519   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2520   # curl from the web installer requirement, but i switched to cli
2521   # it recommends php-file info, but that is part of php7.3-common, already got installed
2522   # with roundcube.
2523   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2524
2525   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2526   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2527 [www]
2528 clear_env = no
2529 EOF
2530
2531   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2532     domain=${bkdomains[i]}
2533     ncdir=${ncdirs[i]}
2534     ncbase=${ncdir##*/}
2535     m cd /var/www
2536     if [[ ! -e $ncdir/index.php ]]; then
2537       # if we wanted to only install a specific version, use something like
2538       # file=latest-22.zip
2539       file=latest.zip
2540       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2541       m rm -rf nextcloud
2542       m unzip -q $file
2543       m rm -f $file
2544       m chown -R www-data.www-data nextcloud
2545       m mv nextcloud $ncdir
2546     fi
2547
2548     if [[ ! -e $myncdir/done-install ]]; then
2549       m cd $ncdir
2550       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2551       m touch $myncdir/done-install
2552     fi
2553
2554     # note, strange this happend where updater did not increment the version var,
2555     # mine was stuck on 20. I manually updated it.
2556     m cd $ncdir/config
2557     if [[ ! -e $myncdir/config.php-orig ]]; then
2558       m cp -a config.php $myncdir/config.php-orig
2559     fi
2560     cat $myncdir/config.php-orig - >$myncdir/tmp.php <<EOF
2561 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2562 \$CONFIG["mail_smtpmode"] = "sendmail";
2563 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2564 \$CONFIG["mail_smtpport"] = 25;
2565 \$CONFIG["mail_smtptimeout"] = 10;
2566 \$CONFIG["mail_smtpsecure"] = "";
2567 \$CONFIG["mail_smtpauth"] = false;
2568 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2569 \$CONFIG["mail_smtpname"] = "";
2570 \$CONFIG["mail_smtppassword"] = "";
2571 \$CONFIG["mail_domain"] = "$domain";
2572
2573 # https://github.com/nextcloud/user_external#readme
2574 # plus mailinabox example
2575 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2576
2577
2578 # based on installer check
2579 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2580 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2581
2582 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2583 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2584 \$CONFIG['trusted_domains'] = array (
2585         0 => '$domain',
2586     );
2587 #\$CONFIG[''] = '';
2588 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2589 var_export(\$CONFIG);
2590 fwrite(STDOUT, ";\n");
2591 EOF
2592     e running php $myncdir/tmp.php
2593     # note: we leave it around place for debugging
2594     php $myncdir/tmp.php >config.php
2595     cd $ncdir
2596     m sudo -u www-data php occ maintenance:update:htaccess
2597     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2598     # user_external not compaible with nc 23
2599     for app in contacts calendar; do
2600       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2601         cd $ncdir
2602         m sudo -u www-data php occ app:install $app
2603       fi
2604     done
2605     u /etc/systemd/system/$ncbase.service <<EOF
2606 [Unit]
2607 Description=ncup $ncbase
2608 After=multi-user.target
2609
2610 [Service]
2611 Type=oneshot
2612 ExecStart=/usr/local/bin/ncup $ncbase
2613 User=www-data
2614 IOSchedulingClass=idle
2615 CPUSchedulingPolicy=idle
2616 EOF
2617     u /etc/systemd/system/$ncbase.timer <<EOF
2618 [Unit]
2619 Description=ncup $ncbase timer
2620
2621 [Timer]
2622 OnCalendar=Daily
2623
2624 [Install]
2625 WantedBy=timers.target
2626 EOF
2627     systemctl enable --now $ncbase.timer
2628     u /usr/local/bin/ncup <<'EOFOUTER'
2629 #!/bin/bash
2630
2631 source /usr/local/lib/err
2632
2633 m() { printf "%s\n" "$*";  "$@"; }
2634 err-cleanup() {
2635   echo failed nextcloud update for $ncbase >&2
2636   # -odf or else systemd will kill the background delivery process
2637   # and the message will sit in the queue until the next queue run.
