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|bo)
 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 [[ $(debian-codename) == etiona ]]; then
 405   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 406   # so running iptables as part of openvpn startup wont work. This should do it.
 407   pi iptables-persistent
 408   cat >/etc/iptables/rules.v6 <<'EOF'
 409 *mangle
 410 COMMIT
 411 *nat
 412 COMMIT
 413 EOF
 414   # load it now.
 415   m ip6tables -S >/dev/null
 416 fi
 417
 418 # our nostart pi fails to avoid enabling
 419
 420
 421 # * Mail clean cronjob
 422
 423 i /etc/systemd/system/mailclean.timer <<'EOF'
 424 [Unit]
 425 Description=Run mailclean daily
 426
 427 [Timer]
 428 OnCalendar=monthly
 429
 430 [Install]
 431 WantedBy=timers.target
 432 EOF
 433
 434 i /etc/systemd/system/mailclean.service <<EOF
 435 [Unit]
 436 Description=Delete and archive old mail files
 437 After=multi-user.target
 438
 439 [Service]
 440 User=$u
 441 Type=oneshot
 442 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 443 EOF
 444
 445 # * postgrey
 446
 447
 448 i /etc/default/postgrey <<'EOF'
 449 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 450 EOF
 451
 452 # * clamav
 453
 454 m usermod -a -G Debian-exim clamav
 455
 456 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 457 [Service]
 458 ExecStartPre=-/bin/mkdir /var/run/clamav
 459 ExecStartPre=/bin/chown clamav /var/run/clamav
 460 EOF
 461
 462 # * mail vpn config
 463
 464 # old.
 465 #vpnser=mailvpn.service
 466 # todo: this hangs if it cant resolv the endpoint. we
 467 # want it to just retry in the background.
 468 vpnser=wg-quick@wgmail.service
 469
 470 case $HOSTNAME in
 471   $MAIL_HOST)
 472     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 473     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 474     ;;&
 475   bk)
 476     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 477     ;;&
 478   *)
 479     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 480     if [[ -d $d ]]; then
 481       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 482     fi
 483     ;;
 484 esac
 485
 486 case $HOSTNAME in
 487   li) : ;;
 488   *)
 489     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 490 [Unit]
 491 Requires=mailnn.service
 492 After=network.target mailnn.service
 493 JoinsNamespaceOf=mailnn.service
 494 BindsTo=mailnn.service
 495 StartLimitIntervalSec=0
 496
 497 [Service]
 498 PrivateNetwork=true
 499 # i dont think we need any of these, but it doesnt hurt to stay consistent
 500 BindPaths=$bindpaths
 501
 502 Restart=on-failure
 503 RestartSec=20
 504 EOF
 505     ;;
 506 esac
 507
 508
 509 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 510 i /etc/systemd/system/mailvpn.service <<EOF
 511 [Unit]
 512 Description=OpenVPN tunnel for mail
 513 After=syslog.target network-online.target mailnn.service
 514 Wants=network-online.target
 515 Documentation=man:openvpn(8)
 516 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 517 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 518 # needed to continually restatr
 519 JoinsNamespaceOf=mailnn.service
 520 BindsTo=mailnn.service
 521 StartLimitIntervalSec=0
 522
 523 [Service]
 524 Type=notify
 525 RuntimeDirectory=openvpn-client
 526 RuntimeDirectoryMode=0710
 527 WorkingDirectory=/etc/openvpn/client
 528 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 529 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 530 LimitNPROC=10
 531 # DeviceAllow=/dev/null rw
 532 # DeviceAllow=/dev/net/tun rw
 533 PrivateNetwork=true
 534 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 535 # because of
 536 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 537 # there is a workaround there, but i dont think its really worth it,
 538 # the mail server is fine with a static dns anyways.
 539 # This thread is also interesting,
 540 # https://github.com/slingamn/namespaced-openvpn/issues/7
 541 # todo: the iptables rule at the bottom could be useful to prevent
 542 # dns from leaking in my network namespaced vpn.
 543 # I also like the idea of patching systemd-resolved so it
 544 # will listen on other interfaces, but its not worth my time.
 545 BindPaths=$bindpaths
 546 Restart=always
 547 # time to sleep before restarting a service
 548 RestartSec=20
 549
 550 [Install]
 551 WantedBy=multi-user.target
 552 EOF
 553
 554 i /etc/systemd/system/mailnnroute.service <<'EOF'
 555 [Unit]
 556 Description=Network routing for mailnn
 557 After=syslog.target network-online.target mailnn.service
 558 Wants=network-online.target
 559 JoinsNamespaceOf=mailnn.service
 560 BindsTo=mailnn.service
 561 StartLimitIntervalSec=0
 562
 563 [Service]
 564 Type=simple
 565 RemainAfterExit=true
 566 PrivateNetwork=true
 567 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 568 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 569 Restart=always
 570 RestartSec=20
 571
 572
 573 [Install]
 574 WantedBy=multi-user.target
 575 EOF
 576
 577 #
 578 i /etc/systemd/system/mailnn.service <<'EOF'
 579 [Unit]
 580 Description=Network Namespace for mail vpn service that will live forever and cant fail
 581 After=syslog.target network-online.target
 582 Wants=network-online.target
 583
 584 [Service]
 585 Type=simple
 586 PrivateNetwork=true
 587 ExecStart=/bin/sleep infinity
 588
 589 [Install]
 590 WantedBy=multi-user.target
 591 EOF
 592
 593 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 594 [Unit]
 595 Description=Watchdog to restart services relying on systemd-resolved dir
 596 After=syslog.target network-online.target
 597 Wants=network-online.target
 598 BindsTo=mailnn.service
 599
 600 [Service]
 601 Type=simple
 602 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 603 Restart=always
 604 # time to sleep before restarting a service
 605 RestartSec=10
 606
 607 [Install]
 608 WantedBy=multi-user.target
 609 EOF
 610
 611
 612
 613 # old service name
 614 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 615
 616 # We use a local unbound because systemd-resolved wont accept our
 617 # request, it will only listen to 127.0.0.53 in the main network
 618 # namespace, and rejected feature requests to change that (although I
 619 # could change the code and recompile), but anyways, that could answer
 620 # with things specific to the lan that aren't applicable in this
 621 # namespace, and since unbound is a recursive resolver, it means we just
 622 # use our own ip against dnsbl rate limits.
 623 #
 624 # If we ever notice this change, chattr +i on it
 625 # trust-ad is used in t10+, glibc 2.31
 626
 627 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 628 nameserver 127.0.0.1
 629 options edns0 trust-ad
 630 EOF
 631
 632 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 633 nameserver 127.0.0.53
 634 options edns0 trust-ad
 635 EOF
 636
 637
 638 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 639 nameserver 10.173.8.1
 640 options edns0 trust-ad
 641 EOF
 642
 643 # this is just a bug fix for trisquel.
 644 f=/etc/apparmor.d/usr.sbin.unbound
 645 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 646 if ! grep -qFx "$line" $f; then
 647   badline="/usr/sbin/unbound {"
 648   if ! grep -qFx "$badline" $f; then
 649     err expected line in $f not found
 650   fi
 651   sed -i "s,^$badline$,$line," $f
 652   if systemctl is-active apparmor &>/dev/null; then
 653     m systemctl reload apparmor
 654   fi
 655 fi
 656
 657 # note: anything added to nn_progs needs corresponding rm
 658 # down below in the host switch
 659 nn_progs=(exim4)
 660 if mailhost; then
 661   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 662   # Its in the nn so remote clients can connect to it.
 663   nn_progs+=(spamassassin dovecot)
 664 fi
 665
 666 case $HOSTNAME in
 667   $MAIL_HOST)
 668     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 669 [Unit]
 670 After=mailnn.service
 671 JoinsNamespaceOf=mailnn.service
 672 BindsTo=mailnn.service
 673 StartLimitIntervalSec=0
 674
 675 [Service]
 676 PrivateNetwork=true
 677 # note the nsswitch bind is actually not needed for bk, but
 678 # its the same file so it does no harm.
 679 BindPaths=$bindpaths
 680
 681 Restart=always
 682 RestartSec=20
 683 EOF
 684
 685     # sooo, there are a few ways to get traffic from the mail network
 686     # namespace to go over the wghole.
 687     #
 688     #1: unify the mail vpn and wghole
 689     # into 1 network.  this seems simple and logical, so I'm doing it.
 690     # One general downside is tying things together, if I need to mess
 691     # with one thing, it breaks the other. Oh well for now.
 692     #
 693     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 694     #
 695     # 3. We can setup the routing to happen on li, which seemed like I
 696     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 697     # wghole clients, but I think that is kind of hacky and breaks ipv4
 698     # routing within the mailvpn, it happened to work just because exim
 699     # prefers ipv6 and that was also available in the mailvpn.
 700     #
 701     # 4. Put the hole interface into the mail network namespace. This
 702     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 703     # vpn routing and establishes a direct connection.  I only use the
 704     # hole vpn for randomish things, it should be fine to join the mail
 705     # nn for that. There should be some way to fix the routing issue
 706     # by doing manual routing, but that doesn't seem like a good use of time.
 707     # relevant:
 708     # https://www.wireguard.com/netns/#
 709     #
 710     # for wireguard debugging
 711     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 712     # dmesg -w
 713
 714     ;;&
 715   $MAIL_HOST|bk)
 716     for unit in ${nn_progs[@]}; do
 717       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 718 [Unit]
 719 # commented for old openvpn
 720 Requires=$vpnser
 721 After=network.target mailnn.service $vpnser
 722 JoinsNamespaceOf=mailnn.service
 723 BindsTo=mailnn.service
 724 StartLimitIntervalSec=0
 725
 726 [Service]
 727 PrivateNetwork=true
 728 # note the nsswitch bind is actually not needed for bk, but
 729 # its the same file so it does no harm.
