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