2638   exim -odf -t <<EOF
2639 To: alerts@iankelling.org
2640 From: www-data@$(hostname -f)
2641 Subject: failed nextcloud update for $ncbase
2642
2643 For logs, run: jr -u $ncbase
2644 EOF
2645 }
2646
2647 if [[ $(id -u -n) != www-data ]]; then
2648   echo error: running as wrong user: $(id -u -n), expected www-data
2649   exit 1
2650 fi
2651
2652 if [[ ! $1 ]]; then
2653   echo error: expected an arg, nextcloud relative base dir
2654   exit 1
2655 fi
2656
2657 ncbase=$1
2658 cd /var/www/$ncbase
2659 # https://docs.nextcloud.com/server/22/admin_manual/maintenance/update.html?highlight=updater+phar
2660 m php /var/www/$ncbase/updater/updater.phar -n
2661 EOFOUTER
2662     chmod +x /usr/local/bin/ncup
2663
2664     mkdir -p /var/www/cron-errors
2665     chown www-data.www-data /var/www/cron-errors
2666     u /etc/cron.d/$ncbase <<EOF
2667 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2668 SHELL=/bin/bash
2669 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2670 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2671 EOF
2672
2673   done
2674 fi
2675
2676
2677 # * exim host conditional config
2678
2679 # ** exim certs
2680
2681 all_dirs=(/p/c/filesystem)
2682 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2683   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2684 done
2685 files=()
2686 for d in ${all_dirs[@]}; do
2687   f=$d/etc/exim4/passwd
2688   if [[ -e $f  ]]; then
2689     files+=($f)
2690   fi
2691   tmp=($d/etc/exim4/*.pem)
2692   if (( ${#tmp[@]} )); then
2693     files+=(${tmp[@]})
2694   fi
2695 done
2696
2697 if (( ${#files[@]} )); then
2698   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2699 fi
2700
2701
2702 # ** exim: auth
2703
2704 case $HOSTNAME in
2705   bk|je)
2706     # avoid accepting mail for invalid users
2707     # https://wiki.dovecot.org/LMTP/Exim
2708     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2709 deny
2710   message = invalid recipient
2711   domains = +local_domains
2712   !verify = recipient/callout=no_cache
2713 EOF
2714     u /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2715 dovecot_plain:
2716   driver = dovecot
2717   public_name = PLAIN
2718   server_socket = /var/run/dovecot/auth-client
2719   server_set_id = $auth1
2720 EOF
2721     ;;
2722 esac
2723 if $bhost_t; then
2724   u /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2725 # from 30_exim4-config_examples
2726 plain_server:
2727 driver = plaintext
2728 public_name = PLAIN
2729 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2730 server_set_id = $auth2
2731 server_prompts = :
2732 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2733 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2734 .endif
2735 EOF
2736 fi
2737
2738 # ** exim: main daemon use non-default config file
2739 case $HOSTNAME in
2740   bk|$MAIL_HOST)
2741     # to see the default comments in /etc/default/exim4:
2742     # s update-exim4defaults --force --init
2743     # which will overwrite any existing file
2744     u /etc/default/exim4 <<'EOF'
2745 QUEUERUNNER='combined'
2746 QUEUEINTERVAL='30m'
2747 COMMONOPTIONS='-C /etc/exim4/my.conf'
2748 UPEX4OPTS='-o /etc/exim4/my.conf'
2749 # i use epanic-clean for alerting if there are bad paniclog entries
2750 E4BCD_WATCH_PANICLOG='no'
2751 EOF
2752     # make exim be a nonroot setuid program.
2753     chown Debian-exim:Debian-exim /usr/sbin/exim4
2754     # needs guid set in order to become Debian-exim
2755     chmod g+s,u+s /usr/sbin/exim4
2756     # need this to avoid error on service reload:
2757     # 2022-08-07 18:44:34.005 [892491] pid 892491: SIGHUP received: re-exec daemon
2758     # 2022-08-07 18:44:34.036 [892491] cwd=/var/spool/exim4 5 args: /usr/sbin/exim4 -bd -q30m -C /etc/exim4/my.conf
2759     # 2022-08-07 18:44:34.043 [892491] socket bind() to port 25 for address (any IPv6) failed: Permission denied: waiting 30s before trying again (9 more tries)
2760     # note: the daemon gives up and dies after retrying those 9 times.
2761     # I came upon this by guessing and trial and error.
2762     setcap CAP_NET_BIND_SERVICE+ei /usr/sbin/exim4
2763     u /etc/exim4/trusted_configs <<'EOF'
2764 /etc/exim4/my.conf
2765 EOF
2766     ;;
2767   *)
2768     # default file
2769     u /etc/default/exim4 <<'EOF'
2770 QUEUERUNNER='combined'
2771 QUEUEINTERVAL='30m'
2772 EOF
2773     ;;
2774 esac
2775
2776 # ** exim non-root
2777
2778 case $HOSTNAME in
2779   bk|je|li)
2780     # no reason to expect it to ever be there.
2781     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2782     ;;
2783   *)
2784     dirs=()
2785     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2786       if [[ -d $d ]]; then
2787         dirs+=($d)
2788       fi
2789     done
2790     u /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2791 [Service]
2792 # see 56.2 Root privilege in exim spec
2793 AmbientCapabilities=CAP_NET_BIND_SERVICE
2794 # https://www.redhat.com/sysadmin/mastering-systemd
2795 # things that seem good and reasonabl.e
2796 PrivateTmp=yes
2797 ProtectHome=yes
2798 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2799 # this whole setting doesnt work. tried it with a newer systemd 250 though
2800 # an nspawn, and it worked there.
2801 InaccessiblePaths=${dirs[@]}
2802 # this gives us the permission denied error:
2803 # socket bind() to port 25 for address (any IPv6) failed: Permission denied
2804 # but we also have to set the file capabilities to avoid the error.