 730 BindPaths=$bindpaths
 731
 732 Restart=always
 733 RestartSec=20
 734 EOF
 735     done
 736     ;;
 737   *)
 738     for unit in exim4 spamassassin dovecot unbound; do
 739       f=/etc/systemd/system/$unit.service.d/nn.conf
 740       if [[ -s $f ]]; then
 741         rm -fv $f
 742         reload=true
 743       fi
 744     done
 745     ;;
 746 esac
 747
 748 # * spamassassin config
 749 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 750 # see exim spec
 751 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 752 EOF
 753 if $ir; then
 754   m sysctl -p
 755 fi
 756
 757 i /etc/spamassassin/mylocal.cf <<'EOF'
 758 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 759
 760 # /usr/share/doc/exim4-base/README.Debian.gz:
 761 #   SpamAssassin's default report should not be used in a add_header
 762 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 763 #   warning "BAD HEADER SECTION, Improper folded header field made up
 764 #   entirely of whitespace".) This is a safe, terse alternative:
 765 clear_report_template
 766 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 767 uridnsbl_skip_domain iankelling.org
 768 uridnsbl_skip_domain amnimal.ninja
 769 uridnsbl_skip_domain expertpathologyreview.com
 770 uridnsbl_skip_domain zroe.org
 771 EOF
 772
 773 # 2020-10-19 remove old file. remove this when all hosts updated
 774 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 775
 776 i /etc/default/spamassassin <<'EOF'
 777 # defaults plus debugging flags for an issue im having
 778 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 779 PIDFILE="/var/run/spamd.pid"
 780 # my additions
 781 NICE="--nicelevel 15"
 782 CRON=1
 783 EOF
 784 #####   end spamassassin config
 785
 786
 787 # * Update mail cert
 788 if [[ -e /p/c/filesystem ]]; then
 789   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 790   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 791   # after my internet was down for a bit:
 792   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 793   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 794 fi
 795 case $HOSTNAME in
 796   bk)
 797     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 798       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 799       exit 1
 800     fi
 801     ;;
 802 esac
 803
 804 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 805
 806 i /etc/systemd/system/mailcert.service <<'EOF'
 807 [Unit]
 808 Description=Mail cert rsync
 809 After=multi-user.target
 810
 811 [Service]
 812 Type=oneshot
 813 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 814 EOF
 815 i /etc/systemd/system/mailcert.timer <<'EOF'
 816 [Unit]
 817 Description=Run mail-cert once a day
 818
 819 [Timer]
 820 OnCalendar=daily
 821
 822 [Install]
 823 WantedBy=timers.target
 824 EOF
 825
 826
 827 wghost=${HOSTNAME}wg.b8.nz
 828 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 829   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 830           certonly --manual --preferred-challenges=dns \
 831           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 832           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 833           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 834 fi
 835
 836 # * common exim4 config
 837
 838
 839 ## old, not using forward files anymore
 840 rm -fv $uhome/.forward /root/.forward
 841
 842
 843 # Make all system users be aliases. preventative
 844 # prevents things like cron mail for user without alias
 845 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 846   if [[ ! $user ]]; then
 847     continue
 848   fi
 849   if ! grep -q "^$user:" /etc/aliases; then
 850     echo "$user: root" |m tee -a /etc/aliases
 851   fi
 852 done
 853
 854
 855 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 856   case $HOSTNAME in
 857     $MAIL_HOST)
 858       sed -i "/^user:/d" /etc/aliases
 859       ;;
 860     *)
 861       if ! grep -q "^$user:" /etc/aliases; then
 862         echo "$user: root" |m tee -a /etc/aliases
 863       fi
 864       ;;
 865   esac
 866 done
 867
 868 if ! grep -q "^ncsoft:" /etc/aliases; then
 869   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
 870 fi
 871
 872
 873
 874 m gpasswd -a iank adm #needed for reading logs
 875
 876 ### make local bounces go to normal maildir
 877 # local mail that bounces goes to /Maildir or /root/Maildir
 878 dirs=(/m/md/bounces/{cur,tmp,new})
 879 m mkdir -p ${dirs[@]}
 880 m chown iank:iank /m /m/md
 881 m ln -sfT /m/md /m/iank
 882 m chmod 771 /m /m/md
 883 m chown -R $u:Debian-exim /m/md/bounces
 884 m chmod 775 ${dirs[@]}
 885 m usermod -a -G Debian-exim $u
 886 for d in /Maildir /root/Maildir; do
 887   if [[ ! -L $d ]]; then
 888     m rm -rf $d
 889   fi
 890   m ln -sf -T /m/md/bounces $d
 891 done
 892
 893 # dkim, client passwd file
 894 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
 895 f=/p/c/filesystem/etc/exim4/passwd.client
 896 if [[ -e $f ]]; then
 897   files+=($f)
 898 fi
 899 if (( ${#files[@]} )); then
 900   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
 901     ${files[@]} /etc/exim4
 902 fi
 903
 904 # by default, only 10 days of logs are kept. increase that.
 905 m sed -ri 's/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
 906
 907
 908 ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
 909 # i only need .forwards, so just doing that one.
 910 cd /etc/exim4/conf.d/router
 911 b=userforward_higher_priority
 912 # replace the router name so it is unique
 913 sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
 914
 915 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
 916
 917 # alerts is basically the postmaster address
 918 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
 919 \$a root: alerts@iankelling.org
 920 /^root:/d
 921 EOF
 922
 923 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
 924 ncsoft@zroe.org graceq2323@gmail.com hE
 925 EOF
 926
 927 # old name
 928 rm -fv /etc/exim4/conf.d/retry/37_retry
 929
 930 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
 931 # Retry fast for my own domains
 932 iankelling.org * F,1d,10m;F,14d,1h
 933 amnimal.ninja * F,1d,10m;F,14d,1h
 934 expertpathologyreview.com * F,1d,10m;F,14d,1h
 935 je.b8.nz * F,1d,10m;F,14d,1h
 936 zroe.org * F,1d,10m;F,14d,1h
 937 eximbackup.b8.nz * F,1d,4m;F,14d,1h
 938 EOF
 939
 940
 941 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
 942 cat >/etc/exim4/conf.d/main/000_local <<EOF
 943 MAIN_TLS_ENABLE = true
 944
 945 # require tls connections for all smarthosts
 946 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
 947
 948 # debian exim config added this in 2016 or so?
 949 # it's part of the smtp spec, to limit lines to 998 chars
 950 # but a fair amount of legit mail does not adhere to it. I don't think
 951 # this should be default, like it says in
 952 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
 953 # todo: the bug for introducing this was about headers, but
 954 # the fix maybe is for all lines? one says gmail rejects, the
 955 # other says gmail does not reject. figure out and open a new bug.
 956 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
 957
 958 # more verbose logs
 959 MAIN_LOG_SELECTOR = +all
 960
 961 # Based on spec, seems like a good idea to be nice.
 962 smtp_return_error_details = true
 963
 964 # normally empty, I set this so I can set the envelope address
 965 # when doing mail redelivery to invoke filters. Also allows
 966 # me exiqgrep and stuff.
 967 MAIN_TRUSTED_GROUPS = $u
 968
 969 # default is 10. when exim has been down for a bit, fsf mailserver
 970 # will do a big send in one connection, then exim decides to put
 971 # the messages in the queue instead of delivering them, to avoid
 972 # spawning too many delivery processes. This is the same as the
 973 # fsfs value. And the corresponding one for how many messages
 974 # to send out in 1 connection remote_max_parallel = 256
 975 smtp_accept_queue_per_connection = 500
 976
 977
 978 DKIM_CANON = relaxed
 979 DKIM_SELECTOR = li
 980
 981 # from comments in
 982 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 983 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
 984 # There could be some circumstance when the
 985 # from: isnt our domain, but the envelope sender is
 986 # and so still want to sign, but I cant think of any case.
 987 DKIM_DOMAIN = \${lc:\${domain:\$rh_from:}}
 988 # The file is based on the outgoing domain-name in the from-header.
 989 # sign if key exists
 990 DKIM_PRIVATE_KEY = \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
 991
 992 # most of the ones that gmail seems to use.
 993 # Exim has horrible default of signing unincluded
 994 # list- headers since they got mentioned in an
 995 # rfc, but this messes up mailing lists, like gnu/debian which want to
 996 # keep your dkim signature intact but add list- headers.
 997 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
 998
 999 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1000
1001 hostlist iank_trusted = <; \\
1002 # veth0
1003 10.173.8.1 ; \\
1004 # li li_ip6
1005 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \\
1006 # li_vpn_net li_vpn_net_ip6s
1007 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \\
1008 # bk bk_ip6
1009 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \\
1010 # je je_ipv6
1011 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \\
1012 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1013 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1014 EOF
1015
1016 rm -fv /etc/exim4/rcpt_local_acl # old path
1017
1018 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1019 # This acl already exists in rcpt, this just makes it more widespread.
1020 # See the comment there for its rationale. The reason it needs to be
1021 # more widespread is that I've turned on sender verification, but cron
1022 # emails can fail sender verification since I may be in a network that
1023 # doesn't have my local dns.
