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: sandbox / harden exim:
   7 #  1. stop it from running as root. how?
   8 #  https://www.exim.org/exim-html-current/doc/html/spec_html/ch-security_considerations.html
   9 #  * avoid using .forward files, remove that router
  10 #  * set deliver_drop_privilege
  11 #  * set user to run as Debian-exim in systemd
  12 #  * set port to something like 2500, and forward 25 to 2500 with iptables. same for 587.
  13 #  https://superuser.com/questions/710253/allow-non-root-process-to-bind-to-port-80-and-443/1334552#1334552
  14 #  * consider whether other routers like postmaster need modification / removal.
  15 #  2. restrict its filesystem access from within systemd
  16
  17 #  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.
  18 #  todo: consider hardening cups listening on 0.0.0.0
  19 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  20 #  todo: check that spamd and unbound only listen locally.
  21
  22 # todo:  hosts should only allow external mail that is authed and
  23 # destined for backup route. it is a minor issue since traffic is
  24 # limited to the wghole network.
  25
  26 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  27 # instead of a simple rejection like it should.
  28
  29 # todo: auto restart of je on checkrestart
  30
  31 # todo: run mailping test after running, or otherwise
  32 # clear out terminal alert
  33
  34 # todo: reinstall bk with bigger filesystem
  35
  36 # todo: on bk, dont send email if mailvpn is not up
  37
  38 # todo: mailtest-check should check on bk too
  39
  40 # todo: disable postgrey
  41
  42 # todo: in testforward-check, we should also look
  43
  44 # todo: test that bounces dont help create valid mailtest-check
  45
  46 # todo: move mail stuff in distro-end into this file
  47
  48 # todo: consider rotating dkim & publishing key so every past email I sent
  49 # isnt necessarily signed
  50
  51 # todo: consider how to get clamav out of Debian-exim group
  52 # so it cant read/write the whole mail spool, for better
  53 # security.
  54
  55 # todo: create a cronjob to update or warn on expiring dnssec keys
  56
  57 # todo: we should test failed mail daily or so
  58 # failed cronjob, failed sysd-log-once,
  59 # a local bounce from a cronjob, a local bounce
  60 # to a bad remote address, perhaps a local failure
  61 # when the sending daemon is down.
  62 # And send an alert email if no alerts have been sent
  63 # in 2 or 3 days or something. todo, test cron mail on li.
  64
  65 # todo: look at mailinabox extra dns records, note these changelogs:
  66 # - 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.
  67 # - 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.
  68 #
  69
  70 # todo: mailtest-check failure on remote hosts is not going to alert me.
  71 # sort that out.
  72 # todo: test mail failure as well as success.
  73 #
  74 # todo: validate that mailtest-check is doing dnsbl checks.
  75
  76 # background: I want to run exim in a network namespace so it can send
  77 # and receive through a vpn. This is needed so it can do ipv6, because
  78 # outside the namespace if we dont have ipv6, to send ipv6 through the
  79 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  80 # long time, it was fine, but it causes various pains, like increased
  81 # latency, increased recaptcha because my ip is from a data center, just
  82 # various issues I dont want on all the time. The problem with the
  83 # namespace is that all kinds of programs want to invoke exim, but they
  84 # wont be in the namespace. I could replace exim with a wrapper that
  85 # jumps into the namespace, i tried that, it works fine.  One remaining
  86 # problem was that I would have needed to hook into exim upgrades to
  87 # move exim and replace it with my wrapper script. Also, my script to
  88 # join the namespace is not super reliable because it uses a pgrep.
  89 # Instead, I should have created a systemd service for a process that
  90 # will never die and just writes its pid somewhere convenient.
  91 # That implementation
  92 # is below here:
  93 #
  94 # sudoers:
  95 # user ALL=(ALL) /usr/sbin/exim4
  96 #
  97 # move exim4 to eximian, use this script for exim4:
  98 #
  99 # #!/bin/bash
 100 # if ip a show veth1-mail &>/dev/null; then
 101 #   /usr/sbin/eximian "$@"
 102 #   exit
 103 # fi
 104 # dosudo=false
 105 # if [[ $USER && $USER != root ]]; then
 106 #   dosudo=true
 107 # fi
 108 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 109 # if $dosudo; then
 110 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 111 # else
 112 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 113 # fi
 114 # ## end script
 115 #
 116 # an alternate solution: there is a small setguid program for
 117 # network namespaces in my bookmarks.
 118 #
 119 # However, the solution I went with is: have 2 exim
 120 # configs. A nonstandard location for the daemon that runs
 121 # in the namespace. For all other invocations, it uses
 122 # the default config location, which is altered to be
 123 # in a smarthost config which sends mail to the deaemon.
 124 #
 125 # I have a bash function, enn to invoke exim like the daemon is running.
 126 # and mailbash to just enter its network namespace.
 127
 128 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 129
 130 shopt -s nullglob
 131
 132 if [[ -s /usr/local/lib/err ]]; then
 133   source /usr/local/lib/err
 134 elif [[ -s /a/bin/errhandle/err ]]; then
 135   source /a/bin/errhandle/err
 136 else
 137   err "no err tracing script found"
 138 fi
 139 source /a/bin/distro-functions/src/identify-distros
 140 source /a/bin/distro-functions/src/package-manager-abstractions
 141
 142 # has nextcloud_admin_pass in it
 143 f=/p/c/machine_specific/$HOSTNAME/mail
 144 if [[ -e $f ]]; then
 145   # shellcheck source=/p/c/machine_specific/bk/mail
 146   source $f
 147 fi
 148
 149
 150 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 151
 152
 153 u=$(id -nu 1000)
 154
 155
 156 usage() {
 157   cat <<EOF
 158 Usage: ${0##*/} anything_here_to_debug
 159 Setup exim4 & dovecot & related things
 160
 161 -h|--help  Print help and exit.
 162 EOF
 163   exit $1
 164 }
 165
 166 # debug output if we pass any arg
 167 if (( $# )); then
 168   set -x
 169 fi
 170
 171
 172 ####### instructions for icedove #####
 173 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 174 # then click advanced so it accepts it.
 175 # we could also just use 127.0.0.1 with no ssl
 176 #
 177 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 178 # background: dovecot does not yet have ocsp stapling support
 179 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 180 #
 181 # for phone, k9mail, same thing but username alerts, pass in ivy-pass.
 182 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 183 # fetching mail settings: folder poll frequency 10 minutes
 184 #######
 185
 186
 187 # * perstent password instructions
 188 # Note: for cert cron, we need to manually run first to accept known_hosts
 189
 190 # # exim passwords:
 191 # # for hosts which have all private files I just use the same user
 192 # # for other hosts, each one get\'s their own password.
 193 # # for generating secure pass, and storing for server too:
 194 # f=$(mktemp)
 195 # host=tp
 196 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 197 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 198 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 199 # #reference: exim4_passwd_client(5)
 200 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 201 # mkdir -p $dir
 202 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 203 # # then run this script
 204
 205 # # dovecot password, i just need 1 as I\'m the only user
 206 # mkdir /p/c/filesystem/etc/dovecot
 207 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 208
 209 ####### end perstent password instructions ######
 210
 211
 212 # * dkim dns
 213 # # Remove 1 level of comments in this section, set the domain var
 214 # # for the domain you are setting up, then run this and copy dns settings
 215 # # into dns.
 216 # domain=iankelling.org
 217 # c /p/c/filesystem/etc/exim4
 218 # # this has several bugs addressed in comments, but it was helpful
 219 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 220
 221 # openssl genrsa -out $domain-private.pem 2048
 222 # # Then, to get the public key strings to put in bind:
 223
 224 # # selector is needed for having multiple keys for one domain.
 225 # # I dun do that, so just use a static one: li
 226 # # Debadmin page does not have v=, fastmail does, and this
 227 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 228 # # https://www.ietf.org/rfc/rfc6376.txt
 229 # # Join and print all but first and last line.
 230 # # last line: swap hold & pattern, remove newlines, print.
 231 # # lines 2+: append to hold space
 232 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 233 # cat <<EOF
 234 # a._domainkey.$domain  TXT     (
 235 # "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')" )
 236 # EOF
 237 # # sed explanation: skip the first few lines, then put them into the hold space, then
 238 # # on the last line, back to the patern space, remove the newlines, then add a newline
 239 # # at the last char - 240, because bind txt records need strings <=255 chars,
 240 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 241 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 242
 243 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 244
 245 # * dmarc dns
 246
 247 # # 2017-02 dmarc policies:
 248 # # host -t txt _dmarc.gmail.com
 249 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 250 # # there were articles claiming gmail would be  changing
 251 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 252 # # expected to cause problems
 253 # # with a few old mailing lists, copying theirs for now.
 254 #
 255 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 256
 257 # * other dns
 258
 259 # # 2017-02 spf policies:
 260 # # host -t txt lists.fedoraproject.org
 261 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 262 # # i include fastmail\'s settings, per their instructions,
 263 # # and follow their policy. In mail in a box, or similar instructions,
 264 # # I\'ve seen recommended to not use a restrictive policy.
 265
 266 # # to check if dns has updated, you do
 267 # host -a mesmtp._domainkey.$domain
 268
 269 # # mx records,
 270 # # setting it to iankelling.org would work the same, but this
 271 # # is more flexible, I could change where mail.iankelling.org pointed.
 272 # cat <<'EOF'
 273 # mx records, 2 records each, for * and empty domain
 274 # pri 10 mail.iankelling.org
 275 # EOF
 276
 277 # # dnssec
 278 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 279
 280 # * functions & constants
 281
 282 pre="${0##*/}:"
 283 m() { printf "$pre %s\n"  "$*"; "$@"; }
 284 e() { printf "$pre %s\n"  "$*"; }
 285 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 286
 287 reload=false
 288 # This file is so if we fail in the middle and rerun, we dont lose state
 289 if [[ -e /var/local/mail-setup-reload ]]; then
 290   reload=true
 291 fi
 292 i() { # install file
 293   local tmp tmpdir dest="$1"
 294   local base="${dest##*/}"
 295   mkdir -p ${dest%/*}
 296   ir=false # i result
 297   tmpdir=$(mktemp -d)
 298   cat >$tmpdir/"$base"
 299   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 300   if [[ $tmp ]]; then
 301     printf "%s\n" "$tmp"
 302     ir=true
 303     if [[ $dest == /etc/systemd/system/* ]]; then
 304       touch /var/local/mail-setup-reload
 305       reload=true
 306     fi
 307   fi
 308   rm -rf $tmpdir
 309 }
 310 setini() {
 311   key="$1" value="$2" section="$3"
 312   file="/etc/radicale/config"
 313   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 314 }
 315 soff () {
 316   for service; do
 317     # ignore services that dont exist
 318     if systemctl cat $service &>/dev/null; then
 319       m systemctl disable --now $service
 320     fi
 321   done
 322 }
 323 sre() {
 324   for service; do
 325     m systemctl restart $service
 326     m systemctl enable $service;
 327   done
 328 }
 329 mailhost() {
 330   [[ $HOSTNAME == "$MAIL_HOST" ]]
 331 }
 332 e() { printf "%s\n" "$*"; }
 333 reifactive() {
 334   for service; do
 335     if systemctl is-active $service >/dev/null; then
 336       m systemctl restart $service
 337     fi
 338   done
 339 }
 340 stopifactive() {
 341   for service; do
 342     if systemctl is-active $service >/dev/null; then
 343       m systemctl stop $service
 344     fi
 345   done
 346 }
 347
 348 mxhost=mx.iankelling.org
 349 mxport=587
 350 forward=$u@$mxhost
 351
 352 # old setup. left as comment for example
 353 # mxhost=mail.messagingengine.com
 354 # mxport=587
 355 # forward=ian@iankelling.org
 356
 357 smarthost="$mxhost::$mxport"
 358 uhome=$(eval echo ~$u)
 359
 360 # Somehow on one machine, a file got written with 664 perms.
