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