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