 361 # just being defensive here.
 362 umask 0022
 363
 364 source /a/bin/bash_unpublished/source-state
 365 if [[ ! $MAIL_HOST ]]; then
 366   err "\$MAIL_HOST not set"
 367 fi
 368
 369 bhost_t=false
 370 case $HOSTNAME in
 371   $MAIL_HOST) : ;;
 372   kd|frodo|x2|x3|kw|sy)
 373     bhost_t=true
 374     ;;
 375 esac
 376
 377
 378 # * Install universal packages
 379
 380
 381 # installs epanicclean
 382 /a/bin/ds/install-my-scripts
 383
 384 if [[ $(debian-codename-compat) == bionic ]]; then
 385   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 386 Package: spamassassin sa-compile spamc
 387 Pin: release n=focal,o=Ubuntu
 388 Pin-Priority: 500
 389 EOF
 390 fi
 391
 392 # light version of exim does not have sasl auth support.
 393 pi-nostart exim4 exim4-daemon-heavy spamassassin openvpn unbound clamav-daemon wireguard
 394
 395 # note: pyzor debian readme says you need to run some initialization command
 396 # but its outdated.
 397 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot
 398 # bad packages that sometimes get automatically installed
 399 pu openresolv resolvconf
 400
 401 soff openvpn
 402
 403
 404 if [[ $(debian-codename) == etiona ]]; then
 405   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 406   # so running iptables as part of openvpn startup wont work. This should do it.
 407   pi iptables-persistent
 408   cat >/etc/iptables/rules.v6 <<'EOF'
 409 *mangle
 410 COMMIT
 411 *nat
 412 COMMIT
 413 EOF
 414   # load it now.
 415   m ip6tables -S >/dev/null
 416 fi
 417
 418 # our nostart pi fails to avoid enabling
 419
 420
 421 # * user forward file
 422 case $HOSTNAME in
 423   $MAIL_HOST)
 424     # afaik, these will get ignored on MAIL_HOST because they are routing to my own
 425     # machine, but rm them is safer
 426     rm -fv $uhome/.forward /root/.forward
 427     ;;
 428   *)
 429     # this can\'t be a symlink and has permission restrictions
 430     # it might work in /etc/aliases, but this seems more proper.
 431     e setting $uhome/.forward to $forward
 432     install -m 644 {-o,-g}$u <(e $forward) $uhome/.forward
 433     ;;
 434 esac
 435
 436 # * Mail clean cronjob
 437
 438 i /etc/systemd/system/mailclean.timer <<'EOF'
 439 [Unit]
 440 Description=Run mailclean daily
 441
 442 [Timer]
 443 OnCalendar=monthly
 444
 445 [Install]
 446 WantedBy=timers.target
 447 EOF
 448
 449 i /etc/systemd/system/mailclean.service <<EOF
 450 [Unit]
 451 Description=Delete and archive old mail files
 452 After=multi-user.target
 453
 454 [Service]
 455 User=$u
 456 Type=oneshot
 457 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 458 EOF
 459
 460 # * postgrey
 461
 462
 463 i /etc/default/postgrey <<'EOF'
 464 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 465 EOF
 466
 467 # * clamav
 468
 469 m usermod -a -G Debian-exim clamav
 470
 471 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 472 [Service]
 473 ExecStartPre=-/bin/mkdir /var/run/clamav
 474 ExecStartPre=/bin/chown clamav /var/run/clamav
 475 EOF
 476
 477 # * mail vpn config
 478
 479 # old.
 480 #vpnser=mailvpn.service
 481 # todo: this hangs if it cant resolv the endpoint. we
 482 # want it to just retry in the background.
 483 vpnser=wg-quick@wgmail.service
 484
 485 case $HOSTNAME in
 486   $MAIL_HOST)
 487     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 488     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 489     ;;&
 490   bk)
 491     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 492     ;;&
 493   *)
 494     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 495     if [[ -d $d ]]; then
 496       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 497     fi
 498     ;;
 499 esac
 500
 501 i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 502 [Unit]
 503 Requires=mailnn.service
 504 After=network.target mailnn.service
 505 JoinsNamespaceOf=mailnn.service
 506 BindsTo=mailnn.service
 507
 508 [Service]
 509 PrivateNetwork=true
 510 # i dont think we need any of these, but it doesnt hurt to stay consistent
 511 BindPaths=$bindpaths
 512 EOF
 513
 514 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 515 i /etc/systemd/system/mailvpn.service <<EOF
 516 [Unit]
 517 Description=OpenVPN tunnel for mail
 518 After=syslog.target network-online.target mailnn.service
 519 Wants=network-online.target
 520 Documentation=man:openvpn(8)
 521 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 522 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 523 # needed to continually restatr
 524 JoinsNamespaceOf=mailnn.service
 525 BindsTo=mailnn.service
 526 StartLimitIntervalSec=0
 527
 528 [Service]
 529 Type=notify
 530 RuntimeDirectory=openvpn-client
 531 RuntimeDirectoryMode=0710
 532 WorkingDirectory=/etc/openvpn/client
 533 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 534 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 535 LimitNPROC=10
 536 # DeviceAllow=/dev/null rw
 537 # DeviceAllow=/dev/net/tun rw
 538 PrivateNetwork=true
 539 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 540 # because of
 541 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 542 # there is a workaround there, but i dont think its really worth it,
 543 # the mail server is fine with a static dns anyways.
 544 # This thread is also interesting,
 545 # https://github.com/slingamn/namespaced-openvpn/issues/7
 546 # todo: the iptables rule at the bottom could be useful to prevent
 547 # dns from leaking in my network namespaced vpn.
 548 # I also like the idea of patching systemd-resolved so it
 549 # will listen on other interfaces, but its not worth my time.
 550 BindPaths=$bindpaths
 551 Restart=always
 552 # time to sleep before restarting a service
 553 RestartSec=1
 554
 555 [Install]
 556 WantedBy=multi-user.target
 557 EOF
 558
 559 i /etc/systemd/system/mailnnroute.service <<'EOF'
 560 [Unit]
 561 Description=Network routing for mailnn
 562 After=syslog.target network-online.target mailnn.service
 563 Wants=network-online.target
 564 JoinsNamespaceOf=mailnn.service
 565 BindsTo=mailnn.service
 566 StartLimitIntervalSec=0
 567
 568 [Service]
 569 Type=simple
 570 RemainAfterExit=true
 571 PrivateNetwork=true
 572 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 573 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 574 Restart=always
 575 RestartSec=10
 576
 577
 578 [Install]
 579 WantedBy=multi-user.target
 580 EOF
 581
 582 #
 583 i /etc/systemd/system/mailnn.service <<'EOF'
 584 [Unit]
 585 Description=Network Namespace for mail vpn service that will live forever and cant fail
 586 After=syslog.target network-online.target
 587 Wants=network-online.target
 588
 589 [Service]
 590 Type=simple
 591 PrivateNetwork=true
 592 ExecStart=/bin/sleep infinity
 593
 594 [Install]
 595 WantedBy=multi-user.target
 596 EOF
 597
 598 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 599 [Unit]
 600 Description=Watchdog to restart services relying on systemd-resolved dir
 601 After=syslog.target network-online.target
 602 Wants=network-online.target
 603 BindsTo=mailnn.service
 604
 605 [Service]
 606 Type=simple
 607 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 608 Restart=always
 609 # time to sleep before restarting a service
 610 RestartSec=1
 611
 612 [Install]
 613 WantedBy=multi-user.target
 614 EOF
 615
 616
 617
 618 # old service name
 619 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 620
 621 # We use a local unbound because systemd-resolved wont accept our
 622 # request, it will only listen to 127.0.0.53 in the main network
 623 # namespace, and rejected feature requests to change that (although I
 624 # could change the code and recompile), but anyways, that could answer
 625 # with things specific to the lan that aren't applicable in this
 626 # namespace, and since unbound is a recursive resolver, it means we just
 627 # use our own ip against dnsbl rate limits.
 628 #
 629 # If we ever notice this change, chattr +i on it
 630 # trust-ad is used in t10+, glibc 2.31
 631
 632 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 633 nameserver 127.0.0.1
 634 options edns0 trust-ad
 635 EOF
 636
 637 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 638 nameserver 127.0.0.53
 639 options edns0 trust-ad
 640 EOF
 641
 642
 643 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 644 nameserver 10.173.8.1
 645 options edns0 trust-ad
 646 EOF
 647
 648 # this is just a bug fix for trisquel.
 649 f=/etc/apparmor.d/usr.sbin.unbound
 650 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 651 if ! grep -qFx "$line" $f; then
 652   badline="/usr/sbin/unbound {"
 653   if ! grep -qFx "$badline" $f; then
 654     err expected line in $f not found
 655   fi
 656   sed -i "s,^$badline$,$line," $f
 657   if systemctl is-active apparmor &>/dev/null; then
 658     m systemctl reload apparmor
 659   fi
 660 fi
 661
 662 # note: anything added to nn_progs needs corresponding rm
 663 # down below in the host switch
 664 nn_progs=(exim4)
 665 if mailhost; then
 666   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 667   # Its in the nn so remote clients can connect to it.
 668   nn_progs+=(spamassassin dovecot)
 669 fi
 670
 671 case $HOSTNAME in
 672   $MAIL_HOST)
 673     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 674 [Unit]
 675 After=mailnn.service
 676 JoinsNamespaceOf=mailnn.service
 677 BindsTo=mailnn.service
 678 StartLimitIntervalSec=0
 679
 680 [Service]
 681 PrivateNetwork=true
 682 # note the nsswitch bind is actually not needed for bk, but
 683 # its the same file so it does no harm.
 684 BindPaths=$bindpaths
 685
 686 Restart=always
 687 RestartSec=1
 688 EOF
 689
 690     # sooo, there are a few ways to get traffic from the mail network
 691     # namespace to go over the wghole.
 692     #
 693     #1: unify the mail vpn and wghole
 694     # into 1 network.  this seems simple and logical, so I'm doing it.
 695     # One general downside is tying things together, if I need to mess
 696     # with one thing, it breaks the other. Oh well for now.
 697     #
 698     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 699     #
 700     # 3. We can setup the routing to happen on li, which seemed like I
 701     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 702     # wghole clients, but I think that is kind of hacky and breaks ipv4
 703     # routing within the mailvpn, it happened to work just because exim
 704     # prefers ipv6 and that was also available in the mailvpn.
 705     #
 706     # 4. Put the hole interface into the mail network namespace. This
 707     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 708     # vpn routing and establishes a direct connection.  I only use the
 709     # hole vpn for randomish things, it should be fine to join the mail
 710     # nn for that. There should be some way to fix the routing issue
 711     # by doing manual routing, but that doesn't seem like a good use of time.
 712     # relevant:
 713     # https://www.wireguard.com/netns/#
 714     #
 715     # for wireguard debugging
 716     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 717     # dmesg -w
 718
 719     ;;&
 720   $MAIL_HOST|bk)
 721     for unit in ${nn_progs[@]}; do
 722       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 723 [Unit]
 724 # commented for old openvpn
 725 Requires=$vpnser
 726 After=network.target mailnn.service $vpnser
 727 JoinsNamespaceOf=mailnn.service
 728 BindsTo=mailnn.service
 729 StartLimitIntervalSec=0
 730
 731 [Service]
 732 PrivateNetwork=true
 733 # note the nsswitch bind is actually not needed for bk, but
 734 # its the same file so it does no harm.