1024 accept
1025   authenticated = *
1026
1027 # i setup a local programs smtp to mail.iankelling.org, this
1028 # skips sender verification for it.
1029 accept
1030   hosts = 10.173.8.1
1031 EOF
1032
1033 rm -fv /etc/exim4/data_local_acl # old path
1034 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1035 # Except for the "condition =", this was
1036 # a comment in the check_data acl. The comment about this not
1037 # being suitable has been changed in newer exim versions. The only thing
1038 # related I found was to
1039 # add the condition =, cuz spamassassin has problems with big
1040 # messages and spammers don't bother with big messages,
1041 # but I've increased the size from 10k
1042 # suggested in official docs, and 100k in the wiki example because
1043 # those docs are rather old and I see a 110k spam message
1044 # pretty quickly looking through my spam folder.
1045
1046 warn
1047   !hosts = +iank_trusted
1048   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1049
1050 warn
1051   !hosts = +iank_trusted
1052   condition = ${if < {$message_size}{5000K}}
1053   spam = Debian-exim:true
1054   add_header = X-Spam_score_int: $spam_score_int
1055   add_header = X-Spam_score: $spam_score
1056   add_header = X-Spam_bar: $spam_bar
1057   add_header = X-Spam_report: $spam_report
1058   add_header = X-Spam_action: $spam_action
1059
1060 warn
1061   condition = ${if def:malware_name}
1062   remove_header = Subject:
1063   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1064   log_message = heuristic malware warning: $malware_name
1065
1066 #accept
1067 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1068 #  dmarc_status = reject:quarantine
1069 #  add_header = Reply-to: dmarctest@iankelling.org
1070
1071 EOF
1072
1073 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<EOF
1074 ### router/900_exim4-config_local_user
1075 #################################
1076
1077 # This router matches local user mailboxes. If the router fails, the error
1078 # message is "Unknown user".
1079 local_user:
1080   debug_print = "R: local_user for \$local_part@\$domain"
1081   driver = accept
1082   domains = +local_domains
1083 # ian: default file except where mentioned.
1084 # ian: commented this. I get all local parts. for bk, an rcpt
1085 # check handles checking with dovecot, and the only router
1086 # after this is root.
1087 #  local_parts = ! root
1088   transport = LOCAL_DELIVERY
1089   cannot_route_message = Unknown user
1090 # ian: added for + addressing.
1091   local_part_suffix = +*
1092   local_part_suffix_optional
1093 EOF
1094 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1095 dovecot_lmtp:
1096   driver = lmtp
1097   socket = /var/run/dovecot/lmtp
1098   #maximum number of deliveries per batch, default 1
1099   batch_max = 200
1100   envelope_to_add
1101 EOF
1102
1103 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1104 # same as debians 30_exim4-config_remote_smtp, but
1105 # with interface added at the end.
1106
1107 remote_smtp_vpn:
1108   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1109   driver = smtp
1110 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1111   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1112 .endif
1113 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1114   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1115 .endif
1116 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1117   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1118 .endif
1119 .ifdef REMOTE_SMTP_RETURN_PATH
1120   return_path = REMOTE_SMTP_RETURN_PATH
1121 .endif
1122 .ifdef REMOTE_SMTP_HELO_DATA
1123   helo_data=REMOTE_SMTP_HELO_DATA
1124 .endif
1125 .ifdef DKIM_DOMAIN
1126 dkim_domain = DKIM_DOMAIN
1127 .endif
1128 .ifdef DKIM_SELECTOR
1129 dkim_selector = DKIM_SELECTOR
1130 .endif
1131 .ifdef DKIM_PRIVATE_KEY
1132 dkim_private_key = DKIM_PRIVATE_KEY
1133 .endif
1134 .ifdef DKIM_CANON
1135 dkim_canon = DKIM_CANON
1136 .endif
1137 .ifdef DKIM_STRICT
1138 dkim_strict = DKIM_STRICT
1139 .endif
1140 .ifdef DKIM_SIGN_HEADERS
1141 dkim_sign_headers = DKIM_SIGN_HEADERS
1142 .endif
1143 .ifdef TLS_DH_MIN_BITS
1144 tls_dh_min_bits = TLS_DH_MIN_BITS
1145 .endif
1146 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1147 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1148 .endif
1149 .ifdef REMOTE_SMTP_PRIVATEKEY
1150 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1151 .endif
1152 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1153   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1154 .endif
1155 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1156   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1157 .endif
1158   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1159 EOF
1160
1161 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1162 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1163
1164 smarthost_dkim:
1165   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1166   driver = smtp
1167   multi_domain
1168 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1169   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1170 .endif
1171   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1172         {\
1173         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1174         }\
1175         {} \
1176       }
1177 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1178   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1179 .endif
1180 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1181   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1182 .endif
1183 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1184   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1185 .endif
1186 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1187   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1188 .endif
1189 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1190   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1191 .endif
1192 .ifdef REMOTE_SMTP_RETURN_PATH
1193   return_path = REMOTE_SMTP_RETURN_PATH
1194 .endif
1195 .ifdef REMOTE_SMTP_HELO_DATA
1196   helo_data=REMOTE_SMTP_HELO_DATA
1197 .endif
1198 .ifdef TLS_DH_MIN_BITS
1199 tls_dh_min_bits = TLS_DH_MIN_BITS
1200 .endif
1201 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1202 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1203 .endif
1204 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1205 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1206 .endif
1207 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1208   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1209 .endif
1210 .ifdef DKIM_DOMAIN
1211 dkim_domain = DKIM_DOMAIN
1212 .endif
1213 .ifdef DKIM_SELECTOR
1214 dkim_selector = DKIM_SELECTOR
1215 .endif
1216 .ifdef DKIM_PRIVATE_KEY
1217 dkim_private_key = DKIM_PRIVATE_KEY
1218 .endif
1219 .ifdef DKIM_CANON
1220 dkim_canon = DKIM_CANON
1221 .endif
1222 .ifdef DKIM_STRICT
1223 dkim_strict = DKIM_STRICT
1224 .endif
1225 .ifdef DKIM_SIGN_HEADERS
1226 dkim_sign_headers = DKIM_SIGN_HEADERS
1227 .endif
1228 EOF
1229
1230
1231 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1232 # default stuff, i havent checked if its needed
1233 dc_minimaldns='false'
1234 dc_relay_nets=''
1235 CFILEMODE='644'
1236 dc_use_split_config='true'
1237 dc_mailname_in_oh='true'
1238 EOF
1239
1240
1241 # * radicale
1242 if mailhost; then
1243   if ! mountpoint /o; then
1244     echo "error /o is not a mountpoint" >&2
1245     exit 1
1246   fi
1247
1248   # davx/davdroid setup instructions at the bottom
1249
1250   # main docs:
1251   # http://radicale.org/user_documentation/
1252   # https://davdroid.bitfire.at/configuration/
1253
1254   # note on debugging: if radicale can't bind to the address,
1255   # in the log it just says "Starting Radicale". If you run
1256   # it in the foreground, it will give more info. Background
1257   # plus debug does not help.
1258   # sudo -u radicale radicale -D -f
1259
1260   # created password file with:
1261   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1262   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1263   # # setup chgrp www-data in ./conflink
1264
1265   pi-nostart radicale
1266
1267   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1268 [Unit]
1269 # this unit is configured to start and stop whenever
1270 # $vpnser does
1271
1272 After=network.target network-online.target mailnn.service $vpnser
1273 BindsTo=$vpnser
1274
1275 Wants=network-online.target
1276 JoinsNamespaceOf=mailnn.service
1277 StartLimitIntervalSec=0
1278
1279 [Service]
1280 PrivateNetwork=true
1281 BindPaths=$bindpaths
1282 Restart=always
1283 # time to sleep before restarting a service
1284 RestartSec=20
1285
1286 [Install]
1287 # for openvpn
1288 RequiredBy=$vpnser
1289 EOF
1290
1291
1292   # use persistent uid/gid
1293   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1294   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1295   if [[ $uid != 609 ]]; then
1296     m systemctl stop radicale ||:
1297     m usermod -u 609 radicale
1298     m groupmod -g 609 radicale
1299     m usermod -g 609 radicale
1300   fi
1301   m find /o/radicale  -xdev -exec chown -h 609 {} +
1302   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1303
1304
1305   # I moved /var/lib/radicale after it's initialization.
1306   # I did a sudo -u radicale git init in the collections subfolder
1307   # after it gets created, per the git docs.
1308   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1309
1310   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1311
1312   # more config is for li in distro-end
1313
1314   # coment in this file says this is needed for it to run on startup
1315   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1316
1317   # comments say default is 0.0.0.0:5232
1318   m setini hosts 10.8.0.4:5232 server
1319   # https://radicale.org/2.1.html
1320   m setini type http_x_remote_user auth
1321
1322
1323   # disable power management feature, set to 240 min sync interval,
1324   # so it shouldn't be bad.
1325
1326   # davdroid from f-druid.
1327   # login with url and user name
1328   # url https://cal.iankelling.org/ian
1329   # username ian
1330   # pass, see password manager for radicale
1331   #
1332   # add account dialog:
1333   #
1334   # set account name as ian@iankelling.org, per help text below the
1335   # field.
1336   #
1337   # switch to groups are per-contact categories,
1338   # per https://davdroid.bitfire.at/configuration/radicale/
1339   #
1340   #
1341   # After setting up account, I added one address book, named
1342   # ianaddr. calender was already created, named ian. checked boxes under
1343   # both. synced.