2805 #NoNewPrivileges=yes
2806 ProtectSystem=yes
2807
2808 # when we get newer systemd
2809 #ProtectDevices=yes
2810 EOF
2811     u /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2812 # see 56.2 Root privilege in exim spec
2813 deliver_drop_privilege = true
2814 EOF
2815     files=(
2816       300_exim4-config_real_local
2817       600_exim4-config_userforward
2818       700_exim4-config_procmail
2819       800_exim4-config_maildrop
2820       mmm_mail4root
2821     )
2822     for f in ${files[@]}; do
2823       echo "# iank: removed due to running nonroot"|u /etc/exim4/conf.d/router/$f
2824     done
2825     ;;
2826 esac
2827
2828 case $HOSTNAME in
2829
2830   # ** $MAIL_HOST|bk|je)
2831   $MAIL_HOST|bk|je)
2832
2833     echo|u /etc/exim4/conf.d/router/165_backup_local
2834
2835     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2836 # note: some things we don't set that are here by default because they are unused.
2837 dc_local_interfaces=''
2838 dc_eximconfig_configtype='internet'
2839 dc_localdelivery='dovecot_lmtp'
2840 EOF
2841     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2842 # recommended if dns is expected to work
2843 CHECK_RCPT_VERIFY_SENDER = true
2844 # default config comment says: If you enable this, you might reject legitimate mail,
2845 # but eggs has had this a long time, so that seems unlikely.
2846 CHECK_RCPT_SPF = true
2847 CHECK_RCPT_REVERSE_DNS = true
2848 CHECK_MAIL_HELO_ISSUED = true
2849
2850
2851 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2852 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2853
2854 # testing dmarc
2855 #dmarc_tld_file = /etc/public_suffix_list.dat
2856
2857 EOF
2858     ;;&
2859
2860   # ** $MAIL_HOST|bk)
2861   $MAIL_HOST|bk)
2862
2863
2864     # no clamav on je, it has 1.5g memory and clamav uses most of it
2865     u /etc/exim4/conf.d/clamav_data_acl <<'EOF'
2866 warn
2867 !hosts = +iank_trusted
2868 !authenticated = plain_server:login_server
2869 condition = ${if def:malware_name}
2870 remove_header = Subject:
2871 add_header = Subject: [Clamav warning: $malware_name] $h_subject
2872 log_message = heuristic malware warning: $malware_name
2873 EOF
2874
2875     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2876 # je.b8.nz will run out of memory with freshclam
2877 av_scanner = clamd:/var/run/clamav/clamd.ctl
2878 EOF
2879
2880     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2881 deny
2882   malware = */defer_ok
2883   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2884   message = This message was detected as possible malware ($malware_name).
2885 EOF
2886
2887     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2888 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2889 # smarthost config type, not sure.
2890 # failing message on mail-tester.com:
2891 # We check if there is a server (A Record) behind your hostname kd.
2892 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2893 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2894 # and this one seemed appropriate from grepping config.
2895 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2896 # mail to kd, so this should basically be a name that no host has as their
2897 # canonical hostname since the actual host sits behind a nat and changes.
2898 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2899 # I used this to avoid sender verification, didnt work but it still
2900 # makes sense based on the spec.
2901 hosts_treat_as_local = defaultnn.b8.nz
2902
2903 # Outside nn, we get the default cert location from a debian macro,
2904 # and the cert file is put in place by a certbot hook.
2905 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2906 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2907 EOF
2908
2909     u /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2910 gnusmarthost:
2911   debug_print = "R: smarthost for $local_part@$domain"
2912   driver = manualroute
2913   domains = ! +local_domains
2914 # send most mail through eggs, helps fsfs sender reputation.
2915 # uncomment and optionally move to 188 file to send through my own servers again
2916   senders = *@gnu.org
2917   transport = smarthost_dkim
2918   route_list = * fencepost.gnu.org::587 byname
2919   host_find_failed = ignore
2920   same_domain_copy_routing = yes
2921   no_more
2922 EOF
2923
2924     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2925 10.173.8.1 defaultnn.b8.nz
2926 EOF
2927     ;;&
2928   # ** $MAIL_HOST)
2929   $MAIL_HOST)
2930
2931     u /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2932 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2933 # use vpn transport. lower priority so it overrides the default route.
2934 # Use this in case our vpn fails, we dont send anything without it.
2935 .ifdef DCconfig_internet
2936 dnslookup_vpn:
2937   debug_print = "R: dnslookup for $local_part@$domain"
2938   driver = dnslookup
2939   domains = ! +local_domains
2940   transport = remote_smtp_vpn
2941   same_domain_copy_routing = yes
2942   ignore_target_hosts = <; 0.0.0.0 ; 127.0.0.0/8 ; 192.168.0.0/16 ; 172.16.0.0/12 ; 10.0.0.0/8 ; 169.254.0.0/16 ; 255.255.255.255 ; ::/128 ; ::1/128 ; fc00::/7 ; fe80::/10 ; 100::/64
2943   no_more
2944 .endif
2945 EOF
2946
2947
2948     # note on backups: I used to do an automatic sshfs and restricted
2949     # permissions to a specific directory on the remote server, /bu/mnt,
2950     # which required using a dedicated user, but realized smtp will be
2951     # more reliable and less fuss. If I ever need that again, see the
2952     # history of this file, and bum in brc2.