 735 BindPaths=$bindpaths
 736
 737 Restart=always
 738 RestartSec=1
 739 EOF
 740     done
 741     ;;
 742   *)
 743     for unit in exim4 spamassassin dovecot unbound; do
 744       f=/etc/systemd/system/$unit.service.d/nn.conf
 745       if [[ -s $f ]]; then
 746         rm -fv $f
 747         reload=true
 748       fi
 749     done
 750     ;;
 751 esac
 752
 753 # * spamassassin config
 754 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 755 # see exim spec
 756 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 757 EOF
 758 if $ir; then
 759   m sysctl -p
 760 fi
 761
 762 i /etc/spamassassin/mylocal.cf <<'EOF'
 763 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 764
 765 # /usr/share/doc/exim4-base/README.Debian.gz:
 766 #   SpamAssassin's default report should not be used in a add_header
 767 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 768 #   warning "BAD HEADER SECTION, Improper folded header field made up
 769 #   entirely of whitespace".) This is a safe, terse alternative:
 770 clear_report_template
 771 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 772 uridnsbl_skip_domain iankelling.org
 773 uridnsbl_skip_domain amnimal.ninja
 774 uridnsbl_skip_domain expertpathologyreview.com
 775 uridnsbl_skip_domain zroe.org
 776 EOF
 777
 778 # 2020-10-19 remove old file. remove this when all hosts updated
 779 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 780
 781 i /etc/default/spamassassin <<'EOF'
 782 # defaults plus debugging flags for an issue im having
 783 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 784 PIDFILE="/var/run/spamd.pid"
 785 # my additions
 786 NICE="--nicelevel 15"
 787 CRON=1
 788 EOF
 789 #####   end spamassassin config
 790
 791
 792 # * Update mail cert
 793 if [[ -e /p/c/filesystem ]]; then
 794   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 795   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 796   # after my internet was down for a bit:
 797   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 798   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 799 fi
 800 case $HOSTNAME in
 801   bk)
 802     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 803       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 804       exit 1
 805     fi
 806     ;;
 807 esac
 808
 809 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 810
 811 i /etc/systemd/system/mailcert.service <<'EOF'
 812 [Unit]
 813 Description=Mail cert rsync
 814 After=multi-user.target
 815
 816 [Service]
 817 Type=oneshot
 818 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 819 EOF
 820 i /etc/systemd/system/mailcert.timer <<'EOF'
 821 [Unit]
 822 Description=Run mail-cert once a day
 823
 824 [Timer]
 825 OnCalendar=daily
 826
 827 [Install]
 828 WantedBy=timers.target
 829 EOF
 830
 831
 832 wghost=${HOSTNAME}wg.b8.nz
 833 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 834   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 835           certonly --manual --preferred-challenges=dns \
 836           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 837           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 838           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 839 fi
 840
 841 # * common exim4 config
 842
 843
 844 # Make all system users be aliases. preventative
 845 # measure for things like cron mail for user without alias
 846 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ { print $1 }' /etc/passwd| while read -r user; do
 847   if [[ ! $user ]]; then
 848     continue
 849   fi
 850   if ! grep -q "^$user:" /etc/aliases; then
 851     echo "$user: root" |m tee -a /etc/aliases
 852   fi
 853 done
 854
 855 if ! grep -q "^ncsoft:" /etc/aliases; then
 856   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
 857 fi
 858
 859
 860
 861 m gpasswd -a iank adm #needed for reading logs
 862
 863 ### make local bounces go to normal maildir
 864 # local mail that bounces goes to /Maildir or /root/Maildir
 865 dirs=(/m/md/bounces/{cur,tmp,new})
 866 m mkdir -p ${dirs[@]}
 867 m chown iank:iank /m /m/md
 868 m ln -sfT /m/md /m/iank
 869 m chmod 771 /m /m/md
 870 m chown -R $u:Debian-exim /m/md/bounces
 871 m chmod 775 ${dirs[@]}
 872 m usermod -a -G Debian-exim $u
 873 for d in /Maildir /root/Maildir; do
 874   if [[ ! -L $d ]]; then
 875     m rm -rf $d
 876   fi
 877   m ln -sf -T /m/md/bounces $d
 878 done
 879
 880 # dkim, client passwd file
 881 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
 882 f=/p/c/filesystem/etc/exim4/passwd.client
 883 if [[ -e $f ]]; then
 884   files+=($f)
 885 fi
 886 if (( ${#files[@]} )); then
 887   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
 888     ${files[@]} /etc/exim4
 889 fi
 890
 891 # by default, only 10 days of logs are kept. increase that.
 892 m sed -ri 's/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
 893
 894
 895 ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
 896 # i only need .forwards, so just doing that one.
 897 cd /etc/exim4/conf.d/router
 898 b=userforward_higher_priority
 899 # replace the router name so it is unique
 900 sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
 901
 902 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
 903
 904 # alerts is basically the postmaster address
 905 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
 906 \$a root: alerts@iankelling.org
 907 /^root:/d
 908 EOF
 909
 910 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
 911 ncsoft@zroe.org graceq2323@gmail.com hE
 912 EOF
 913
 914 # old name
 915 rm -fv /etc/exim4/conf.d/retry/37_retry
 916
 917 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
 918 # Retry fast for my own domains
 919 iankelling.org * F,1d,10m;F,14d,1h
 920 amnimal.ninja * F,1d,10m;F,14d,1h
 921 expertpathologyreview.com * F,1d,10m;F,14d,1h
 922 je.b8.nz * F,1d,10m;F,14d,1h
 923 zroe.org * F,1d,10m;F,14d,1h
 924 eximbackup.b8.nz * F,1d,4m;F,14d,1h
 925 EOF
 926
 927
 928 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
 929 cat >/etc/exim4/conf.d/main/000_local <<EOF
 930 MAIN_TLS_ENABLE = true
 931
 932 # require tls connections for all smarthosts
 933 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
 934
 935 # debian exim config added this in 2016 or so?
 936 # it's part of the smtp spec, to limit lines to 998 chars
 937 # but a fair amount of legit mail does not adhere to it. I don't think
 938 # this should be default, like it says in
 939 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
 940 # todo: the bug for introducing this was about headers, but
 941 # the fix maybe is for all lines? one says gmail rejects, the
 942 # other says gmail does not reject. figure out and open a new bug.
 943 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
 944
 945 # more verbose logs
 946 MAIN_LOG_SELECTOR = +all
 947
 948 # Based on spec, seems like a good idea to be nice.
 949 smtp_return_error_details = true
 950
 951 # normally empty, I set this so I can set the envelope address
 952 # when doing mail redelivery to invoke filters. Also allows
 953 # me exiqgrep and stuff.
 954 MAIN_TRUSTED_GROUPS = $u
 955
 956 # default is 10. when exim has been down for a bit, fsf mailserver
 957 # will do a big send in one connection, then exim decides to put
 958 # the messages in the queue instead of delivering them, to avoid
 959 # spawning too many delivery processes. This is the same as the
 960 # fsfs value. And the corresponding one for how many messages
 961 # to send out in 1 connection remote_max_parallel = 256
 962 smtp_accept_queue_per_connection = 500
 963
 964
 965 DKIM_CANON = relaxed
 966 DKIM_SELECTOR = li
 967
 968 # from comments in
 969 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 970 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
 971 # There could be some circumstance when the
 972 # from: isnt our domain, but the envelope sender is
 973 # and so still want to sign, but I cant think of any case.
 974 DKIM_DOMAIN = \${lc:\${domain:\$rh_from:}}
 975 # The file is based on the outgoing domain-name in the from-header.
 976 # sign if key exists
 977 DKIM_PRIVATE_KEY = \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
 978
 979 # most of the ones that gmail seems to use.
 980 # Exim has horrible default of signing unincluded
 981 # list- headers since they got mentioned in an
 982 # rfc, but this messes up mailing lists, like gnu/debian which want to
 983 # keep your dkim signature intact but add list- headers.
 984 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
 985
 986 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
 987
 988 hostlist iank_trusted = <; \\
 989 # veth0
 990 10.173.8.1 ; \\
 991 # li li_ip6
 992 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \\
 993 # li_vpn_net li_vpn_net_ip6s
 994 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \\
 995 # bk bk_ip6
 996 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \\
 997 # je je_ipv6
 998 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \\
 999 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1000 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1001 EOF
1002
1003 rm -fv /etc/exim4/rcpt_local_acl # old path
1004
1005 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1006 # This acl already exists in rcpt, this just makes it more widespread.
1007 # See the comment there for its rationale. The reason it needs to be
1008 # more widespread is that I've turned on sender verification, but cron
1009 # emails can fail sender verification since I may be in a network that
1010 # doesn't have my local dns.
1011 accept
1012   authenticated = *
1013
1014 # i setup a local programs smtp to mail.iankelling.org, this
1015 # skips sender verification for it.
1016 accept
1017   hosts = 10.173.8.1
1018 EOF
1019
1020 rm -fv /etc/exim4/data_local_acl # old path
1021 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1022 # Except for the "condition =", this was
1023 # a comment in the check_data acl. The comment about this not
1024 # being suitable has been changed in newer exim versions. The only thing
1025 # related I found was to
1026 # add the condition =, cuz spamassassin has problems with big
1027 # messages and spammers don't bother with big messages,
1028 # but I've increased the size from 10k
1029 # suggested in official docs, and 100k in the wiki example because
1030 # those docs are rather old and I see a 110k spam message
1031 # pretty quickly looking through my spam folder.
1032
1033 warn
1034   !hosts = +iank_trusted
1035   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1036
1037 warn
1038   !hosts = +iank_trusted
1039   condition = ${if < {$message_size}{5000K}}
1040   spam = Debian-exim:true
1041   add_header = X-Spam_score_int: $spam_score_int
1042   add_header = X-Spam_score: $spam_score
1043   add_header = X-Spam_bar: $spam_bar
1044   add_header = X-Spam_report: $spam_report
1045   add_header = X-Spam_action: $spam_action
1046
1047 warn
1048   condition = ${if def:malware_name}
1049   remove_header = Subject:
1050   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1051   log_message = heuristic malware warning: $malware_name
1052
1053 #accept
1054 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1055 #  dmarc_status = reject:quarantine
1056 #  add_header = Reply-to: dmarctest@iankelling.org
1057
1058 EOF
1059
1060 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<EOF
1061 ### router/900_exim4-config_local_user
1062 #################################
1063
1064 # This router matches local user mailboxes. If the router fails, the error
1065 # message is "Unknown user".
1066 local_user:
1067   debug_print = "R: local_user for \$local_part@\$domain"
1068   driver = accept
1069   domains = +local_domains
1070 # ian: default file except where mentioned.
1071 # ian: commented this. I get all local parts. for bk, an rcpt
1072 # check handles checking with dovecot, and the only router
1073 # after this is root.
1074 #  local_parts = ! root
1075   transport = LOCAL_DELIVERY
1076   cannot_route_message = Unknown user
1077 # ian: added for + addressing.
1078   local_part_suffix = +*
1079   local_part_suffix_optional
1080 EOF
1081 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1082 dovecot_lmtp:
1083   driver = lmtp
1084   socket = /var/run/dovecot/lmtp
1085   #maximum number of deliveries per batch, default 1
1086   batch_max = 200
1087   envelope_to_add
1088 EOF
1089
1090 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1091 # same as debians 30_exim4-config_remote_smtp, but
1092 # with interface added at the end.