1344   #
1345   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1346   #
1347   # ignorable background info:
1348   #
1349   # opentasks uses the calendar file.
1350   #
1351   # The address book I created got a uuid as a name for the file. Note
1352   # the .props file says if it's a calendar or addressbook.
1353   #
1354   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1355   # both show the requests happening. Without creating the address book,
1356   # after creating a contact, a sync would delete it.
1357   #
1358   # Address books correspond to .props files in the radicale dir.
1359   #
1360   #  Some background is here,
1361   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1362   # which shows separate vcard option is from rfc 6350, the other is 2426,
1363   # radicale page says it implements the former not the latter,
1364   # which conflicts with the documentation of which to select, but whatever.
1365   # http://radicale.org/technical_choices/
1366   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1367   #
1368   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1369
1370   # Note, radicale had built-in git support to track changes, but they
1371   # removed it in 2.0.
1372
1373 fi
1374
1375 # * dovecot
1376
1377 # ** $MAIL_HOST|bk|je)
1378 case $HOSTNAME in
1379   $MAIL_HOST|bk|je)
1380     # based on a little google and package search, just the dovecot
1381     # packages we need instead of dovecot-common.
1382     #
1383     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1384     # directly.  The reason to do this is to use dovecot\'s sieve, which
1385     # can generally do more than exims filters (a few things less) and
1386     # sieve has the benefit of being supported in postfix and
1387     # proprietary/weird environments, so there is more examples on the
1388     # internet.
1389     pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1390
1391     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1392       if [[ -e $f ]]; then
1393         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1394         break
1395       fi
1396     done
1397     for f in /p/c/subdir_files/sieve/*sieve /a/c/subdir_files/sieve/*sieve; do
1398       m sudo -u $u /a/exe/lnf -T $f $uhome/sieve/${f##*/}
1399     done
1400
1401     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1402     i /etc/dovecot/dhparam <<'EOF'
1403 -----BEGIN DH PARAMETERS-----
1404 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1405 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1406 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1407 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1408 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1409 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1410 -----END DH PARAMETERS-----
1411 EOF
1412     {
1413       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1414         cat <<'EOF'
1415 ssl_cert = </etc/exim4/fullchain.pem
1416 ssl_key = </etc/exim4/privkey.pem
1417 EOF
1418       else
1419         cat <<'EOF'
1420 ssl_cert = </etc/exim4/exim.crt
1421 ssl_key = </etc/exim4/exim.key
1422 EOF
1423       fi
1424       cat <<EOF
1425 # https://ssl-config.mozilla.org
1426 ssl = required
1427 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1428 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
1429 ssl_protocols = TLSv1.2
1430 ssl_prefer_server_ciphers = no
1431
1432 protocol lmtp {
1433 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1434 # default is just \$mail_plugins
1435   mail_plugins = \$mail_plugins sieve
1436 }
1437 EOF
1438       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1439         cat <<EOF
1440 ssl_dh = </etc/dovecot/dhparam
1441 EOF
1442       fi
1443     } >/etc/dovecot/local.conf
1444
1445     ;;&
1446
1447   # **  $MAIL_HOST)
1448   $MAIL_HOST)
1449     # If we changed 90-sieve.conf and removed the active part of the
1450     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1451     # default config if not needed. This won\'t work as a symlink in /a/c
1452     # unfortunately.
1453     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1454
1455     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1456       m touch $uhome/sieve/personal{,end}{,test}.sieve
1457     fi
1458
1459     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1460     cat >>/etc/dovecot/local.conf <<EOF
1461 # simple password file based login
1462 !include conf.d/auth-passwdfile.conf.ext
1463
1464 # ian: %u is used for alerts user vs iank
1465 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1466 mail_uid = $u
1467 mail_gid = $u
1468
1469 protocol lmtp {
1470 # For a normal setup with exim, we need something like this, which
1471 # removes the domain part
1472 #  auth_username_format = %Ln
1473 #
1474 #  or else # Exim says something like
1475 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1476 # Dovecot verbose log says something like
1477 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1478 # reference: http://wiki.dovecot.org/LMTP/Exim
1479 #
1480 # However, I use this to direct all mail to the same inbox.
1481 # A normal way to do this, which I did at first is to have
1482 # a router in exim almost at the end, eg 950,
1483 #local_catchall:
1484 #  debug_print = "R: catchall for \$local_part@\$domain"
1485 #  driver = redirect
1486 #  domains = +local_domains
1487 #  data = $u
1488 # based on
1489 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1490 # with superflous options removed.
1491 # However, this causes the envelope to be rewritten,
1492 # which makes filtering into mailboxes a little less robust or more complicated,
1493 # so I've done it this way instead. it also requires
1494 # modifying the local router in exim.
1495   auth_username_format = $u
1496 }
1497 EOF
1498     ;;&
1499   # **  bk|je)
1500   bk|je)
1501     chown -R mail.mail /m/md
1502
1503     f=/etc/dovecot/conf.d/10-auth.conf
1504     if [[ -e $f ]]; then
1505       mv $f $f-iank-disabled
1506     fi
1507
1508     cat >>/etc/dovecot/local.conf <<EOF
1509 !include /etc/dovecot/local.conf.ext
1510
1511 # for debugging info, uncomment these.
1512 # logs go to syslog and to /var/log/mail.log
1513 #auth_verbose=yes
1514 #mail_debug=yes
1515
1516
1517 protocol lmtp {
1518 # This downcases the localpart. default is case sensitive.
1519 # case sensitive local part will miss out on valid email when some person or system
1520 # mistakenly capitalizes things.
1521   auth_username_format = %Lu
1522 }
1523
1524 # make 147 only listen on localhost, plan to use for nextcloud.
1525 # copied from mailinabox
1526 service imap-login {
1527   inet_listener imap {
1528     address = 127.0.0.1
1529   }
1530 }
1531 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1532 service auth {
1533   unix_listener auth-client {
1534     user = Debian-exim
1535     group = Debian-exim
1536   }
1537 }
1538
1539
1540 plugin {
1541   sieve_before = /etc/dovecot/sieve-spam.sieve
1542   # from mailinabox
1543   sieve = /m/sieve/%d/%n.sieve
1544   sieve_dir = /m/sieve/%d/%n
1545 }
1546
1547
1548 # all taken from mailinabox.
1549 mail_location = maildir:/m/md/%d/%n
1550 # meh, ok.
1551 mail_privileged_group = mail
1552 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1553 first_valid_uid = 1
1554
1555 # todo: test these changes in the universal config
1556 # mailboxes taken from mailinabox but removed
1557 # settings duplicate to defaults
1558 namespace inbox {
1559   mailbox INBOX {
1560     auto = subscribe
1561   }
1562   mailbox Spam {
1563     special_use = \Junk
1564     auto = subscribe
1565   }
1566   mailbox Drafts {
1567     auto = subscribe
1568   }
1569   mailbox Sent {
1570     auto = subscribe
1571   }
1572   mailbox Trash {
1573     auto = subscribe
1574   }
1575   mailbox Archive {
1576     special_use = \Archive
1577     auto = subscribe
1578   }
1579 }
1580 auth_mechanisms = plain login
1581 EOF
1582
1583     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1584 require ["regex", "fileinto", "imap4flags"];
1585
1586 if allof (header :regex "X-Spam-Status" "^Yes") {
1587   fileinto "Spam";
1588   stop;
1589 }
1590 EOF
1591
1592     i /etc/dovecot/local.conf.ext <<'EOF'
1593 passdb {
1594   driver = sql
1595   args = /etc/dovecot/dovecot-sql.conf.ext
1596 }
1597 userdb {
1598   driver = sql
1599   args = /etc/dovecot/dovecot-sql.conf.ext
1600 }
1601
1602 EOF
1603
1604     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1605 # from mailinabox
1606 driver = sqlite
1607 connect = /m/rc/users.sqlite
1608 default_pass_scheme = SHA512-CRYPT
1609 password_query = SELECT email as user, password FROM users WHERE email='%u';
1610 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1611 iterate_query = SELECT email AS user FROM users;
1612 EOF
1613     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1614
1615     # db needs to be in a www-data writable directory
1616     db=/m/rc/users.sqlite
1617     if [[ ! -s $db ]]; then
1618       m mkdir -p /m/rc
1619       m sqlite3 $db <<'EOF'
1620 CREATE TABLE users (
1621 id INTEGER PRIMARY KEY AUTOINCREMENT,
1622 email TEXT NOT NULL UNIQUE,
1623 password TEXT NOT NULL,
1624 extra,
1625 privileges TEXT NOT NULL DEFAULT '');
1626 EOF
1627     fi
1628     # example of adding a user:
1629     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1630     # sqlite3 /m/rc/users.sqlite <<'EOF'
1631     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1632     #EOF
1633     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1634
1635     # this should be at the end since it requires a valid dovecot config
1636     m sievec /etc/dovecot/sieve-spam.sieve
1637     ;;&
1638   # **  bk)
1639   bk)
1640     # roundcube uses this
1641     mkdir -p /m/sieve
1642     chown mail.mail /m/sieve
1643     m pi dovecot-managesieved
1644     ;;
1645 esac
1646
1647 # * thunderbird autoconfig setup
1648
1649 bkdomains=(expertpathologyreview.com amnimal.ninja)
1650 if [[ $HOSTNAME == bk ]]; then
1651   for domain in ${bkdomains[@]}; do
1652     m /a/exe/web-conf apache2 autoconfig.$domain
1653     dir=/var/www/autoconfig.$domain/html/mail
1654     m mkdir -p $dir
1655     # taken from mailinabox
1656     i $dir/config-v1.1.xml <<EOF
1657 <?xml version="1.0" encoding="UTF-8"?>
1658 <clientConfig version="1.1">
1659     <emailProvider id="$domain">
1660       <domain>$domain</domain>
1661
1662       <displayName>$domain Mail</displayName>
1663       <displayShortName>$domain</displayShortName>
1664
1665       <incomingServer type="imap">
1666          <hostname>mail2.iankelling.org</hostname>
1667          <port>993</port>
1668          <socketType>SSL</socketType>
1669          <username>%EMAILADDRESS%</username>
1670          <authentication>password-cleartext</authentication>
1671       </incomingServer>
1672
1673       <outgoingServer type="smtp">
1674          <hostname>mail2.iankelling.org</hostname>
1675          <port>587</port>
1676          <socketType>STARTTLS</socketType>
1677          <username>%EMAILADDRESS%</username>
1678          <authentication>password-cleartext</authentication>
1679          <addThisServer>true</addThisServer>
1680          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1681       </outgoingServer>
1682
1683       <documentation url="https://$domain/">
1684          <descr lang="en">$domain website.</descr>
1685       </documentation>
1686     </emailProvider>
1687
1688     <webMail>
1689       <loginPage url="https://$domain/roundcube" />
1690       <loginPageInfo url="https://$domain/roundcube" >
1691         <username>%EMAILADDRESS%</username>
1692         <usernameField id="rcmloginuser" name="_user" />
1693         <passwordField id="rcmloginpwd" name="_pass" />
1694         <loginButton id="rcmloginsubmit" />
1695       </loginPageInfo>
1696     </webMail>
1697     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1698 </clientConfig>
1699 EOF
1700   done
1701 fi
1702
1703 # * roundcube setup
1704
1705 if [[ $HOSTNAME == bk ]]; then
1706
1707   # zip according to /installer
1708   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1709   # $config['enable_installer'] = true;
1710   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1711
1712   ### begin composer install
1713   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1714   # cd $(mktemp -d)
1715   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1716   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1717   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1718   #   echo 'ERROR: Invalid composer installer checksum' >&2
1719   #   rm -fv composer-setup.php
1720   #   exit 1
1721   # fi
1722   # m php composer-setup.php --quiet
1723   # rm -fv composer-setup.php
1724   # m mv composer.phar /usr/local/bin
1725
1726   # the above method gets composer2, carddav plugin at least doesnt work with that
1727   # yet, it was just released 10-24-2020.