2953     u /etc/exim4/conf.d/router/161_backup_redir_nn <<'EOF'
2954 backup_redir_nn:
2955 driver = redirect
2956 # b is just an arbirary short string
2957 data = b@eximbackup.b8.nz
2958 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2959 # note, to test this, i could temporarily allow testignore.
2960 # alerts avoids potential mail loop. root is already
2961 # redirected earlier, so that is just being overly cautious.
2962 local_parts = ! root : ! testignore : ! alerts
2963 unseen = true
2964 errors_to = alerts@iankelling.org
2965 EOF
2966
2967
2968
2969     # This allows for forwarded mail to not get most rcpt checks, especially SPF,
2970     # which would incorrectly get denied.
2971     u /etc/exim4/host_local_deny_exceptions <<'EOF'
2972 mail.fsf.org
2973 *.posteo.de
2974 EOF
2975
2976     # cron email from smarthost hosts will automatically be to
2977     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2978     # case that doesn't work, we still want to accept that mail, but not
2979     # from any host except the smarthosts. local_hostnames and this rule
2980     # is for that purpose.
2981     u /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2982 deny
2983   !authenticated = *
2984   domains = +local_hostnames
2985   message = no relay
2986
2987 # for testing bounce behavior
2988 #deny
2989 #  senders = testlist-bounces+test=zroe.org@fsf.org
2990 #  message = iank-bounce
2991 EOF
2992     echo|u /etc/exim4/conf.d/router/880_universal_forward
2993
2994
2995     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2996 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
2997 EOF
2998
2999
3000     u /etc/exim4/conf.d/router/186_sentarchive_nn <<'EOF'
3001 # ian: save a copy of sent mail. i thought of other ways to
3002 # do this, for example, to only save sent mail that is not sent
3003 # from my mail client which saves a copy by default, but in the
3004 # end, it seems simplest to turn that off. We want to save
3005 # external mail sent by smarthosts.
3006 sentarchive_nn:
3007   driver = redirect
3008   domains = ! +local_domains
3009   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3010   data    = vojdedIdNejyebni@b8.nz
3011   unseen
3012 EOF
3013
3014
3015     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
3016     # and also have mail.iankelling.org whitelisted as a relay domain.
3017     # I could avoid that if I changed this to submit to 587 with a
3018     # password like a standard mua.
3019     u /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
3020 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
3021 # replaced DCsmarthost with hostname
3022 fsfsmarthost:
3023   debug_print = "R: smarthost for $local_part@$domain"
3024   driver = manualroute
3025   domains = ! +local_domains
3026   senders = *@fsf.org
3027   transport = remote_smtp_smarthost
3028   route_list = * mail.fsf.org::587 byname
3029   host_find_failed = ignore
3030   same_domain_copy_routing = yes
3031   no_more
3032
3033 posteosmarthost:
3034   debug_print = "R: smarthost for $local_part@$domain"
3035   driver = manualroute
3036   domains = ! +local_domains
3037   senders = *@posteo.net
3038   transport = remote_smtp_smarthost
3039   route_list = * posteo.de::587 byname
3040   host_find_failed = ignore
3041   same_domain_copy_routing = yes
3042   no_more
3043 EOF
3044
3045     # Greping /etc/exim4, unqualified mails this would end up as
3046     # a return path, so it should go somewhere we will see.
3047     # The debconf output about mailname is as follows:
3048     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
3049     # name.
3050     # This name will also be used by other programs. It should be the single, fully
3051     # qualified domain name (FQDN).
3052     # Thus, if a mail address on the local host is foo@example.org, the correct value for
3053     # this option would be example.org.
3054     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
3055     echo iankelling.org > /etc/mailname
3056
3057
3058     # mail.iankelling.org so local imap clients can connect with tls and
3059     # when they happen to not be local.
3060     # todo: this should be 10.8.0.4
3061
3062     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3063 # note: i put nn.b8.nz into bind for good measure
3064 10.173.8.2 nn.b8.nz mx.iankelling.org
3065 EOF
3066
3067     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
3068     # weve configured this file in dnsmasq if we are using it.
3069     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
3070 server=/mx.iankelling.org/127.0.1.1
3071 EOF
3072     # I used to use debconf-set-selections + dpkg-reconfigure,
3073     # which then updates this file
3074     # but the process is slower than updating it directly and then I want to set other things in
3075     # update-exim4.conf.conf, so there's no point.
3076     # The file is documented in man update-exim4.conf,
3077     # except the man page is not perfect, read the bash script to be sure about things.
3078
3079     # The debconf questions output is additional documentation that is not
3080     # easily accessible, but super long, along with the initial default comment in this
3081     # file, so I've saved that into ./mail-notes.conf.
3082     #
3083     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
3084     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3085 # man page: is used to build the local_domains list, together with "localhost"
3086 # this is duplicated in a later router.