1093
1094 remote_smtp_vpn:
1095   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1096   driver = smtp
1097 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1098   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1099 .endif
1100 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1101   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1102 .endif
1103 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1104   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1105 .endif
1106 .ifdef REMOTE_SMTP_RETURN_PATH
1107   return_path = REMOTE_SMTP_RETURN_PATH
1108 .endif
1109 .ifdef REMOTE_SMTP_HELO_DATA
1110   helo_data=REMOTE_SMTP_HELO_DATA
1111 .endif
1112 .ifdef DKIM_DOMAIN
1113 dkim_domain = DKIM_DOMAIN
1114 .endif
1115 .ifdef DKIM_SELECTOR
1116 dkim_selector = DKIM_SELECTOR
1117 .endif
1118 .ifdef DKIM_PRIVATE_KEY
1119 dkim_private_key = DKIM_PRIVATE_KEY
1120 .endif
1121 .ifdef DKIM_CANON
1122 dkim_canon = DKIM_CANON
1123 .endif
1124 .ifdef DKIM_STRICT
1125 dkim_strict = DKIM_STRICT
1126 .endif
1127 .ifdef DKIM_SIGN_HEADERS
1128 dkim_sign_headers = DKIM_SIGN_HEADERS
1129 .endif
1130 .ifdef TLS_DH_MIN_BITS
1131 tls_dh_min_bits = TLS_DH_MIN_BITS
1132 .endif
1133 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1134 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1135 .endif
1136 .ifdef REMOTE_SMTP_PRIVATEKEY
1137 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1138 .endif
1139 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1140   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1141 .endif
1142 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1143   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1144 .endif
1145   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1146 EOF
1147
1148 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1149 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1150
1151 smarthost_dkim:
1152   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1153   driver = smtp
1154   multi_domain
1155 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1156   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1157 .endif
1158   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1159         {\
1160         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1161         }\
1162         {} \
1163       }
1164 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1165   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1166 .endif
1167 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1168   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1169 .endif
1170 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1171   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1172 .endif
1173 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1174   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1175 .endif
1176 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1177   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1178 .endif
1179 .ifdef REMOTE_SMTP_RETURN_PATH
1180   return_path = REMOTE_SMTP_RETURN_PATH
1181 .endif
1182 .ifdef REMOTE_SMTP_HELO_DATA
1183   helo_data=REMOTE_SMTP_HELO_DATA
1184 .endif
1185 .ifdef TLS_DH_MIN_BITS
1186 tls_dh_min_bits = TLS_DH_MIN_BITS
1187 .endif
1188 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1189 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1190 .endif
1191 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1192 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1193 .endif
1194 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1195   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1196 .endif
1197 .ifdef DKIM_DOMAIN
1198 dkim_domain = DKIM_DOMAIN
1199 .endif
1200 .ifdef DKIM_SELECTOR
1201 dkim_selector = DKIM_SELECTOR
1202 .endif
1203 .ifdef DKIM_PRIVATE_KEY
1204 dkim_private_key = DKIM_PRIVATE_KEY
1205 .endif
1206 .ifdef DKIM_CANON
1207 dkim_canon = DKIM_CANON
1208 .endif
1209 .ifdef DKIM_STRICT
1210 dkim_strict = DKIM_STRICT
1211 .endif
1212 .ifdef DKIM_SIGN_HEADERS
1213 dkim_sign_headers = DKIM_SIGN_HEADERS
1214 .endif
1215 EOF
1216
1217
1218 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1219 # default stuff, i havent checked if its needed
1220 dc_minimaldns='false'
1221 dc_relay_nets=''
1222 CFILEMODE='644'
1223 dc_use_split_config='true'
1224 dc_mailname_in_oh='true'
1225 EOF
1226
1227
1228 # * radicale
1229 if mailhost; then
1230   if ! mountpoint /o; then
1231     echo "error /o is not a mountpoint" >&2
1232     exit 1
1233   fi
1234
1235   # davx/davdroid setup instructions at the bottom
1236
1237   # main docs:
1238   # http://radicale.org/user_documentation/
1239   # https://davdroid.bitfire.at/configuration/
1240
1241   # note on debugging: if radicale can't bind to the address,
1242   # in the log it just says "Starting Radicale". If you run
1243   # it in the foreground, it will give more info. Background
1244   # plus debug does not help.
1245   # sudo -u radicale radicale -D -f
1246
1247   # created password file with:
1248   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1249   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1250   # # setup chgrp www-data in ./conflink
1251
1252   pi-nostart radicale
1253
1254   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1255 [Unit]
1256 # this unit is configured to start and stop whenever
1257 # $vpnser does
1258
1259 After=network.target network-online.target mailnn.service $vpnser
1260 BindsTo=$vpnser
1261
1262 Wants=network-online.target
1263 JoinsNamespaceOf=mailnn.service
1264 StartLimitIntervalSec=0
1265
1266 [Service]
1267 PrivateNetwork=true
1268 BindPaths=$bindpaths
1269 Restart=always
1270 # time to sleep before restarting a service
1271 RestartSec=1000
1272
1273 [Install]
1274 # for openvpn
1275 RequiredBy=$vpnser
1276 EOF
1277
1278
1279   # use persistent uid/gid
1280   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1281   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1282   if [[ $uid != 609 ]]; then
1283     m systemctl stop radicale ||:
1284     m usermod -u 609 radicale
1285     m groupmod -g 609 radicale
1286     m usermod -g 609 radicale
1287   fi
1288   m find /o/radicale  -xdev -exec chown -h 609 {} +
1289   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1290
1291
1292   # I moved /var/lib/radicale after it's initialization.
1293   # I did a sudo -u radicale git init in the collections subfolder
1294   # after it gets created, per the git docs.
1295   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1296
1297   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1298
1299   # more config is for li in distro-end
1300
1301   # coment in this file says this is needed for it to run on startup
1302   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1303
1304   # comments say default is 0.0.0.0:5232
1305   m setini hosts 10.8.0.4:5232 server
1306   # https://radicale.org/2.1.html
1307   m setini type http_x_remote_user auth
1308
1309
1310   # disable power management feature, set to 240 min sync interval,
1311   # so it shouldn't be bad.
1312
1313   # davdroid from f-druid.
1314   # login with url and user name
1315   # url https://cal.iankelling.org/ian
1316   # username ian
1317   # pass, see password manager for radicale
1318   #
1319   # add account dialog:
1320   #
1321   # set account name as ian@iankelling.org, per help text below the
1322   # field.
1323   #
1324   # switch to groups are per-contact categories,
1325   # per https://davdroid.bitfire.at/configuration/radicale/
1326   #
1327   #
1328   # After setting up account, I added one address book, named
1329   # ianaddr. calender was already created, named ian. checked boxes under
1330   # both. synced.
1331   #
1332   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1333   #
1334   # ignorable background info:
1335   #
1336   # opentasks uses the calendar file.
1337   #
1338   # The address book I created got a uuid as a name for the file. Note
1339   # the .props file says if it's a calendar or addressbook.
1340   #
1341   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1342   # both show the requests happening. Without creating the address book,
1343   # after creating a contact, a sync would delete it.
1344   #
1345   # Address books correspond to .props files in the radicale dir.
1346   #
1347   #  Some background is here,
1348   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1349   # which shows separate vcard option is from rfc 6350, the other is 2426,
1350   # radicale page says it implements the former not the latter,
1351   # which conflicts with the documentation of which to select, but whatever.
1352   # http://radicale.org/technical_choices/
1353   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1354   #
1355   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1356
1357   # Note, radicale had built-in git support to track changes, but they
1358   # removed it in 2.0.
1359
1360 fi
1361
1362 # * dovecot
1363
1364 # ** $MAIL_HOST|bk|je)
1365 case $HOSTNAME in
1366   $MAIL_HOST|bk|je)
1367     # based on a little google and package search, just the dovecot
1368     # packages we need instead of dovecot-common.
1369     #
1370     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1371     # directly.  The reason to do this is to use dovecot\'s sieve, which
1372     # can generally do more than exims filters (a few things less) and
1373     # sieve has the benefit of being supported in postfix and
1374     # proprietary/weird environments, so there is more examples on the
1375     # internet.
1376     pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1377
1378     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1379       if [[ -e $f ]]; then
1380         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1381         break
1382       fi
1383     done
1384     for f in /p/c/subdir_files/sieve/*sieve /a/c/subdir_files/sieve/*sieve; do
1385       m sudo -u $u /a/exe/lnf -T $f $uhome/sieve/${f##*/}
1386     done
1387
1388     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1389     i /etc/dovecot/dhparam <<'EOF'
1390 -----BEGIN DH PARAMETERS-----
1391 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1392 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1393 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1394 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1395 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1396 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1397 -----END DH PARAMETERS-----
1398 EOF
1399     {
1400       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1401         cat <<'EOF'
1402 ssl_cert = </etc/exim4/fullchain.pem
1403 ssl_key = </etc/exim4/privkey.pem
1404 EOF
1405       else
1406         cat <<'EOF'
1407 ssl_cert = </etc/exim4/exim.crt
1408 ssl_key = </etc/exim4/exim.key
1409 EOF
1410       fi
1411       cat <<EOF
1412 # https://ssl-config.mozilla.org
1413 ssl = required
1414 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1415 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
1416 ssl_protocols = TLSv1.2
1417 ssl_prefer_server_ciphers = no
1418 ssl_dh_parameters_length = 2048
1419
1420 protocol lmtp {
1421 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1422 # default is just \$mail_plugins
1423   mail_plugins = \$mail_plugins sieve
1424 }
1425 EOF
1426       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1427         cat <<EOF
1428 ssl_dh = </etc/dovecot/dhparam
1429 EOF
1430       fi
1431     } >/etc/dovecot/local.conf
1432
1433     ;;&
1434
1435   # **  $MAIL_HOST)
1436   $MAIL_HOST)
1437     # If we changed 90-sieve.conf and removed the active part of the
1438     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1439     # default config if not needed. This won\'t work as a symlink in /a/c
1440     # unfortunately.
1441     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1442
1443     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1444       m touch $uhome/sieve/personal{,end}{,test}.sieve
1445     fi
1446
1447     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1448     cat >>/etc/dovecot/local.conf <<EOF
1449 # simple password file based login
1450 !include conf.d/auth-passwdfile.conf.ext
1451
1452 # ian: %u is used for alerts user vs iank
1453 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1454 mail_uid = $u
1455 mail_gid = $u
1456
1457 protocol lmtp {
1458 # For a normal setup with exim, we need something like this, which
1459 # removes the domain part
1460 #  auth_username_format = %Ln
1461 #
1462 #  or else # Exim says something like
1463 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1464 # Dovecot verbose log says something like
1465 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1466 # reference: http://wiki.dovecot.org/LMTP/Exim
1467 #
1468 # However, I use this to direct all mail to the same inbox.
1469 # A normal way to do this, which I did at first is to have
1470 # a router in exim almost at the end, eg 950,
1471 #local_catchall:
1472 #  debug_print = "R: catchall for \$local_part@\$domain"
1473 #  driver = redirect
1474 #  domains = +local_domains
1475 #  data = $u
1476 # based on
1477 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1478 # with superflous options removed.
1479 # However, this causes the envelope to be rewritten,
1480 # which makes filtering into mailboxes a little less robust or more complicated,
1481 # so I've done it this way instead. it also requires
1482 # modifying the local router in exim.
1483   auth_username_format = $u
1484 }
1485 EOF
1486     ;;&
1487   # **  bk|je)
1488   bk|je)
1489     chown -R mail.mail /m/md
1490
1491     f=/etc/dovecot/conf.d/10-auth.conf
1492     if [[ -e $f ]]; then
1493       mv $f $f-iank-disabled
1494     fi
1495
1496     cat >>/etc/dovecot/local.conf <<EOF
1497 !include /etc/dovecot/local.conf.ext
1498
1499 # for debugging info, uncomment these.
1500 # logs go to syslog and to /var/log/mail.log
1501 #auth_verbose=yes
1502 #mail_debug=yes
1503
1504
1505 protocol lmtp {
1506 # This downcases the localpart. default is case sensitive.
1507 # case sensitive local part will miss out on valid email when some person or system
1508 # mistakenly capitalizes things.
1509   auth_username_format = %Lu
1510 }
1511
1512 # make 147 only listen on localhost, plan to use for nextcloud.