1728   m cd /usr/local/bin
1729   m wget -nv -N https://getcomposer.org/composer-1.phar
1730   chmod +x composer-1.phar
1731   ### end composer install
1732
1733   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1734   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1735   # point debian cronjob to our local install, preventing daily cron error
1736
1737   # debian's cronjob will fail, remove both paths it uses just to be sure
1738   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1739
1740   #### begin dl roundcube
1741   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1742   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1743   cd /a/opt
1744   if [[ -e $f ]]; then
1745     timestamp=$(stat -c %Y $f)
1746   else
1747     timestamp=0
1748   fi
1749   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1750   new_timestamp=$(stat -c %Y $f)
1751   for rcdir in ${rcdirs[@]}; do
1752     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1753       m tar -C /usr/local/lib --no-same-owner -zxf $f
1754       m rm -rf $rcdir
1755       m mv /usr/local/lib/roundcubemail-$v $rcdir
1756     fi
1757   done
1758   #### end dl roundcube
1759
1760   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1761     domain=${bkdomains[i]}
1762     rcdir=${rcdirs[i]}
1763     rcbase=${rcdir##*/}
1764     ncdir=${ncdirs[i]}
1765
1766     # copied from debians cronjob
1767     i /etc/cron.d/$rcbase <<EOF
1768 #  Roundcube database cleaning: finally removes all records that are
1769 #  marked as deleted.
1770 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1771 EOF
1772
1773     m /a/exe/web-conf - apache2 $domain <<EOF
1774 Alias /roundcube $rcdir
1775 ### begin roundcube settings
1776 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1777 <Directory $rcdir/>
1778   Options +FollowSymLinks
1779   # This is needed to parse $rcdir/.htaccess.
1780   AllowOverride All
1781   Require all granted
1782 </Directory>
1783 # Protecting basic directories:
1784 <Directory $rcdir/config>
1785   Options -FollowSymLinks
1786   AllowOverride None
1787 </Directory>
1788 ### end roundcube settings
1789
1790
1791 ### begin nextcloud settings
1792 Alias /nextcloud "$ncdir/"
1793 <Directory $ncdir/>
1794   Require all granted
1795   AllowOverride All
1796   Options FollowSymLinks MultiViews
1797
1798   <IfModule mod_dav.c>
1799     Dav off
1800   </IfModule>
1801
1802 </Directory>
1803
1804 # based on install checker, links to
1805 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1806 # their example was a bit wrong, I figured it out by adding
1807 # LogLevel warn rewrite:trace5
1808 # then watching the apache logs
1809
1810 RewriteEngine on
1811 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
1812 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
1813 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
1814 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
1815 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
1816 ### end nextcloud settings
1817 EOF
1818     if [[ ! -e $rcdir/config/secret ]]; then
1819       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
1820     fi
1821     secret=$(cat $rcdir/config/secret)
1822
1823     rclogdir=/var/log/$rcbase
1824     rctmpdir=/var/tmp/$rcbase
1825     rcdb=/m/rc/$rcbase.sqlite
1826     # config from mailinabox
1827     i $rcdir/config/config.inc.php <<EOF
1828 <?php
1829 \$config = array();
1830 # debian creates this for us
1831 \$config['log_dir'] = '$rclogdir/';
1832 # debian also creates a temp dir, but it is under its install dir,
1833 # seems better to have our own.
1834 \$config['temp_dir'] = '$rctmpdir/';
1835 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
1836 \$config['default_host'] = 'ssl://localhost';
1837 \$config['default_port'] = 993;
1838 \$config['imap_conn_options'] = array(
1839   'ssl'         => array(
1840      'verify_peer'  => false,
1841      'verify_peer_name'  => false,
1842    ),
1843  );
1844 \$config['imap_timeout'] = 15;
1845 \$config['smtp_server'] = 'tls://127.0.0.1';
1846 \$config['smtp_conn_options'] = array(
1847   'ssl'         => array(
1848      'verify_peer'  => false,
1849      'verify_peer_name'  => false,
1850    ),
1851  );
1852 \$config['product_name'] = 'webmail';
1853 \$config['des_key'] = '$secret';
1854 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
1855 \$config['skin'] = 'elastic';
1856 \$config['login_autocomplete'] = 2;
1857 \$config['password_charset'] = 'UTF-8';
1858 \$config['junk_mbox'] = 'Spam';
1859 # disable builtin addressbook
1860 \$config['address_book_type'] = '';
1861 ?>
1862 EOF
1863
1864     m mkdir -p $rclogdir
1865     m chmod 750 $rclogdir
1866     m chown www-data:adm $rclogdir
1867     # note: subscribed to updates:
1868     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
1869     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
1870     m mkdir -p $rctmpdir /m/rc
1871     m chown -R www-data.www-data $rctmpdir /m/rc
1872     m chmod 750 $rctmpdir
1873     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
1874     # todo: setup fail2ban
1875     # todo: check for other mailinabox things
1876     m sudo -u www-data touch $rclogdir/errors.log
1877
1878     #### begin carddav install
1879     # This is the official roundcube carddav repo.
1880     # Install doc suggests downloading with composer, but that
1881     # didnt work, it said some ldap package for roundcube was missing,
1882     # but I dont want to download some extra ldap thing.
1883     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
1884     verf=$rcdir/plugins/carddav/myversion
1885     upgrade=false
1886     install=false
1887     v=4.0.0
1888     if [[ -e $verf ]]; then
1889       if [[ $(cat $verf) != "$v" ]]; then
1890         install=true
1891         upgrade=true
1892       fi
1893     else
1894       install=true
1895     fi
1896     if $install; then
1897       m rm -rf $rcdir/plugins/carddav
1898       tmpd=$(mktemp -d)
1899       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
1900       cd $rcdir/plugins
1901       tar xzf $tmpd/t.tgz
1902       rm -rf $tmpd
1903       m chown -R www-data:www-data $rcdir/plugins/carddav
1904       m cd $rcdir/plugins/carddav
1905       if $upgrade; then
1906         m sudo -u www-data composer-1.phar update --no-dev
1907       else
1908         m sudo -u www-data composer-1.phar install --no-dev
1909       fi
1910       m chown -R root:root $rcdir/plugins/carddav
1911       echo $v >$verf
1912     fi
1913
1914     # So, strangely, this worked in initial testing, but then
1915     # on first run it wouldn't show the existing contacts until
1916     # I went into the carddav settings and did "force immediate sync",
1917     # which seemed to fix things. Note, some of these settings
1918     # get initalized per/addressbook in the db, then need changing
1919     # there or through the settings menu.