3087 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
3088 dc_relay_nets='defaultnn.b8.nz'
3089 EOF
3090
3091
3092     # dmarc. not used currently
3093     f=/etc/cron.daily/refresh-dmarc-tld-file
3094     cat >$f <<'EOF'
3095 #!/bin/bash
3096 cd /etc
3097 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
3098 EOF
3099     m chmod 755 $f
3100
3101     ;;
3102   # ** bk
3103   ## we use this host to monitor MAIL_HOST and host a mail server for someone
3104   bk)
3105
3106
3107     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3108 10.173.8.2 nn.b8.nz
3109 EOF
3110
3111     sed -r -f - /etc/init.d/exim4  <<'EOF' |u /etc/init.d/exim4in
3112 s,/etc/default/exim4,/etc/default/exim4in,g
3113 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
3114 s,(^[ #]*Provides:).*,\1 exim4in,
3115 s,(^[ #]*NAME=).*,\1"exim4in",
3116 EOF
3117     chmod +x /etc/init.d/exim4in
3118     u /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
3119 [Unit]
3120 # needed to continually restart
3121 StartLimitIntervalSec=0
3122
3123 [Service]
3124 Restart=always
3125 # time to sleep before restarting a service
3126 RestartSec=20
3127 EOF
3128
3129     u /etc/default/exim4in <<'EOF'
3130 # defaults but no queue runner and alternate config dir
3131 QUEUERUNNER='no'
3132 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
3133 UPEX4OPTS='-d /etc/myexim4'
3134 EOF
3135
3136     echo bk.b8.nz > /etc/mailname
3137     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3138 # man page: is used to build the local_domains list, together with "localhost"
3139 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
3140 EOF
3141
3142     ;;
3143   # ** je
3144   je)
3145     echo je.b8.nz > /etc/mailname
3146     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3147 dc_other_hostnames='je.b8.nz'
3148 EOF
3149     ;;
3150   # ** not MAIL_HOST|bk|je
3151   *)
3152     # this one should be removed for all non mail hosts, but
3153     # bk and je never become mail_host
3154     echo|u /etc/exim4/conf.d/router/195_dnslookup_vpn
3155     echo|u /etc/exim4/conf.d/router/160_backup_redir
3156     echo|u /etc/exim4/conf.d/router/161_backup_redir_nn
3157     echo|u /etc/exim4/conf.d/router/185_sentarchive
3158     echo|u /etc/exim4/conf.d/router/186_sentarchive_nn
3159     echo|u /etc/exim4/conf.d/router/188_exim4-config_smarthost
3160     echo|u /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
3161     echo|u /etc/exim4/conf.d/rcpt_local_acl
3162     echo|u /etc/exim4/conf.d/main/000_local-nn
3163     echo|u /etc/exim4/conf.d/clamav_data_acl
3164
3165
3166     if $bhost_t; then
3167       cat >>/etc/exim4/conf.d/main/000_local <<EOF
3168 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
3169 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
3170 # so we can maintiain the originals of the backups.
3171 # we wouldnt want this if we were dealing with any other
3172 # local deliveries, but we sent all others to the smarthost
3173 # which then strips the headers.
3174 envelope_to_remove = false
3175 return_path_remove = false
3176 EOF
3177     fi
3178
3179     # catches things like cronjob email
3180     u /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
3181 universal_forward:
3182   driver = redirect
3183   domains = +local_domains
3184   data = alerts@iankelling.org
3185 EOF
3186
3187
3188     for unit in ${nn_progs[@]}; do
3189       f=/etc/systemd/system/$unit.service.d/nn.conf
3190       rm -fv $f
3191     done
3192
3193     # dont i dont care if defaultnn section gets left, it wont
3194     # get used.
3195     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
3196     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
3197
3198     # note: condition duplicated at else
3199     if $bhost_t; then
3200       install -d /bu
3201       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
3202       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
3203         chown -R Debian-exim:Debian-exim /bu/md
3204       fi
3205       u /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
3206 # modified debian maildir transport
3207 backup_maildir:
3208   driver = appendfile
3209   directory = /bu/md
3210   delivery_date_add
3211   # note, no return path or envelope added
3212   maildir_format
3213   directory_mode = 0700
3214   mode = 0644
3215   mode_fail_narrower = false
3216 EOF
3217
3218       u /etc/exim4/conf.d/router/165_backup_local <<'EOF'
3219 ### router/900_exim4-config_local_user
3220 #################################
3221
3222 backup_local:
3223   debug_print = "R: local_user for $local_part@$domain"
3224   driver = accept
3225   domains = eximbackup.b8.nz
3226   transport = backup_maildir
3227 EOF
3228
3229       # Bind to wghole to receive mailbackup.
3230       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
3231       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3232 dc_other_hostnames='eximbackup.b8.nz'
3233 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
3234 EOF
3235
3236       # wghole & thus exim will fail to start without internet connectivity.