1513 # copied from mailinabox
1514 service imap-login {
1515   inet_listener imap {
1516     address = 127.0.0.1
1517   }
1518 }
1519 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1520 service auth {
1521   unix_listener auth-client {
1522     user = Debian-exim
1523     group = Debian-exim
1524   }
1525 }
1526
1527
1528 plugin {
1529   sieve_before = /etc/dovecot/sieve-spam.sieve
1530   # from mailinabox
1531   sieve = /m/sieve/%d/%n.sieve
1532   sieve_dir = /m/sieve/%d/%n
1533 }
1534
1535
1536 # all taken from mailinabox.
1537 mail_location = maildir:/m/md/%d/%n
1538 # meh, ok.
1539 mail_privileged_group = mail
1540 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1541 first_valid_uid = 1
1542
1543 # todo: test these changes in the universal config
1544 # mailboxes taken from mailinabox but removed
1545 # settings duplicate to defaults
1546 namespace inbox {
1547   mailbox INBOX {
1548     auto = subscribe
1549   }
1550   mailbox Spam {
1551     special_use = \Junk
1552     auto = subscribe
1553   }
1554   mailbox Drafts {
1555     auto = subscribe
1556   }
1557   mailbox Sent {
1558     auto = subscribe
1559   }
1560   mailbox Trash {
1561     auto = subscribe
1562   }
1563   mailbox Archive {
1564     special_use = \Archive
1565     auto = subscribe
1566   }
1567 }
1568 auth_mechanisms = plain login
1569 EOF
1570
1571     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1572 require ["regex", "fileinto", "imap4flags"];
1573
1574 if allof (header :regex "X-Spam-Status" "^Yes") {
1575   fileinto "Spam";
1576   stop;
1577 }
1578 EOF
1579
1580     i /etc/dovecot/local.conf.ext <<'EOF'
1581 passdb {
1582   driver = sql
1583   args = /etc/dovecot/dovecot-sql.conf.ext
1584 }
1585 userdb {
1586   driver = sql
1587   args = /etc/dovecot/dovecot-sql.conf.ext
1588 }
1589
1590 EOF
1591
1592     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1593 # from mailinabox
1594 driver = sqlite
1595 connect = /m/rc/users.sqlite
1596 default_pass_scheme = SHA512-CRYPT
1597 password_query = SELECT email as user, password FROM users WHERE email='%u';
1598 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1599 iterate_query = SELECT email AS user FROM users;
1600 EOF
1601     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1602
1603     # db needs to be in a www-data writable directory
1604     db=/m/rc/users.sqlite
1605     if [[ ! -s $db ]]; then
1606       m mkdir -p /m/rc
1607       m sqlite3 $db <<'EOF'
1608 CREATE TABLE users (
1609 id INTEGER PRIMARY KEY AUTOINCREMENT,
1610 email TEXT NOT NULL UNIQUE,
1611 password TEXT NOT NULL,
1612 extra,
1613 privileges TEXT NOT NULL DEFAULT '');
1614 EOF
1615     fi
1616     # example of adding a user:
1617     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1618     # sqlite3 /m/rc/users.sqlite <<'EOF'
1619     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1620     #EOF
1621     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1622
1623     # this should be at the end since it requires a valid dovecot config
1624     m sievec /etc/dovecot/sieve-spam.sieve
1625     ;;&
1626   # **  bk)
1627   bk)
1628     # roundcube uses this
1629     mkdir -p /m/sieve
1630     chown mail.mail /m/sieve
1631     m pi dovecot-managesieved
1632     ;;
1633 esac
1634
1635 # * thunderbird autoconfig setup
1636
1637 bkdomains=(expertpathologyreview.com amnimal.ninja)
1638 if [[ $HOSTNAME == bk ]]; then
1639   for domain in ${bkdomains[@]}; do
1640     m /a/exe/web-conf apache2 autoconfig.$domain
1641     dir=/var/www/autoconfig.$domain/html/mail
1642     m mkdir -p $dir
1643     # taken from mailinabox
1644     i $dir/config-v1.1.xml <<EOF
1645 <?xml version="1.0" encoding="UTF-8"?>
1646 <clientConfig version="1.1">
1647     <emailProvider id="$domain">
1648       <domain>$domain</domain>
1649
1650       <displayName>$domain Mail</displayName>
1651       <displayShortName>$domain</displayShortName>
1652
1653       <incomingServer type="imap">
1654          <hostname>mail2.iankelling.org</hostname>
1655          <port>993</port>
1656          <socketType>SSL</socketType>
1657          <username>%EMAILADDRESS%</username>
1658          <authentication>password-cleartext</authentication>
1659       </incomingServer>
1660
1661       <outgoingServer type="smtp">
1662          <hostname>mail2.iankelling.org</hostname>
1663          <port>587</port>
1664          <socketType>STARTTLS</socketType>
1665          <username>%EMAILADDRESS%</username>
1666          <authentication>password-cleartext</authentication>
1667          <addThisServer>true</addThisServer>
1668          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1669       </outgoingServer>
1670
1671       <documentation url="https://$domain/">
1672          <descr lang="en">$domain website.</descr>
1673       </documentation>
1674     </emailProvider>
1675
1676     <webMail>
1677       <loginPage url="https://$domain/roundcube" />
1678       <loginPageInfo url="https://$domain/roundcube" >
1679         <username>%EMAILADDRESS%</username>
1680         <usernameField id="rcmloginuser" name="_user" />
1681         <passwordField id="rcmloginpwd" name="_pass" />
1682         <loginButton id="rcmloginsubmit" />
1683       </loginPageInfo>
1684     </webMail>
1685     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1686 </clientConfig>
1687 EOF
1688   done
1689 fi
1690
1691 # * roundcube setup
1692
1693 if [[ $HOSTNAME == bk ]]; then
1694
1695   # zip according to /installer
1696   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1697   # $config['enable_installer'] = true;
1698   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1699
1700   ### begin composer install
1701   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1702   # cd $(mktemp -d)
1703   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1704   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1705   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1706   #   echo 'ERROR: Invalid composer installer checksum' >&2
1707   #   rm -fv composer-setup.php
1708   #   exit 1
1709   # fi
1710   # m php composer-setup.php --quiet
1711   # rm -fv composer-setup.php
1712   # m mv composer.phar /usr/local/bin
1713
1714   # the above method gets composer2, carddav plugin at least doesnt work with that
1715   # yet, it was just released 10-24-2020.
1716   m cd /usr/local/bin
1717   m wget -nv -N https://getcomposer.org/composer-1.phar
1718   chmod +x composer-1.phar
1719   ### end composer install
1720
1721   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1722   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1723   # point debian cronjob to our local install, preventing daily cron error
1724
1725   # debian's cronjob will fail, remove both paths it uses just to be sure
1726   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1727
1728   #### begin dl roundcube
1729   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1730   v=1.4.11; f=roundcubemail-$v-complete.tar.gz
1731   cd /a/opt
1732   if [[ -e $f ]]; then
1733     timestamp=$(stat -c %Y $f)
1734   else
1735     timestamp=0
1736   fi
1737   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1738   new_timestamp=$(stat -c %Y $f)
1739   for rcdir in ${rcdirs[@]}; do
1740     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1741       m tar -C /usr/local/lib --no-same-owner -zxf $f
1742       m rm -rf $rcdir
1743       m mv /usr/local/lib/roundcubemail-$v $rcdir
1744     fi
1745   done
1746   #### end dl roundcube
1747
1748   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1749     domain=${bkdomains[i]}
1750     rcdir=${rcdirs[i]}
1751     rcbase=${rcdir##*/}
1752     ncdir=${ncdirs[i]}
1753
1754     # copied from debians cronjob
1755     i /etc/cron.d/$rcbase <<EOF
1756 #  Roundcube database cleaning: finally removes all records that are
1757 #  marked as deleted.
1758 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1759 EOF
1760
1761     m /a/exe/web-conf - apache2 $domain <<EOF
1762 Alias /roundcube $rcdir
1763 ### begin roundcube settings
1764 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1765 <Directory $rcdir/>
1766   Options +FollowSymLinks
1767   # This is needed to parse $rcdir/.htaccess.
1768   AllowOverride All
1769   Require all granted
1770 </Directory>
1771 # Protecting basic directories:
1772 <Directory $rcdir/config>
1773   Options -FollowSymLinks
1774   AllowOverride None
1775 </Directory>
1776 ### end roundcube settings
1777
1778
1779 ### begin nextcloud settings
1780 Alias /nextcloud "$ncdir/"
1781 <Directory $ncdir/>
1782   Require all granted
1783   AllowOverride All
1784   Options FollowSymLinks MultiViews
1785
1786   <IfModule mod_dav.c>
1787     Dav off
1788   </IfModule>
1789
1790 </Directory>
1791
1792 # based on install checker, links to
1793 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1794 # their example was a bit wrong, I figured it out by adding
1795 # LogLevel warn rewrite:trace5
1796 # then watching the apache logs
1797
1798 RewriteEngine on
1799 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
1800 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
1801 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
1802 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
1803 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
1804 ### end nextcloud settings
1805 EOF
1806     if [[ ! -e $rcdir/config/secret ]]; then
1807       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
1808     fi
1809     secret=$(cat $rcdir/config/secret)
1810
1811     rclogdir=/var/log/$rcbase
1812     rctmpdir=/var/tmp/$rcbase
1813     rcdb=/m/rc/$rcbase.sqlite
1814     # config from mailinabox
1815     i $rcdir/config/config.inc.php <<EOF
1816 <?php
1817 \$config = array();
1818 # debian creates this for us
1819 \$config['log_dir'] = '$rclogdir/';
1820 # debian also creates a temp dir, but it is under its install dir,
1821 # seems better to have our own.
1822 \$config['temp_dir'] = '$rctmpdir/';
1823 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
1824 \$config['default_host'] = 'ssl://localhost';
1825 \$config['default_port'] = 993;
1826 \$config['imap_conn_options'] = array(
1827   'ssl'         => array(
1828      'verify_peer'  => false,
1829      'verify_peer_name'  => false,
1830    ),
1831  );
1832 \$config['imap_timeout'] = 15;
1833 \$config['smtp_server'] = 'tls://127.0.0.1';
1834 \$config['smtp_conn_options'] = array(
1835   'ssl'         => array(
1836      'verify_peer'  => false,
1837      'verify_peer_name'  => false,
1838    ),
1839  );
1840 \$config['product_name'] = 'webmail';
1841 \$config['des_key'] = '$secret';
1842 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
1843 \$config['skin'] = 'elastic';
1844 \$config['login_autocomplete'] = 2;
1845 \$config['password_charset'] = 'UTF-8';
1846 \$config['junk_mbox'] = 'Spam';
1847 # disable builtin addressbook
1848 \$config['address_book_type'] = '';
1849 ?>
1850 EOF
1851
1852     m mkdir -p $rclogdir
1853     m chmod 750 $rclogdir
1854     m chown www-data:adm $rclogdir
1855     # note: subscribed to updates:
1856     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
1857     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
1858     m mkdir -p $rctmpdir /m/rc
1859     m chown -R www-data.www-data $rctmpdir /m/rc
1860     m chmod 750 $rctmpdir
1861     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
1862     # todo: setup fail2ban
1863     # todo: check for other mailinabox things
1864     m sudo -u www-data touch $rclogdir/errors.log
1865
1866     #### begin carddav install
1867     # This is the official roundcube carddav repo.
1868     # Install doc suggests downloading with composer, but that
1869     # didnt work, it said some ldap package for roundcube was missing,
1870     # but I dont want to download some extra ldap thing.