1920
1921     # About categories, see https://www.davx5.com/tested-with/nextcloud
1922     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
1923     i $rcdir/plugins/carddav/config.inc.php <<EOF;
1924 <?php
1925 \$prefs['_GLOBAL']['hide_preferences'] = false;
1926 \$prefs['davserver'] = array(
1927 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
1928   'name'         =>  'Main',
1929   'username'     =>  '%u', // login username
1930   'password'     =>  '%p', // login password
1931   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
1932   'active'       =>  true,
1933   'readonly'     =>  false,
1934   'refresh_time' => '00:10:00',
1935   'fixed'        =>  array('username','password'),
1936   'use_categories' => false,
1937   'hide'        =>  false,
1938 );
1939 ?>
1940 EOF
1941     #### end carddav install
1942
1943     cd $rcdir/plugins
1944     if [[ ! -d html5_notifier ]]; then
1945       m git clone https://github.com/stremlau/html5_notifier
1946     fi
1947     cd $rcdir/plugins/html5_notifier
1948     m git pull --rebase
1949
1950     # todo: try out roundcube plugins: thunderbird labels
1951
1952     # Password changing plugin settings
1953     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
1954 # following are from mailinabox
1955 $config['password_minimum_length'] = 8;
1956 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
1957 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
1958 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
1959 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
1960 $config['password_dovecotpw_with_method'] = true;
1961 EOF
1962     # so PHP can use doveadm, for the password changing plugin
1963     m usermod -a -G dovecot www-data
1964     m usermod -a -G mail $u
1965
1966     # so php can update passwords
1967     m chown www-data:dovecot /m/rc/users.sqlite
1968     m chmod 664 /m/rc/users.sqlite
1969
1970     # Run Roundcube database migration script (database is created if it does not exist)
1971     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
1972     m chown www-data:www-data $rcdb
1973     m chmod 664 $rcdb
1974   done # end loop over domains and rcdirs
1975
1976   ### begin php setup for rc ###
1977   # Enable PHP modules.
1978   m phpenmod -v php mcrypt imap
1979   # dpkg says this is required
1980   m a2enmod proxy_fcgi setenvif
1981   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
1982   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
1983   m a2enconf $fpm
1984   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
1985   # /etc/apache2/conf-enabled/php7.3-fpm.conf
1986   m a2dismod php$phpver
1987   # according to /install, we should set date.timezone,
1988   # but that is dumb, the system already has the right zone in
1989   # $rclogdir/errors.log
1990   # todo: consider other settings in
1991   # /a/opt/mailinabox/setup/nextcloud.sh
1992   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
1993 apc.enable_cli = 1
1994 EOF
1995
1996   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
1997 date.timezone = "America/New_York"
1998 # for nextcloud
1999 upload_max_filesize = 2000M
2000 post_max_size = 2000M
2001 # install checker, nextcloud/settings/admin/overview
2002 memory_limit = 512M
2003 EOF
2004   m systemctl restart $fpm
2005   # dunno if reload/restart is needed
2006   m systemctl reload apache2
2007   # note bk backups are defined in crontab outside this file
2008   ### end php setup for rc ###
2009
2010 fi # end roundcube setup
2011
2012 # * nextcloud setup
2013
2014 if [[ $HOSTNAME == bk ]]; then
2015   # from install checker, nextcloud/settings/admin/overview and
2016   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2017   # curl from the web installer requirement, but i switched to cli
2018   # it recommends php-file info, but that is part of php7.3-common, already got installed
2019   # with roundcube.
2020   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2021
2022   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2023   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2024 [www]
2025 clear_env = no
2026 EOF
2027
2028   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2029     domain=${bkdomains[i]}
2030     ncdir=${ncdirs[i]}
2031     ncbase=${ncdir##*/}
2032     m cd /var/www
2033     if [[ ! -e $ncdir/index.php ]]; then
2034       # if we wanted to only install a specific version, use something like
2035       # file=latest-22.zip
2036       file=latest.zip
2037       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2038       m rm -rf nextcloud
2039       m unzip -q $file
2040       m rm -f $file
2041       m chown -R www-data.www-data nextcloud
2042       m mv nextcloud $ncdir
2043       m cd $ncdir
2044       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2045     fi
2046     # note, strange this happend where updater did not increment the version var,
2047     # mine was stuck on 20. I manually updated it.
2048     m cd $ncdir/config
2049     if [[ ! -e config.php-orig ]]; then
2050       m cp -a config.php config.php-orig
2051     fi
2052     cat config.php-orig - >tmp.php <<EOF
2053 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2054 \$CONFIG["mail_smtpmode"] = "sendmail";
2055 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2056 \$CONFIG["mail_smtpport"] = 25;
2057 \$CONFIG["mail_smtptimeout"] = 10;
2058 \$CONFIG["mail_smtpsecure"] = "";
2059 \$CONFIG["mail_smtpauth"] = false;
2060 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2061 \$CONFIG["mail_smtpname"] = "";
2062 \$CONFIG["mail_smtppassword"] = "";
2063 \$CONFIG["mail_domain"] = "$domain";
2064
2065 # https://github.com/nextcloud/user_external#readme
2066 # plus mailinabox example
2067 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2068
2069
2070 # based on installer check
2071 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2072 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2073
2074 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2075 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2076 \$CONFIG['trusted_domains'] = array (
2077         0 => '$domain',
2078     );
2079 #\$CONFIG[''] = '';
2080 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2081 var_export(\$CONFIG);
2082 fwrite(STDOUT, ";\n");
2083 EOF
2084     m php tmp.php >config.php
2085     m rm tmp.php
2086     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2087     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2088     # user_external not compaible with nc 23
2089     for app in contacts calendar; do
2090       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2091         m sudo -u www-data php $ncdir/occ app:install $app
2092       fi
2093     done
2094     i /etc/systemd/system/$ncbase.service <<EOF
2095 [Unit]
2096 Description=ncup $ncbase
2097 After=multi-user.target
2098
2099 [Service]
2100 Type=oneshot
2101 ExecStart=/usr/local/bin/ncup $ncbase
2102 User=www-data
2103 IOSchedulingClass=idle
2104 CPUSchedulingPolicy=idle
2105 EOF
2106     i /etc/systemd/system/$ncbase.timer <<EOF
2107 [Unit]
2108 Description=ncup $ncbase timer
2109
2110 [Timer]
2111 OnCalendar=Daily
2112
2113 [Install]
2114 WantedBy=timers.target
2115 EOF
2116     systemctl enable --now $ncbase.timer
2117     i /usr/local/bin/ncup <<'EOFOUTER'
2118 #!/bin/bash
2119 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2120 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2121 set -eE -o pipefail
2122 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2123
2124 ncbase=$1
2125 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2126   echo failed nextcloud update for $ncbase >&2
2127   /sbin/exim -t <<EOF
2128 To: alerts@iankelling.org
2129 From: root@$(hostname -f)
2130 Subject: failed nextcloud update for $ncbase
2131
2132 For logs, run: jr -u $ncbase
2133 EOF
2134 fi
2135 EOFOUTER
2136
2137     mkdir -p /var/www/cron-errors
2138     chown www-data.www-data /var/www/cron-errors
2139     i /etc/cron.d/$ncbase <<EOF
2140 PATH=/sbin:/usr/sbin:/usr/bin:/bin:/usr/local/bin
2141 SHELL=/bin/bash
2142 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2143 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2144 EOF
2145
2146   done
2147 fi
2148
2149
2150 # * exim host conditional config
2151
2152 # ** exim certs
2153
2154 all_dirs=(/p/c/filesystem)
2155 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2156   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2157 done
2158 files=()
2159 for d in ${all_dirs[@]}; do
2160   f=$d/etc/exim4/passwd
2161   if [[ -e $f  ]]; then
2162     files+=($f)
2163   fi
2164   tmp=($d/etc/exim4/*.pem)
2165   if (( ${#tmp[@]} )); then
2166     files+=(${tmp[@]})
2167   fi
2168 done
2169
2170 if (( ${#files[@]} )); then
2171   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2172 fi
2173
2174
2175 # ** auth
2176
2177 case $HOSTNAME in
2178   bk|je)
2179     # avoid accepting mail for invalid users
2180     # https://wiki.dovecot.org/LMTP/Exim
2181     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2182 deny
2183   message = invalid recipient
2184   domains = +local_domains
2185   !verify = recipient/callout=no_cache
2186 EOF
2187     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2188 dovecot_plain:
2189   driver = dovecot
2190   public_name = PLAIN
2191   server_socket = /var/run/dovecot/auth-client
2192   server_set_id = $auth1
2193 EOF
2194     ;;
2195 esac
2196 if $bhost_t; then
2197   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2198 # from 30_exim4-config_examples
2199 plain_server:
2200 driver = plaintext
2201 public_name = PLAIN
2202 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2203 server_set_id = $auth2
2204 server_prompts = :
2205 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2206 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2207 .endif
2208 EOF
2209 fi
2210
2211 # ** main daemon use non-default config file
2212 case $HOSTNAME in
2213   bk|$MAIL_HOST)
2214     # to see the default comments in /etc/default/exim4:
2215     # s update-exim4defaults --force --init
2216     # which will overwrite any existing file
2217     i /etc/default/exim4 <<'EOF'
2218 QUEUERUNNER='combined'
2219 QUEUEINTERVAL='30m'
2220 COMMONOPTIONS='-C /etc/exim4/my.conf'
2221 UPEX4OPTS='-o /etc/exim4/my.conf'
2222 #E4BCD_PANICLOG_NOISE='malware acl condition: clamd /var/run/clamav/clamd\.ctl : unable to connect to UNIX socket'
2223 EOF
2224     i /etc/exim4/trusted_configs <<'EOF'
2225 /etc/exim4/my.conf
2226 EOF
2227     ;;
2228   *)
2229     # default file
2230     i /etc/default/exim4 <<'EOF'
2231 QUEUERUNNER='combined'
2232 QUEUEINTERVAL='30m'
2233 EOF
2234     ;;
2235 esac
2236
2237 case $HOSTNAME in
2238   # ** $MAIL_HOST|bk|je)
2239   $MAIL_HOST|bk|je)
2240
2241     echo|i /etc/exim4/conf.d/router/870_backup_local
2242
2243     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2244 # note: some things we don't set that are here by default because they are unused.