3237       u /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
3238 [Unit]
3239 StartLimitIntervalSec=0
3240
3241 [Service]
3242 Restart=always
3243 RestartSec=20
3244 EOF
3245
3246     else  # if $bhost_t; then
3247       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3248 # Note: If theres like a temporary problem where mail gets sent to
3249 # one of these hosts, if exim isnt listening, it will be a temporary error
3250 # instead of a permanent 5xx.
3251 dc_local_interfaces='127.0.0.1;::1'
3252 EOF
3253       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
3254     fi
3255     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3256 dc_eximconfig_configtype='smarthost'
3257 dc_smarthost='$smarthost'
3258 EOF
3259
3260     hostname -f |u /etc/mailname
3261     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3262 # The manpage incorrectly states this will do header rewriting, but
3263 # that only happens if we have dc_hide_mailname is set.
3264 dc_readhost='iankelling.org'
3265 # Only used in case of bounces.
3266 dc_localdelivery='maildir_home'
3267 EOF
3268     ;;
3269 esac
3270
3271
3272
3273
3274 # ** $MAILHOST|bk, things that belong at the end
3275 case $HOSTNAME in
3276   $MAIL_HOST|bk)
3277     # config for the non-nn exim. note, it uses not default dir, but we
3278     # generate that into the default config file
3279     m rsync -ra --delete --delete-excluded \
3280       --exclude=/conf.d/router/161_backup_redir_nn \
3281       --exclude=/conf.d/router/186_sentarchive_nn \
3282       --exclude=/conf.d/main/000_local-nn /etc/exim4/ /etc/myexim4
3283     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3284 # this makes it easier to see which exim is doing what
3285 log_file_path = /var/log/exim4/my%s
3286 EOF
3287
3288
3289
3290     cat >/etc/logrotate.d/myexim <<'EOF'
3291 /var/log/exim4/mymain /var/log/exim4/myreject {
3292         daily
3293         missingok
3294         rotate 1000
3295         delaycompress
3296         notifempty
3297         nocreate
3298 }
3299 /var/log/exim4/mypanic {
3300         size 10M
3301         missingok
3302         rotate 10
3303         compress
3304         delaycompress
3305         notifempty
3306         nocreate
3307 }
3308 EOF
3309
3310     # If we ever wanted to have a separate spool,
3311     # we could do it like this.
3312     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3313     # spool_directory = /var/spool/myexim4
3314     # EOF
3315     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3316 dc_eximconfig_configtype='smarthost'
3317 dc_smarthost='nn.b8.nz'
3318 EOF
3319     ;;&
3320   bk)
3321
3322     # config for the non-nn exim
3323     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3324 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3325 EOF
3326     ;;
3327   $MAIL_HOST)
3328
3329
3330     u /etc/myexim4/conf.d/router/185_sentarchive <<'EOF'
3331 sentarchive:
3332   driver = redirect
3333   domains = ! +local_domains
3334   senders = <; *@fsf.org ; *@posteo.net
3335   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3336   data    = vojdedIdNejyebni@b8.nz
3337   unseen
3338 EOF
3339
3340
3341     u /etc/myexim4/conf.d/router/160_backup_redir <<'EOF'
3342 backup_redir:
3343 driver = redirect
3344 # i dont email myself from my own machine much, so lets ignore that.
3345 domains = ! +local_domains
3346 senders = <; *@fsf.org ; *@posteo.net
3347 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3348 # b is just an arbirary short string
3349 data = b@eximbackup.b8.nz
3350 # note, to test this, i could temporarily allow testignore.
3351 # alerts avoids potential mail loop.
3352 local_parts = ! root : ! testignore : ! alerts : ! daylert
3353 unseen = true
3354 errors_to = alerts@iankelling.org
3355 EOF
3356
3357
3358
3359     # for bk, we have a exim4in.service that will do this for us.
3360     m update-exim4.conf -d /etc/myexim4
3361     ;;
3362 esac
3363
3364 # * spool dir setup
3365
3366 # ** bind mount setup
3367 # put spool dir in directory that spans multiple distros.
3368 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3369 #
3370 dir=/nocow/exim4
3371 sdir=/var/spool/exim4
3372 # we only do this if our system has $dir
3373
3374 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3375 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3376 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3377 # so, im trying a bind mount to get rid of that.
3378 if [[ -e /nocow ]]; then
3379   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3380     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3381   fi
3382   u /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3383 [Unit]
3384 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3385 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3386 After=local-fs.target
3387
3388 [Service]
3389 ExecStartPre=/usr/local/bin/exim-nn-iptables
3390 EOF
3391   if ! mountpoint -q $sdir; then
3392     stopifactive exim4 exim4in
3393     if [[ -L $sdir ]]; then
3394       m rm $sdir
3395     fi
3396     if [[ ! -e $dir && -d $sdir ]]; then
3397       m mv $sdir $dir
3398     fi
3399     if [[ ! -d $sdir ]]; then
3400       m mkdir $sdir
3401       m chmod 000 $sdir # only want it to be used when its mounted
3402     fi
3403     m mount $sdir
3404   fi
3405 fi
3406
3407
3408
3409 # ** exim/spool uid setup
3410 # i have the spool directory be common to distro multi-boot, so
3411 # we need the uid to be the same. 608 cuz it's kind of in the middle
3412 # of the free system uids.