1871     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
1872     verf=$rcdir/plugins/carddav/myversion
1873     upgrade=false
1874     install=false
1875     v=4.0.0
1876     if [[ -e $verf ]]; then
1877       if [[ $(cat $verf) != "$v" ]]; then
1878         install=true
1879         upgrade=true
1880       fi
1881     else
1882       install=true
1883     fi
1884     if $install; then
1885       m rm -rf $rcdir/plugins/carddav
1886       tmpd=$(mktemp -d)
1887       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
1888       cd $rcdir/plugins
1889       tar xzf $tmpd/t.tgz
1890       rm -rf $tmpd
1891       m chown -R www-data:www-data $rcdir/plugins/carddav
1892       m cd $rcdir/plugins/carddav
1893       if $upgrade; then
1894         m sudo -u www-data composer-1.phar update --no-dev
1895       else
1896         m sudo -u www-data composer-1.phar install --no-dev
1897       fi
1898       m chown -R root:root $rcdir/plugins/carddav
1899       echo $v >$verf
1900     fi
1901
1902     # So, strangely, this worked in initial testing, but then
1903     # on first run it wouldn't show the existing contacts until
1904     # I went into the carddav settings and did "force immediate sync",
1905     # which seemed to fix things. Note, some of these settings
1906     # get initalized per/addressbook in the db, then need changing
1907     # there or through the settings menu.
1908
1909     # About categories, see https://www.davx5.com/tested-with/nextcloud
1910     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
1911     i $rcdir/plugins/carddav/config.inc.php <<EOF;
1912 <?php
1913 \$prefs['_GLOBAL']['hide_preferences'] = false;
1914 \$prefs['davserver'] = array(
1915 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
1916   'name'         =>  'Main',
1917   'username'     =>  '%u', // login username
1918   'password'     =>  '%p', // login password
1919   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
1920   'active'       =>  true,
1921   'readonly'     =>  false,
1922   'refresh_time' => '00:10:00',
1923   'fixed'        =>  array('username','password'),
1924   'use_categories' => false,
1925   'hide'        =>  false,
1926 );
1927 ?>
1928 EOF
1929     #### end carddav install
1930
1931     cd $rcdir/plugins
1932     if [[ ! -d html5_notifier ]]; then
1933       m git clone https://github.com/stremlau/html5_notifier
1934     fi
1935     cd $rcdir/plugins/html5_notifier
1936     m git pull --rebase
1937
1938     # todo: try out roundcube plugins: thunderbird labels
1939
1940     # Password changing plugin settings
1941     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
1942 # following are from mailinabox
1943 $config['password_minimum_length'] = 8;
1944 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
1945 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
1946 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
1947 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
1948 $config['password_dovecotpw_with_method'] = true;
1949 EOF
1950     # so PHP can use doveadm, for the password changing plugin
1951     m usermod -a -G dovecot www-data
1952     m usermod -a -G mail $u
1953
1954     # so php can update passwords
1955     m chown www-data:dovecot /m/rc/users.sqlite
1956     m chmod 664 /m/rc/users.sqlite
1957
1958     # Run Roundcube database migration script (database is created if it does not exist)
1959     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
1960     m chown www-data:www-data $rcdb
1961     m chmod 664 $rcdb
1962   done # end loop over domains and rcdirs
1963
1964   ### begin php setup for rc ###
1965   # Enable PHP modules.
1966   m phpenmod -v php mcrypt imap
1967   # dpkg says this is required
1968   m a2enmod proxy_fcgi setenvif
1969   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.3-fpm
1970   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
1971   m a2enconf $fpm
1972   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
1973   # /etc/apache2/conf-enabled/php7.3-fpm.conf
1974   m a2dismod php$phpver
1975   # according to /install, we should set date.timezone,
1976   # but that is dumb, the system already has the right zone in
1977   # $rclogdir/errors.log
1978   # todo: consider other settings in
1979   # /a/opt/mailinabox/setup/nextcloud.sh
1980   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
1981 apc.enable_cli = 1
1982 EOF
1983
1984   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
1985 date.timezone = "America/New_York"
1986 # for nextcloud
1987 upload_max_filesize = 2000M
1988 post_max_size = 2000M
1989 # install checker, nextcloud/settings/admin/overview
1990 memory_limit = 512M
1991 EOF
1992   m systemctl restart $fpm
1993   # dunno if reload/restart is needed
1994   m systemctl reload apache2
1995   # note bk backups are defined in crontab outside this file
1996   ### end php setup for rc ###
1997
1998 fi # end roundcube setup
1999
2000 # * nextcloud setup
2001
2002 if [[ $HOSTNAME == bk ]]; then
2003   # from install checker, nextcloud/settings/admin/overview and
2004   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2005   # curl from the web installer requirement, but i switched to cli
2006   # it recommends php-file info, but that is part of php7.3-common, already got installed
2007   # with roundcube.
2008   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2009
2010   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2011   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2012 [www]
2013 clear_env = no
2014 EOF
2015
2016   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2017     domain=${bkdomains[i]}
2018     ncdir=${ncdirs[i]}
2019     ncbase=${ncdir##*/}
2020     m cd /var/www
2021     if [[ ! -e $ncdir/index.php ]]; then
2022       # if we wanted to only install a specific version, use something like
2023       # file=latest-22.zip
2024       file=latest.zip
2025       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2026       m rm -rf nextcloud
2027       m unzip -q $file
2028       m rm -f $file
2029       m chown -R www-data.www-data nextcloud
2030       m mv nextcloud $ncdir
2031       m cd $ncdir
2032       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2033     fi
2034     # note, strange this happend where updater did not increment the version var,
2035     # mine was stuck on 20. I manually updated it.
2036     m cd $ncdir/config
2037     if [[ ! -e config.php-orig ]]; then
2038       m cp -a config.php config.php-orig
2039     fi
2040     cat config.php-orig - >tmp.php <<EOF
2041 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2042 \$CONFIG["mail_smtpmode"] = "sendmail";
2043 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2044 \$CONFIG["mail_smtpport"] = 25;
2045 \$CONFIG["mail_smtptimeout"] = 10;
2046 \$CONFIG["mail_smtpsecure"] = "";
2047 \$CONFIG["mail_smtpauth"] = false;
2048 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2049 \$CONFIG["mail_smtpname"] = "";
2050 \$CONFIG["mail_smtppassword"] = "";
2051 \$CONFIG["mail_domain"] = "$domain";
2052
2053 # https://github.com/nextcloud/user_external#readme
2054 # plus mailinabox example
2055 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2056
2057
2058 # based on installer check
2059 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2060 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2061
2062 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2063 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2064 \$CONFIG['trusted_domains'] = array (
2065         0 => '$domain',
2066     );
2067 #\$CONFIG[''] = '';
2068 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2069 var_export(\$CONFIG);
2070 fwrite(STDOUT, ";\n");
2071 EOF
2072     m php tmp.php >config.php
2073     m rm tmp.php
2074     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2075     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2076     # user_external not compaible with nc 23
2077     for app in contacts calendar; do
2078       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2079         m sudo -u www-data php $ncdir/occ app:install $app
2080       fi
2081     done
2082     i /etc/systemd/system/$ncbase.service <<EOF
2083 [Unit]
2084 Description=ncup $ncbase
2085 After=multi-user.target
2086
2087 [Service]
2088 Type=oneshot
2089 ExecStart=/usr/local/bin/ncup $ncbase
2090 User=www-data
2091 IOSchedulingClass=idle
2092 CPUSchedulingPolicy=idle
2093 EOF
2094     i /etc/systemd/system/$ncbase.timer <<EOF
2095 [Unit]
2096 Description=ncup $ncbase timer
2097
2098 [Timer]
2099 OnCalendar=Daily
2100
2101 [Install]
2102 WantedBy=timers.target
2103 EOF
2104     systemctl enable --now $ncbase.timer
2105     i /usr/local/bin/ncup <<'EOFOUTER'
2106 #!/bin/bash
2107 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2108 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2109 set -eE -o pipefail
2110 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2111
2112 ncbase=$1
2113 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2114   echo failed nextcloud update for $ncbase >&2
2115   /sbin/exim -t <<EOF
2116 To: alerts@iankelling.org
2117 From: root@$(hostname -f)
2118 Subject: failed nextcloud update for $ncbase
2119
2120 For logs, run: jr -u $ncbase
2121 EOF
2122 fi
2123 EOFOUTER
2124
2125     mkdir -p /var/www/cron-errors
2126     chown www-data.www-data /var/www/cron-errors
2127     i /etc/cron.d/$ncbase <<EOF
2128 PATH=/sbin:/usr/sbin:/usr/bin:/bin:/usr/local/bin
2129 SHELL=/bin/bash
2130 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2131 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2132 EOF
2133
2134   done
2135 fi
2136
2137
2138 # * exim host conditional config
2139
2140 # ** exim certs
2141
2142 all_dirs=(/p/c/filesystem)
2143 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2144   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2145 done
2146 files=()
2147 for d in ${all_dirs[@]}; do
2148   f=$d/etc/exim4/passwd
2149   if [[ -e $f  ]]; then
2150     files+=($f)
2151   fi
2152   tmp=($d/etc/exim4/*.pem)
2153   if (( ${#tmp[@]} )); then
2154     files+=(${tmp[@]})
2155   fi
2156 done
2157
2158 if (( ${#files[@]} )); then
2159   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2160 fi
2161
2162
2163 # ** auth
2164
2165 case $HOSTNAME in
2166   bk|je)
2167     # avoid accepting mail for invalid users
2168     # https://wiki.dovecot.org/LMTP/Exim
2169     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2170 deny
2171   message = invalid recipient
2172   domains = +local_domains
2173   !verify = recipient/callout=no_cache
2174 EOF
2175     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2176 dovecot_plain:
2177   driver = dovecot
2178   public_name = PLAIN
2179   server_socket = /var/run/dovecot/auth-client
2180   server_set_id = $auth1
2181 EOF
2182     ;;
2183 esac
2184 if $bhost_t; then
2185   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2186 # from 30_exim4-config_examples
2187 plain_server:
2188 driver = plaintext
2189 public_name = PLAIN
2190 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2191 server_set_id = $auth2
2192 server_prompts = :
2193 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2194 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2195 .endif
2196 EOF
2197 fi
2198
2199 # ** main daemon use non-default config file
2200 case $HOSTNAME in
2201   bk|$MAIL_HOST)
2202     # to see the default comments in /etc/default/exim4:
2203     # s update-exim4defaults --force --init
2204     # which will overwrite any existing file
2205     i /etc/default/exim4 <<'EOF'
2206 QUEUERUNNER='combined'
2207 QUEUEINTERVAL='30m'
2208 COMMONOPTIONS='-C /etc/exim4/my.conf'
2209 UPEX4OPTS='-o /etc/exim4/my.conf'
2210 #E4BCD_PANICLOG_NOISE='malware acl condition: clamd /var/run/clamav/clamd\.ctl : unable to connect to UNIX socket'
2211 EOF
2212     i /etc/exim4/trusted_configs <<'EOF'
2213 /etc/exim4/my.conf
2214 EOF
2215     ;;
2216   *)
2217     # default file
2218     i /etc/default/exim4 <<'EOF'
2219 QUEUERUNNER='combined'
2220 QUEUEINTERVAL='30m'
2221 EOF
2222     ;;
2223 esac
2224
2225 case $HOSTNAME in
2226   # ** $MAIL_HOST|bk|je)
2227   $MAIL_HOST|bk|je)
2228
2229     echo|i /etc/exim4/conf.d/router/870_backup_local
2230
2231     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2232 # note: some things we don't set that are here by default because they are unused.
2233 dc_local_interfaces=''
2234 dc_eximconfig_configtype='internet'
2235 dc_localdelivery='dovecot_lmtp'
2236 EOF
2237     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2238 # recommended if dns is expected to work
2239 CHECK_RCPT_VERIFY_SENDER = true
2240 # default config comment says: If you enable this, you might reject legitimate mail,
2241 # but eggs has had this a long time, so that seems unlikely.