2245 dc_local_interfaces=''
2246 dc_eximconfig_configtype='internet'
2247 dc_localdelivery='dovecot_lmtp'
2248 EOF
2249     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2250 # recommended if dns is expected to work
2251 CHECK_RCPT_VERIFY_SENDER = true
2252 # default config comment says: If you enable this, you might reject legitimate mail,
2253 # but eggs has had this a long time, so that seems unlikely.
2254 CHECK_RCPT_SPF = true
2255 CHECK_RCPT_REVERSE_DNS = true
2256 CHECK_MAIL_HELO_ISSUED = true
2257
2258 # enable 587 in addition to the default 25, so that
2259 # i can send mail where port 25 is firewalled by isp
2260 daemon_smtp_ports = 25 : 587
2261 # default of 25, can get stuck when catching up on mail
2262 smtp_accept_max = 400
2263 smtp_accept_reserve = 100
2264 smtp_reserve_hosts = +iank_trusted
2265
2266 # options exim has to avoid having to alter the default config files
2267 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2268 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2269 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2270 # testing dmarc
2271 #dmarc_tld_file = /etc/public_suffix_list.dat
2272 EOF
2273     ;;&
2274
2275   # ** $MAIL_HOST|bk)
2276   $MAIL_HOST|bk)
2277
2278     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2279 # je.b8.nz will run out of memory with freshclam
2280 av_scanner = clamd:/var/run/clamav/clamd.ctl
2281 EOF
2282
2283     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2284 deny
2285   malware = */defer_ok
2286   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2287   message = This message was detected as possible malware ($malware_name).
2288 EOF
2289
2290     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2291 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2292 # smarthost config type, not sure.
2293 # failing message on mail-tester.com:
2294 # We check if there is a server (A Record) behind your hostname kd.
2295 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2296 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2297 # and this one seemed appropriate from grepping config.
2298 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2299 # mail to kd, so this should basically be a name that no host has as their
2300 # canonical hostname since the actual host sits behind a nat and changes.
2301 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2302 # I used this to avoid sender verification, didnt work but it still
2303 # makes sense based on the spec.
2304 hosts_treat_as_local = defaultnn.b8.nz
2305
2306 # Outside nn, we get the default cert location from a debian macro,
2307 # and the cert file is put in place by a certbot hook.
2308 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2309 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2310 EOF
2311
2312     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2313 gnusmarthost:
2314   debug_print = "R: smarthost for $local_part@$domain"
2315   driver = manualroute
2316   domains = ! +local_domains
2317 # send most mail through eggs, helps fsfs sender reputation.
2318 # uncomment and optionally move to 188 file to send through my own servers again
2319   senders = *@gnu.org
2320   transport = smarthost_dkim
2321   route_list = * fencepost.gnu.org::587 byname
2322   host_find_failed = ignore
2323   same_domain_copy_routing = yes
2324   no_more
2325 EOF
2326
2327     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2328 10.173.8.1 defaultnn.b8.nz
2329 EOF
2330     ;;&
2331   # ** $MAIL_HOST)
2332   $MAIL_HOST)
2333
2334     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2335 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2336 # use vpn transport. lower priority so it overrides the default route.
2337 # Use this in case our vpn fails, we dont send anything without it.
2338 .ifdef DCconfig_internet
2339 dnslookup_vpn:
2340   debug_print = "R: dnslookup for $local_part@$domain"
2341   driver = dnslookup
2342   domains = ! +local_domains
2343   transport = remote_smtp_vpn
2344   same_domain_copy_routing = yes
2345   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
2346   no_more
2347 .endif
2348 EOF
2349
2350
2351     # note on backups: I used to do an automatic sshfs and restricted
2352     # permissions to a specific directory on the remote server, /bu/mnt,
2353     # which required using a dedicated user, but realized smtp will be
2354     # more reliable and less fuss. If I ever need that again, see the
2355     # history of this file, and bum in brc2.
2356
2357     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2358 ### router/900_exim4-config_local_user
2359 #################################
2360
2361 # todo, it would be nice to save sent email too,
2362 # but its not so important, they still exist in my head
2363
2364 backup_redir:
2365 driver = redirect
2366 domains = +local_domains
2367 # b is just an arbirary short string
2368 data = b@eximbackup.b8.nz
2369 # note, to test this, i could temporarily allow testignore.
2370 # alerts avoids potential mail loop. root is already
2371 # redirected earlier, so that is just being overly cautious.
2372 local_parts = ! root : ! testignore : ! alerts
2373 unseen = true
2374
2375 backup_copy:
2376 driver = manualroute
2377 domains = eximbackup.b8.nz
2378 transport = backup_remote
2379 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2380 # note changes here also require change in passwd.client
2381 route_list = * eximbackup.b8.nz
2382 same_domain_copy_routing = yes
2383 errors_to = alerts@iankelling.org
2384 no_more
2385 EOF
2386
2387
2388     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2389 backup_remote:
2390   driver = smtp
2391   multi_domain
2392 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2393   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2394 .endif
2395   hosts_require_auth = *
2396   hosts_try_auth = *
2397   envelope_to_add
2398   # manual return path because we want it to be the envelope sender
2399   # we got not the one we are using in this smtp transport
2400   headers_add = "Return-path: $sender_address"
2401 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2402   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2403 .endif
2404 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2405   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2406 .endif
2407 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2408   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2409 .endif
2410 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2411   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2412 .endif
2413 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2414   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2415 .endif
2416 .ifdef REMOTE_SMTP_HELO_DATA
2417   helo_data=REMOTE_SMTP_HELO_DATA
2418 .endif
2419 .ifdef TLS_DH_MIN_BITS
2420 tls_dh_min_bits = TLS_DH_MIN_BITS
2421 .endif
2422 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2423 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2424 .endif
2425 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2426 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2427 .endif
2428 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2429   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2430 .endif
2431 EOF
2432
2433
2434     # this avoids some error. i cant remember what. todo:
2435     # test it out and document why/if its needed.
2436     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2437     # mail.fsf.org
2438     # *.posteo.de
2439     # EOF
2440
2441     # cron email from smarthost hosts will automatically be to
2442     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2443     # case that doesn't work, we still want to accept that mail, but not
2444     # from any host except the smarthosts. local_hostnames and this rule
2445     # is for that purpose.
2446     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2447 deny
2448   !authenticated = *
2449   domains = +local_hostnames
2450   message = no relay
2451 EOF
2452     echo|i /etc/exim4/conf.d/router/880_universal_forward
2453
2454     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2455     # and also have mail.iankelling.org whitelisted as a relay domain.
2456     # I could avoid that if I changed this to submit to 587 with a
2457     # password like a standard mua.
2458     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2459 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2460 # replaced DCsmarthost with hostname
2461 fsfsmarthost:
2462   debug_print = "R: smarthost for $local_part@$domain"
2463   driver = manualroute
2464   domains = ! +local_domains
2465   senders = *@fsf.org
2466   transport = remote_smtp_smarthost
2467   route_list = * mail.fsf.org::587 byname
2468   host_find_failed = ignore
2469   same_domain_copy_routing = yes
2470   no_more
2471
2472 posteosmarthost:
2473   debug_print = "R: smarthost for $local_part@$domain"
2474   driver = manualroute
2475   domains = ! +local_domains
2476   senders = *@posteo.net
2477   transport = remote_smtp_smarthost
2478   route_list = * posteo.de::587 byname
2479   host_find_failed = ignore
2480   same_domain_copy_routing = yes
2481   no_more
2482
2483 EOF
2484
2485     # Greping /etc/exim4, unqualified mails this would end up as
2486     # a return path, so it should go somewhere we will see.
2487     # The debconf output about mailname is as follows:
2488     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2489     # name.
2490     # This name will also be used by other programs. It should be the single, fully
2491     # qualified domain name (FQDN).
2492     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2493     # this option would be example.org.
2494     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2495     echo iankelling.org > /etc/mailname
2496
2497
2498     # mail.iankelling.org so local imap clients can connect with tls and
2499     # when they happen to not be local.
2500     # todo: this should be 10.8.0.4
2501
2502     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2503 # note: i put nn.b8.nz into bind for good measure
2504 10.173.8.2 nn.b8.nz mx.iankelling.org
2505 EOF
2506
2507     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2508     # weve configured this file in dnsmasq if we are using it.
2509     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2510 server=/mx.iankelling.org/127.0.1.1
2511 EOF
2512     # I used to use debconf-set-selections + dpkg-reconfigure,
2513     # which then updates this file
2514     # but the process is slower than updating it directly and then I want to set other things in
2515     # update-exim4.conf.conf, so there's no point.
2516     # The file is documented in man update-exim4.conf,
2517     # except the man page is not perfect, read the bash script to be sure about things.
2518
2519     # The debconf questions output is additional documentation that is not
2520     # easily accessible, but super long, along with the initial default comment in this
2521     # file, so I've saved that into ./mail-notes.conf.
2522     #
2523     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2524     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2525 # man page: is used to build the local_domains list, together with "localhost"
2526 # this is duplicated in a later router.