3413 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3414 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3415 if [[ ! $uid ]]; then
3416   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3417   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3418     --no-create-home --disabled-login --force-badname Debian-exim
3419 elif [[ $uid != 608 ]]; then
3420   stopifactive exim4 exim4in
3421   m usermod -u 608 Debian-exim
3422   m groupmod -g 608 Debian-exim
3423   m usermod -g 608 Debian-exim
3424   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3425   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3426 fi
3427
3428 # * start / stop services
3429
3430 reifactive dnsmasq nscd
3431
3432 if $reload; then
3433   m systemctl daemon-reload
3434 fi
3435
3436 # optimization, this only needs to run once.
3437 if [[ ! -e /sys/class/net/wghole ]]; then
3438   # checking bhost_t is redundant, but could help us catch errors.
3439   if $bhost_t || [[ -e /etc/wireguard/wghole.conf ]]; then
3440     # todo: in mail-setup, we have a static list of backup hosts, not *y
3441     m systemctl --now enable wg-quick@wghole
3442   fi
3443 fi
3444
3445 # optimization, this only needs to be run once
3446 if [[ ! -e /var/lib/prometheus/node-exporter/exim_paniclog.prom ]]; then
3447   sysd-prom-fail-install epanicclean
3448   m systemctl --now enable epanicclean
3449 fi
3450
3451 case $HOSTNAME in
3452   je)
3453     /a/exe/web-conf apache2 je.b8.nz
3454     ;;
3455   bk)
3456     /a/exe/web-conf apache2 mail2.iankelling.org
3457     ;;
3458 esac
3459
3460 # optimization, this only needs to run once.
3461 if [[ ! -e /etc/exim4/fullchain.pem ]]; then
3462   m /a/bin/ds/mail-cert-cron -1
3463   m systemctl --now enable mailcert.timer
3464 fi
3465
3466 case $HOSTNAME in
3467   $MAIL_HOST|bk)
3468     m systemctl --now enable mailnn mailnnroute
3469     ;;&
3470   $MAIL_HOST)
3471     # we use dns to start wg
3472     if $reload; then
3473       sre unbound
3474     else
3475       m systemctl --now enable unbound
3476     fi
3477     ;;&
3478   $MAIL_HOST|bk)
3479     # If these have changes, id rather manually restart it, id rather
3480     # not restart and cause temporary errors
3481     if $reload; then
3482       sre $vpnser
3483     else
3484       m systemctl --now enable $vpnser
3485     fi
3486     if ! systemctl is-active clamav-daemon >/dev/null; then
3487       m systemctl --now enable clamav-daemon
3488       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3489       if [[ $out ]]; then
3490         reload=true
3491       fi
3492
3493       # note, this will cause paniclog entries because it takes like 45
3494       # seconds for clamav to start, i use ./epanic-clean to remove
3495       # them.
3496     fi
3497     ;;&
3498   $MAIL_HOST|bk|je)
3499     # start spamassassin/dovecot before exim.
3500     sre dovecot spamassassin
3501     # Wait a bit before restarting exim, else I get a paniclog entry
3502     # like: spam acl condition: all spamd servers failed. But I'm tired
3503     # of waiting. I'll deal with this some other way.
3504     #
3505     # sleep 3
3506     m systemctl --now enable mailclean.timer
3507     ;;&
3508   $MAIL_HOST)
3509     # < 2.1 (eg: in t9), uses a different data format which required manual
3510     # migration. dont start if we are running an old version.