2242 CHECK_DATA_VERIFY_HEADER_SYNTAX = true
2243 CHECK_RCPT_SPF = true
2244 CHECK_RCPT_REVERSE_DNS = true
2245 CHECK_MAIL_HELO_ISSUED = true
2246
2247 # enable 587 in addition to the default 25, so that
2248 # i can send mail where port 25 is firewalled by isp
2249 daemon_smtp_ports = 25 : 587
2250 # default of 25, can get stuck when catching up on mail
2251 smtp_accept_max = 400
2252 smtp_accept_reserve = 100
2253 smtp_reserve_hosts = +iank_trusted
2254
2255 # options exim has to avoid having to alter the default config files
2256 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2257 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2258 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2259 # testing dmarc
2260 #dmarc_tld_file = /etc/public_suffix_list.dat
2261 EOF
2262     ;;&
2263
2264   # ** $MAIL_HOST|bk)
2265   $MAIL_HOST|bk)
2266
2267     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2268 # je.b8.nz will run out of memory with freshclam
2269 av_scanner = clamd:/var/run/clamav/clamd.ctl
2270 EOF
2271
2272     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2273 deny
2274   malware = */defer_ok
2275   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2276   message = This message was detected as possible malware ($malware_name).
2277 EOF
2278
2279     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2280 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2281 # smarthost config type, not sure.
2282 # failing message on mail-tester.com:
2283 # We check if there is a server (A Record) behind your hostname kd.
2284 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2285 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2286 # and this one seemed appropriate from grepping config.
2287 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2288 # mail to kd, so this should basically be a name that no host has as their
2289 # canonical hostname since the actual host sits behind a nat and changes.
2290 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2291 # I used this to avoid sender verification, didnt work but it still
2292 # makes sense based on the spec.
2293 hosts_treat_as_local = defaultnn.b8.nz
2294
2295 # Outside nn, we get the default cert location from a debian macro,
2296 # and the cert file is put in place by a certbot hook.
2297 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2298 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2299 EOF
2300
2301     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2302 gnusmarthost:
2303   debug_print = "R: smarthost for $local_part@$domain"
2304   driver = manualroute
2305   domains = ! +local_domains
2306 # send most mail through eggs, helps fsfs sender reputation.
2307 # uncomment and optionally move to 188 file to send through my own servers again
2308   senders = *@gnu.org
2309   transport = smarthost_dkim
2310   route_list = * fencepost.gnu.org::587 byname
2311   host_find_failed = ignore
2312   same_domain_copy_routing = yes
2313   no_more
2314 EOF
2315
2316     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2317 10.173.8.1 defaultnn.b8.nz
2318 EOF
2319     ;;&
2320   # ** $MAIL_HOST)
2321   $MAIL_HOST)
2322
2323     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2324 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2325 # use vpn transport. lower priority so it overrides the default route.
2326 # Use this in case our vpn fails, we dont send anything without it.
2327 .ifdef DCconfig_internet
2328 dnslookup_vpn:
2329   debug_print = "R: dnslookup for $local_part@$domain"
2330   driver = dnslookup
2331   domains = ! +local_domains
2332   transport = remote_smtp_vpn
2333   same_domain_copy_routing = yes
2334   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
2335   no_more
2336 .endif
2337 EOF
2338
2339
2340     # note on backups: I used to do an automatic sshfs and restricted
2341     # permissions to a specific directory on the remote server, /bu/mnt,
2342     # which required using a dedicated user, but realized smtp will be
2343     # more reliable and less fuss. If I ever need that again, see the
2344     # history of this file, and bum in brc2.
2345
2346     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2347 ### router/900_exim4-config_local_user
2348 #################################
2349
2350 # todo, it would be nice to save sent email too,
2351 # but its not so important, they still exist in my head
2352
2353 backup_redir:
2354 driver = redirect
2355 domains = +local_domains
2356 # b is just an arbirary short string
2357 data = b@eximbackup.b8.nz
2358 # note, to test this, i could temporarily allow testignore.
2359 # alerts avoids potential mail loop. root is already
2360 # redirected earlier, so that is just being overly cautious.
2361 local_parts = ! root : ! testignore : ! alerts
2362 unseen = true
2363
2364 backup_copy:
2365 driver = manualroute
2366 domains = eximbackup.b8.nz
2367 transport = backup_remote
2368 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2369 # note changes here also require change in passwd.client
2370 route_list = * eximbackup.b8.nz
2371 same_domain_copy_routing = yes
2372 no_more
2373 EOF
2374
2375
2376     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2377 backup_remote:
2378   driver = smtp
2379   multi_domain
2380 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2381   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2382 .endif
2383   hosts_require_auth = *
2384   hosts_try_auth = *
2385   return_path = alerts@iankelling.org
2386   envelope_to_add
2387   # manual return path because we dont want it to be the envelope sender
2388   # we got not the one we are using in this smtp transport
2389   headers_add = "Return-path: $sender_address"
2390 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2391   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2392 .endif
2393 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2394   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2395 .endif
2396 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2397   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2398 .endif
2399 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2400   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2401 .endif
2402 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2403   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2404 .endif
2405 .ifdef REMOTE_SMTP_HELO_DATA
2406   helo_data=REMOTE_SMTP_HELO_DATA
2407 .endif
2408 .ifdef TLS_DH_MIN_BITS
2409 tls_dh_min_bits = TLS_DH_MIN_BITS
2410 .endif
2411 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2412 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2413 .endif
2414 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2415 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2416 .endif
2417 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2418   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2419 .endif
2420 EOF
2421
2422
2423     # this avoids some error. i cant remember what. todo:
2424     # test it out and document why/if its needed.
2425     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2426 mail.fsf.org
2427 *.posteo.de
2428 EOF
2429
2430     # cron email from smarthost hosts will automatically be to
2431     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2432     # case that doesn't work, we still want to accept that mail, but not
2433     # from any host except the smarthosts. local_hostnames and this rule
2434     # is for that purpose.
2435     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2436 deny
2437   !authenticated = *
2438   domains = +local_hostnames
2439   message = no relay
2440 EOF
2441     echo|i /etc/exim4/conf.d/router/880_universal_forward
2442
2443     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2444     # and also have mail.iankelling.org whitelisted as a relay domain.
2445     # I could avoid that if I changed this to submit to 587 with a
2446     # password like a standard mua.
2447     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2448 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2449 # replaced DCsmarthost with hostname
2450 fsfsmarthost:
2451   debug_print = "R: smarthost for $local_part@$domain"
2452   driver = manualroute
2453   domains = ! +local_domains
2454   senders = *@fsf.org
2455   transport = remote_smtp_smarthost
2456   route_list = * mail.fsf.org::587 byname
2457   host_find_failed = ignore
2458   same_domain_copy_routing = yes
2459   no_more
2460
2461 posteosmarthost:
2462   debug_print = "R: smarthost for $local_part@$domain"
2463   driver = manualroute
2464   domains = ! +local_domains
2465   senders = *@posteo.net
2466   transport = remote_smtp_smarthost
2467   route_list = * posteo.de::587 byname
2468   host_find_failed = ignore
2469   same_domain_copy_routing = yes
2470   no_more
2471
2472 EOF
2473
2474     # Greping /etc/exim4, unqualified mails this would end up as
2475     # a return path, so it should go somewhere we will see.
2476     # The debconf output about mailname is as follows:
2477     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2478     # name.
2479     # This name will also be used by other programs. It should be the single, fully
2480     # qualified domain name (FQDN).
2481     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2482     # this option would be example.org.
2483     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2484     echo iankelling.org > /etc/mailname
2485
2486
2487     # mail.iankelling.org so local imap clients can connect with tls and
2488     # when they happen to not be local.
2489     # todo: this should be 10.8.0.4
2490
2491     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2492 # note: i put nn.b8.nz into bind for good measure
2493 10.173.8.2 nn.b8.nz mx.iankelling.org
2494 EOF
2495
2496     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2497     # weve configured this file in dnsmasq if we are using it.
2498     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2499 server=/mx.iankelling.org/127.0.1.1
2500 EOF
2501     # I used to use debconf-set-selections + dpkg-reconfigure,
2502     # which then updates this file
2503     # but the process is slower than updating it directly and then I want to set other things in
2504     # update-exim4.conf.conf, so there's no point.
2505     # The file is documented in man update-exim4.conf,
2506     # except the man page is not perfect, read the bash script to be sure about things.
2507
2508     # The debconf questions output is additional documentation that is not
2509     # easily accessible, but super long, along with the initial default comment in this
2510     # file, so I've saved that into ./mail-notes.conf.
2511     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2512 # man page: is used to build the local_domains list, together with "localhost"
2513 # this is duplicated in a later router.
2514 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2515 EOF
2516
2517
2518     # dmarc. not used currently
2519     f=/etc/cron.daily/refresh-dmarc-tld-file
2520     cat >$f <<'EOF'
2521 #!/bin/bash
2522 cd /etc
2523 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2524 EOF
2525     m chmod 755 $f
2526
2527     ;;
2528   # ** bk
2529   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2530   bk)
2531
2532     echo|i /etc/exim4/conf.d/rcpt_local_acl
2533     echo|i /etc/exim4/conf.d/router/880_universal_forward
2534
2535     echo amnimal.ninja > /etc/mailname
2536
2537     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2538 10.173.8.2 nn.b8.nz
2539 EOF
2540
2541     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2542 s,/etc/default/exim4,/etc/default/exim4in,g
2543 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2544 s,(^[ #]*Provides:).*,\1 exim4in,
2545 s,(^[ #]*NAME=).*,\1"exim4in",
2546 EOF
2547     chmod +x /etc/init.d/exim4in
2548     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2549 [Unit]
2550 # needed to continually restart
2551 StartLimitIntervalSec=0
2552
2553 [Service]
2554 Restart=always
2555 # time to sleep before restarting a service
2556 RestartSec=1
2557 EOF
2558
2559     i /etc/default/exim4in <<'EOF'
2560 # defaults but no queue runner and alternate config dir
2561 QUEUERUNNER='no'
2562 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2563 UPEX4OPTS='-d /etc/myexim4'
2564 EOF
2565
2566     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2567 # man page: is used to build the local_domains list, together with "localhost"
2568 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com'
2569 EOF
2570
2571     ;;
2572   # ** je
2573   je)
2574     echo je.b8.nz > /etc/mailname
2575     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2576 dc_other_hostnames='je.b8.nz'
2577 EOF
2578     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2579     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2580     echo|i /etc/exim4/conf.d/rcpt_local_acl
2581     echo|i /etc/exim4/conf.d/router/880_universal_forward
2582     ;;
2583   # ** not MAIL_HOST|bk|je
2584   *)
2585     # this one should be removed for all non mail hosts, but
2586     # bk and je never become mail_host
2587     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2588
2589     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2590     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2591     echo|i /etc/exim4/conf.d/rcpt_local_acl
2592     echo|i /etc/exim4/conf.d/router/890_backup_copy
2593     echo|i /etc/exim4/conf.d/main/000_local-nn
2594
2595
2596     if $bhost_t; then
2597       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2598 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2599 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2600 # so we can maintiain the originals of the backups.
2601 # we wouldnt want this if we were dealing with any other
2602 # local deliveries, but we sent all others to the smarthost
2603 # which then strips the headers.
2604 envelope_to_remove = false
2605 return_path_remove = false
2606 EOF
2607     fi
2608
2609     # catches things like cronjob email
2610     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2611 universal_forward:
2612   driver = redirect
2613   domains = +local_domains
2614   data = alerts@iankelling.org
2615 EOF
2616
2617
2618     for unit in ${nn_progs[@]}; do
2619       f=/etc/systemd/system/$unit.service.d/nn.conf
2620       rm -fv $f
2621     done
2622
2623     # dont i dont care if defaultnn section gets left, it wont
2624     # get used.