3511     if dpkg --compare-versions "$(dpkg -s radicale | awk '$1 == "Version:" { print $2 }')" ge 2.1; then
3512       m systemctl --now enable radicale
3513     fi
3514     ;;&
3515 esac
3516
3517 # for debugging dns issues
3518 case $HOSTNAME in
3519   je|bk)
3520     systemctl enable --now logrotate-fast.timer
3521     ;;
3522 esac
3523
3524 # last use of $reload happens in previous block
3525 rm -f /var/local/mail-setup-reload
3526
3527
3528 case $HOSTNAME in
3529   $MAIL_HOST|bk|je|li)
3530     # on li, these are never started, except $vpnser
3531     :
3532     ;;
3533   *)
3534     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3535     ;;
3536 esac
3537
3538 sre exim4
3539
3540 case $HOSTNAME in
3541   $MAIL_HOST)
3542     m systemctl --now enable mailbindwatchdog
3543     ;;
3544   *)
3545     soff mailbindwatchdog
3546     ;;
3547 esac
3548
3549
3550 case $HOSTNAME in
3551   bk) sre exim4in ;;
3552 esac
3553
3554 # * mail monitoring / testing
3555
3556 # note, to test clamav, send an email with body that only contains
3557 # https://en.wikipedia.org/wiki/EICAR_test_file
3558 # which set malware_name to Eicar-Signature
3559 case $HOSTNAME in
3560   $MAIL_HOST|bk|je)
3561     # note: cronjob "ian" also does some important monitoring
3562     # todo: this will sometimes cause an alert because mailtest-check will run
3563     # before we have setup network namespace and spamassassin
3564     u /etc/cron.d/mailtest <<EOF
3565 SHELL=/bin/bash
3566 PATH=/usr/bin:/bin:/usr/local/bin
3567 MAILTO=daylert@iankelling.org
3568 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3569 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3570 # if a bounce happened yesterday, dont let it slip through the cracks
3571 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3572 EOF
3573
3574
3575     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3576       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3577     u /etc/systemd/system/mailtest-check.service <<'EOF'
3578 [Unit]
3579 Description=mailtest-check
3580 After=local-fs.target
3581 StartLimitIntervalSec=0
3582
3583 [Service]
3584 Type=simple
3585 ExecStart=/usr/local/bin/mailtest-check slow
3586 Restart=always
3587 RestartSec=60
3588
3589 [Install]
3590 WantedBy=graphical.target
3591 EOF
3592     sysd-prom-fail-install mailtest-check
3593     sre mailtest-check
3594     ;;&
3595   $MAIL_HOST)
3596     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3597     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3598
3599     cat >>/etc/cron.d/mailtest <<EOF
3600 # 10 am friday
3601 0   10 * * 5  root echo "weekly alert. You are not in the matrix."
3602 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3603 EOF
3604     ;;&
3605   bk)
3606     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3607     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3608     # We dont need to send from different addresses to the same
3609     # address. this breaks down our nice elegant logic of building up
3610     # froms and tos , so I just handle expertpath in a special case
3611     # below and set the to: to be testignore@zroe.org.  If we did sent
3612     # that way, it would also mess up our mailtest-check logic that
3613     # finds which messages to check.
3614     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3615     # that would become 2 messages and we'd only check 1.
3616     ;;&
3617   je)
3618     test_froms=(testignore@je.b8.nz)
3619     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3620     ;;&
3621   $MAIL_HOST|bk|je)
3622
3623     # Dont put these test messages into the sent folder or else it will
3624     # overwhelm it, plus i dont want to save a copy at all.
3625     # Plus addresses we generally want to ignore.
3626     u /etc/exim4/ignore-sent <<EOF
3627 $(printf "%s\n" ${test_tos[@]})
3628 vojdedIdNejyebni@b8.nz
3629 b@eximbackup.b8.nz
3630 EOF
3631
3632     cat >/usr/local/bin/send-test-forward <<'EOF'
3633 #!/bin/bash
3634 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3635 olds=(
3636 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3637 )
3638 if (( ${#olds[@]} )); then
3639   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3640 fi
3641 EOF
3642     for test_from in ${test_froms[@]}; do
3643
3644       test_to=${test_tos[0]}
3645       for t in ${test_tos[@]:1}; do
3646         test_to+=", $t"
3647       done
3648       case $test_from in
3649         testignore@expertpathologyreview.com)
3650           test_to=testignore@zroe.org
3651           ;;
3652       esac
3653
3654       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3655 /usr/sbin/exim -odf -f $test_from -t <<EOF
3656 From: $test_from
3657 To: $test_to
3658 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3659
3660 /usr/local/bin/send-test-forward
3661 EOF
3662 EOFOUTER
3663     done
3664     m chmod +x /usr/local/bin/send-test-forward
3665     ;;
3666   *)
3667     soff mailtest-check.service
3668     rm -fv /etc/cron.d/mailtest \
3669        /var/lib/prometheus/node-exporter/mailtest-check.prom* \
3670        /var/local/cron-errors/check-remote-mailqs*
3671     ;;
3672 esac
3673
3674
3675
3676 # * misc
3677 m sudo -u $u mkdir -p /home/$u/.cache
3678 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3679 while (($#)); do
3680   target=$1
3681   f=$2
3682   shift 2
3683   if [[ ! -L $f ]]; then
3684     if [[ -e $f ]]; then
3685       rm -rf $f
3686     fi
3687     m sudo -u $u ln -sf -T $target $f
3688   fi
3689 done
3690
3691
3692 # /etc/alias setup is debian specific, and exim postinst script sets up
3693 # an /etc/alias from root to the postmaster, based on the question
3694 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3695 # root, or there was no preexisting aliases file. postfix won\'t set up
3696 # a root to $postmaster alias if it\'s already installed. Easiest to
3697 # just set it ourselves.
3698
3699 # debconf question for postmaster:
3700 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3701 # to the user account of the actual system administrator.
3702 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3703 # recommended.
3704 # Note that postmaster\'s mail should be read on the system to which it is directed,
3705 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3706 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3707 # force local delivery.
3708 # Multiple user names need to be separated by spaces.
3709 # Root and postmaster mail recipient:
3710
3711 m exit 0
3712 :
3713
3714 # Local Variables:
3715 # eval: (outline-minor-mode)
3716 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3717 # End:
3718 # this is combined with defining outline-level in init.el