2625     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2626     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2627
2628     if $bhost_t; then
2629       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2630 # modified debian maildir transport
2631 backup_maildir:
2632   driver = appendfile
2633   directory = /bu/md
2634   delivery_date_add
2635   # note, no return path or envelope added
2636   maildir_format
2637   directory_mode = 0700
2638   mode = 0644
2639   mode_fail_narrower = false
2640   user = $u
2641 EOF
2642
2643       i /etc/exim4/conf.d/router/870_backup_local <<EOF
2644 ### router/900_exim4-config_local_user
2645 #################################
2646
2647 backup_local:
2648   debug_print = "R: local_user for \$local_part@\$domain"
2649   driver = accept
2650   domains = eximbackup.b8.nz
2651   transport = backup_maildir
2652 EOF
2653
2654       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2655       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2656 dc_other_hostnames='eximbackup.b8.nz'
2657 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2658
2659 EOF
2660     else
2661       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2662 # Note: If theres like a temporary problem where mail gets sent to
2663 # one of these hosts, if exim isnt listening, it will be a temporary error
2664 # instead of a permanent 5xx.
2665 dc_local_interfaces='127.0.0.1;::1'
2666 EOF
2667     fi
2668     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2669 dc_eximconfig_configtype='smarthost'
2670 dc_smarthost='$smarthost'
2671 EOF
2672
2673     hostname -f |i /etc/mailname
2674     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2675 # The manpage incorrectly states this will do header rewriting, but
2676 # that only happens if we have dc_hide_mailname is set.
2677 dc_readhost='iankelling.org'
2678 # Only used in case of bounces.
2679 dc_localdelivery='maildir_home'
2680 EOF
2681     ;;
2682 esac
2683
2684
2685
2686
2687 # ** $MAILHOST|bk, things that belong at the end
2688 case $HOSTNAME in
2689   $MAIL_HOST|bk)
2690     # config for the non-nn exim
2691     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2692     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
2693 dc_eximconfig_configtype='smarthost'
2694 dc_smarthost='nn.b8.nz'
2695 EOF
2696     ;;&
2697   bk)
2698
2699     # config for the non-nn exim
2700     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2701 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
2702 EOF
2703     ;;
2704   $MAIL_HOST)
2705     # for bk, we have a exim4in.service that will do this for us.
2706     m update-exim4.conf -d /etc/myexim4
2707     ;;
2708 esac
2709
2710 # * spool dir setup
2711
2712 # ** bind mount setup
2713 # put spool dir in directory that spans multiple distros.
2714 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
2715 #
2716 dir=/nocow/exim4
2717 sdir=/var/spool/exim4
2718 # we only do this if our system has $dir
2719
2720 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
2721 # about 2 seconds later, exim starts, and immediately puts into paniclog:
2722 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
2723 # so, im trying a bind mount to get rid of that.
2724 if [[ -e /nocow ]]; then
2725   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
2726     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
2727   fi
2728   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
2729 [Unit]
2730 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
2731 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
2732 After=local-fs.target
2733 EOF
2734   if ! mountpoint -q $sdir; then
2735     stopifactive exim4 exim4in
2736     if [[ -L $sdir ]]; then
2737       m rm $sdir
2738     fi
2739     if [[ ! -e $dir && -d $sdir ]]; then
2740       m mv $sdir $dir
2741     fi
2742     if [[ ! -d $sdir ]]; then
2743       m mkdir $sdir
2744       m chmod 000 $sdir # only want it to be used when its mounted
2745     fi
2746     m mount $sdir
2747   fi
2748 fi
2749
2750
2751
2752 # ** exim/spool uid setup
2753 # i have the spool directory be common to distro multi-boot, so
2754 # we need the uid to be the same. 608 cuz it's kind of in the middle
2755 # of the free system uids.
2756 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
2757 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
2758 if [[ ! $uid ]]; then
2759   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
2760   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
2761     --no-create-home --disabled-login --force-badname Debian-exim
2762 elif [[ $uid != 608 ]]; then
2763   stopifactive exim4 exim4in
2764   m usermod -u 608 Debian-exim
2765   m groupmod -g 608 Debian-exim
2766   m usermod -g 608 Debian-exim
2767   m find / /nocow -path ./var/tmp -prune -o -xdev -uid $uid -execdir chown -h 608 {} +
2768   m find / /nocow -path ./var/tmp -prune -o -xdev -gid $gid -execdir chgrp -h 608 {} +
2769 fi
2770
2771 # * start / stop services
2772
2773 reifactive dnsmasq nscd
2774
2775 if $reload; then
2776   m systemctl daemon-reload
2777 fi
2778
2779 m systemctl --now enable epanicclean.timer
2780
2781 case $HOSTNAME in
2782   je)
2783     /a/exe/web-conf apache2 je.b8.nz
2784     ;;
2785   bk)
2786     /a/exe/web-conf apache2 mail2.iankelling.org
2787     ;;
2788 esac
2789
2790 m /a/bin/ds/mail-cert-cron -1
2791 sre mailcert.timer
2792
2793 case $HOSTNAME in
2794   bk)
2795     # todo, this should be done in distro-begin
2796     soff systemd-resolved
2797     ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf
2798     ;;&
2799   $MAIL_HOST|bk)
2800     m systemctl --now enable mailnn mailnnroute
2801     ;;&
2802   $MAIL_HOST)
2803     # we use dns to start wg
2804     if $reload; then
2805       sre unbound
2806     else
2807       m systemctl --now enable unbound
2808     fi
2809     ;;&
2810   $MAIL_HOST|bk)
2811     # If these have changes, id rather manually restart it, id rather
2812     # not restart and cause temporary errors
2813     if $reload; then
2814       sre $vpnser
2815     else
2816       m systemctl --now enable $vpnser
2817     fi
2818     if ! systemctl is-active clamav-daemon >/dev/null; then
2819       m systemctl --now enable clamav-daemon
2820       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.{timer,service} /etc/systemd/system)
2821       if [[ $out ]]; then
2822         reload=true
2823       fi
2824
2825       # note, this will cause paniclog entries because it takes like 45
2826       # seconds for clamav to start, i use ./epanic-clean to remove
2827       # them.
2828     fi
2829     ;;&
2830   $MAIL_HOST|bk|je)
2831     # start spamassassin/dovecot before exim.
2832     sre dovecot spamassassin
2833     # need to wait a bit before restarting exim, else I
2834     # get a paniclog entry like: spam acl condition: all spamd servers failed
2835     sleep 3
2836     m systemctl --now enable mailclean.timer
2837     ;;&
2838   $MAIL_HOST)
2839     # < 2.1 (eg: in t9), uses a different data format which required manual
2840     # migration. dont start if we are running an old version.
2841     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
2842       m systemctl --now enable radicale
2843     fi
2844     ;;&
2845 esac
2846
2847 # last use of $reload happens in previous block
2848 rm -f /var/local/mail-setup-reload
2849
2850
2851 case $HOSTNAME in
2852   $MAIL_HOST|bk|je) : ;;
2853   *)
2854     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
2855     ;;
2856 esac
2857
2858 sre exim4
2859
2860 case $HOSTNAME in
2861   $MAIL_HOST)
2862     m systemctl --now enable mailbindwatchdog
2863   ;;
2864   *)
2865     soff mailbindwatchdog
2866     ;;
2867 esac
2868
2869
2870 case $HOSTNAME in
2871   bk) sre exim4in ;;
2872 esac
2873
2874 # * mail monitoring / testing
2875
2876 # note, to test clamav, send an email with body that only contains
2877 # https://en.wikipedia.org/wiki/EICAR_test_file
2878 # which set malware_name to Eicar-Signature
2879 case $HOSTNAME in
2880   $MAIL_HOST|bk|je)
2881     # note: cronjob "ian" also does some important monitoring
2882     # todo: this will sometimes cause an alert because mailtest-check will run
2883     # before we have setup network namespace and spamassassin
2884     cat >/etc/cron.d/mailtest <<EOF
2885 SHELL=/bin/bash
2886 PATH=/usr/bin:/bin:/usr/local/bin
2887 MAILTO=alerts@iankelling.org
2888 */5 * * * *   $u send-test-forward |& log-once send-test-forward
2889 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
2890 # im seeing some intermittent failures on the slow check, do it all the time
2891 # for now. It looks like a dns failure.
2892 #5-59/5 * * * *   root mailtest-check |& log-once -1 mailtest-check
2893 #0 * * * *   root mailtest-check slow |& log-once -1 mailtest-slow
2894 */5 * * * *   root timeout 290 mailtest-check slow |& log-once -12 mailtest-check
2895 EOF
2896     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
2897       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
2898     ;;&
2899   $MAIL_HOST)
2900     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
2901     test_to="testignore@expertpathologyreview.com, testignore@je.b8.nz, testignore@amnimal.ninja, jtuttle@gnu.org"
2902
2903     cat >>/etc/cron.d/mailtest <<EOF
2904 2   * * * *   $u check-remote-mailqs |& log-once check-remote-mailqs
2905 EOF
2906     ;;&
2907   bk)
2908     test_froms=(testignore@expertpathologyreview.com testignore@amnimal.ninja)
2909     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@je.b8.nz"
2910     ;;&
2911   je)
2912     test_froms=(testignore@je.b8.nz)
2913     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@expertpathologyreview.com, testignore@amnimal.ninja"
2914     ;;&
2915   $MAIL_HOST|bk|je)
2916     cat >/usr/local/bin/send-test-forward <<'EOF'
2917 #!/bin/bash
2918 olds=(
2919 $(/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
2920 )
2921 if (( ${#olds[@]} )); then
2922   /sbin/exim -Mrm "${olds[@]}" >/dev/null
2923 fi
2924 EOF
2925     for test_from in ${test_froms[@]}; do
2926       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
2927 /usr/sbin/exim -f $test_from -t <<EOF
2928 From: $test_from
2929 To: $test_to
2930 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$(date +%s)
2931
2932 /usr/local/bin/send-test-forward
2933 EOF
2934 EOFOUTER
2935     done
2936     m chmod +x /usr/local/bin/send-test-forward
2937     ;;
2938   *)
2939     rm -fv /etc/cron.d/mailtest
2940     ;;
2941 esac
2942
2943
2944
2945 # * misc
2946 m sudo -u $u mkdir -p /home/$u/.cache
2947 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
2948 while (($#)); do
2949   target=$1
2950   f=$2
2951   shift 2
2952   if [[ ! -L $f ]]; then
2953     if [[ -e $f ]]; then
2954       rm -rf $f
2955     fi
2956     m sudo -u $u ln -sf -T $target $f
2957   fi
2958 done
2959
2960
2961 # /etc/alias setup is debian specific, and exim postinst script sets up
2962 # an /etc/alias from root to the postmaster, based on the question
2963 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
2964 # root, or there was no preexisting aliases file. postfix won\'t set up
2965 # a root to $postmaster alias if it\'s already installed. Easiest to
2966 # just set it ourselves.
2967
2968 # debconf question for postmaster:
2969 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
2970 # to the user account of the actual system administrator.
2971 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
2972 # recommended.
2973 # Note that postmaster\'s mail should be read on the system to which it is directed,
2974 # rather than being forwarded elsewhere, so (at least one of) the users listed here
2975 # should not redirect their mail off this machine. A 'real-' prefix can be used to
2976 # force local delivery.
2977 # Multiple user names need to be separated by spaces.
2978 # Root and postmaster mail recipient:
2979
2980 m exit 0
2981 :
2982
2983 # Local Variables:
2984 # eval: (outline-minor-mode)
2985 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
2986 # End:
2987 # this is combined with defining outline-level in init.el