2527 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2528 EOF
2529
2530
2531     # dmarc. not used currently
2532     f=/etc/cron.daily/refresh-dmarc-tld-file
2533     cat >$f <<'EOF'
2534 #!/bin/bash
2535 cd /etc
2536 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2537 EOF
2538     m chmod 755 $f
2539
2540     ;;
2541   # ** bk
2542   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2543   bk)
2544
2545     echo|i /etc/exim4/conf.d/rcpt_local_acl
2546     echo|i /etc/exim4/conf.d/router/880_universal_forward
2547
2548     echo amnimal.ninja > /etc/mailname
2549
2550     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2551 10.173.8.2 nn.b8.nz
2552 EOF
2553
2554     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2555 s,/etc/default/exim4,/etc/default/exim4in,g
2556 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2557 s,(^[ #]*Provides:).*,\1 exim4in,
2558 s,(^[ #]*NAME=).*,\1"exim4in",
2559 EOF
2560     chmod +x /etc/init.d/exim4in
2561     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2562 [Unit]
2563 # needed to continually restart
2564 StartLimitIntervalSec=0
2565
2566 [Service]
2567 Restart=always
2568 # time to sleep before restarting a service
2569 RestartSec=20
2570 EOF
2571
2572     i /etc/default/exim4in <<'EOF'
2573 # defaults but no queue runner and alternate config dir
2574 QUEUERUNNER='no'
2575 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2576 UPEX4OPTS='-d /etc/myexim4'
2577 EOF
2578
2579     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2580 # man page: is used to build the local_domains list, together with "localhost"
2581 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com'
2582 EOF
2583
2584     ;;
2585   # ** je
2586   je)
2587     echo je.b8.nz > /etc/mailname
2588     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2589 dc_other_hostnames='je.b8.nz'
2590 EOF
2591     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2592     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2593     echo|i /etc/exim4/conf.d/rcpt_local_acl
2594     echo|i /etc/exim4/conf.d/router/880_universal_forward
2595     ;;
2596   # ** not MAIL_HOST|bk|je
2597   *)
2598     # this one should be removed for all non mail hosts, but
2599     # bk and je never become mail_host
2600     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2601
2602     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2603     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2604     echo|i /etc/exim4/conf.d/rcpt_local_acl
2605     echo|i /etc/exim4/conf.d/router/890_backup_copy
2606     echo|i /etc/exim4/conf.d/main/000_local-nn
2607
2608
2609     if $bhost_t; then
2610       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2611 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2612 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2613 # so we can maintiain the originals of the backups.
2614 # we wouldnt want this if we were dealing with any other
2615 # local deliveries, but we sent all others to the smarthost
2616 # which then strips the headers.
2617 envelope_to_remove = false
2618 return_path_remove = false
2619 EOF
2620     fi
2621
2622     # catches things like cronjob email
2623     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2624 universal_forward:
2625   driver = redirect
2626   domains = +local_domains
2627   data = alerts@iankelling.org
2628 EOF
2629
2630
2631     for unit in ${nn_progs[@]}; do
2632       f=/etc/systemd/system/$unit.service.d/nn.conf
2633       rm -fv $f
2634     done
2635
2636     # dont i dont care if defaultnn section gets left, it wont
2637     # get used.
2638     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2639     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2640
2641
2642     if $bhost_t; then
2643       install -d /bu
2644       install -d -g $u -o $u -m 771 /bu/md
2645       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2646 # modified debian maildir transport
2647 backup_maildir:
2648   driver = appendfile
2649   directory = /bu/md
2650   delivery_date_add
2651   # note, no return path or envelope added
2652   maildir_format
2653   directory_mode = 0700
2654   mode = 0644
2655   mode_fail_narrower = false
2656   user = $u
2657 EOF
2658
2659       i /etc/exim4/conf.d/router/870_backup_local <<EOF
2660 ### router/900_exim4-config_local_user
2661 #################################
2662
2663 backup_local:
2664   debug_print = "R: local_user for \$local_part@\$domain"
2665   driver = accept
2666   domains = eximbackup.b8.nz
2667   transport = backup_maildir
2668 EOF
2669
2670       # Bind to wghole to receive mailbackup.
2671       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2672       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2673 dc_other_hostnames='eximbackup.b8.nz'
2674 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2675 EOF
2676
2677       # wghole & thus exim will fail to start without internet connectivity.
2678       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2679 [Unit]
2680 StartLimitIntervalSec=0
2681
2682 [Service]
2683 Restart=always
2684 RestartSec=20
2685 EOF
2686
2687     else
2688       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2689 # Note: If theres like a temporary problem where mail gets sent to
2690 # one of these hosts, if exim isnt listening, it will be a temporary error
2691 # instead of a permanent 5xx.
2692 dc_local_interfaces='127.0.0.1;::1'
2693 EOF
2694       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2695     fi
2696     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2697 dc_eximconfig_configtype='smarthost'
2698 dc_smarthost='$smarthost'
2699 EOF
2700
2701     hostname -f |i /etc/mailname
2702     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2703 # The manpage incorrectly states this will do header rewriting, but
2704 # that only happens if we have dc_hide_mailname is set.
2705 dc_readhost='iankelling.org'
2706 # Only used in case of bounces.
2707 dc_localdelivery='maildir_home'
2708 EOF
2709     ;;
2710 esac
2711
2712
2713
2714
2715 # ** $MAILHOST|bk, things that belong at the end
2716 case $HOSTNAME in
2717   $MAIL_HOST|bk)
2718     # config for the non-nn exim
2719     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2720     # If we ever wanted to have a separate spool,
2721     # we could do it like this.
2722     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
2723     # spool_directory = /var/spool/myexim4
2724     # EOF
2725     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
2726 dc_eximconfig_configtype='smarthost'
2727 dc_smarthost='nn.b8.nz'
2728 EOF
2729     ;;&
2730   bk)
2731
2732     # config for the non-nn exim
2733     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2734 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
2735 EOF
2736     ;;
2737   $MAIL_HOST)
2738     # for bk, we have a exim4in.service that will do this for us.
2739     m update-exim4.conf -d /etc/myexim4
2740     ;;
2741 esac
2742
2743 # * spool dir setup
2744
2745 # ** bind mount setup
2746 # put spool dir in directory that spans multiple distros.
2747 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
2748 #
2749 dir=/nocow/exim4
2750 sdir=/var/spool/exim4
2751 # we only do this if our system has $dir
2752
2753 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
2754 # about 2 seconds later, exim starts, and immediately puts into paniclog:
2755 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
2756 # so, im trying a bind mount to get rid of that.
2757 if [[ -e /nocow ]]; then
2758   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
2759     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
2760   fi
2761   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
2762 [Unit]
2763 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
2764 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
2765 After=local-fs.target
2766 EOF
2767   if ! mountpoint -q $sdir; then
2768     stopifactive exim4 exim4in
2769     if [[ -L $sdir ]]; then
2770       m rm $sdir
2771     fi
2772     if [[ ! -e $dir && -d $sdir ]]; then
2773       m mv $sdir $dir
2774     fi
2775     if [[ ! -d $sdir ]]; then
2776       m mkdir $sdir
2777       m chmod 000 $sdir # only want it to be used when its mounted
2778     fi
2779     m mount $sdir
2780   fi
2781 fi
2782
2783
2784
2785 # ** exim/spool uid setup
2786 # i have the spool directory be common to distro multi-boot, so
2787 # we need the uid to be the same. 608 cuz it's kind of in the middle
2788 # of the free system uids.
2789 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
2790 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
2791 if [[ ! $uid ]]; then
2792   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
2793   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
2794     --no-create-home --disabled-login --force-badname Debian-exim
2795 elif [[ $uid != 608 ]]; then
2796   stopifactive exim4 exim4in
2797   m usermod -u 608 Debian-exim
2798   m groupmod -g 608 Debian-exim
2799   m usermod -g 608 Debian-exim
2800   m find / /nocow -path ./var/tmp -prune -o -xdev -uid $uid -execdir chown -h 608 {} +
2801   m find / /nocow -path ./var/tmp -prune -o -xdev -gid $gid -execdir chgrp -h 608 {} +
2802 fi
2803
2804 # * start / stop services
2805
2806 reifactive dnsmasq nscd
2807
2808 if $reload; then
2809   m systemctl daemon-reload
2810 fi
2811
2812 m systemctl --now enable epanicclean.timer
2813
2814 case $HOSTNAME in
2815   je)
2816     /a/exe/web-conf apache2 je.b8.nz
2817     ;;
2818   bk)
2819     /a/exe/web-conf apache2 mail2.iankelling.org
2820     ;;
2821 esac
2822
2823 m /a/bin/ds/mail-cert-cron -1
2824 sre mailcert.timer
2825
2826 case $HOSTNAME in
2827   bk)
2828     # todo, this should be done in distro-begin
2829     soff systemd-resolved
2830     ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf
2831     ;;&
2832   $MAIL_HOST|bk)
2833     m systemctl --now enable mailnn mailnnroute
2834     ;;&
2835   $MAIL_HOST)
2836     # we use dns to start wg
2837     if $reload; then
2838       sre unbound
2839     else
2840       m systemctl --now enable unbound
2841     fi
2842     ;;&
2843   $MAIL_HOST|bk)
2844     # If these have changes, id rather manually restart it, id rather
2845     # not restart and cause temporary errors
2846     if $reload; then
2847       sre $vpnser
2848     else
2849       m systemctl --now enable $vpnser
2850     fi
2851     if ! systemctl is-active clamav-daemon >/dev/null; then
2852       m systemctl --now enable clamav-daemon
2853       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.{timer,service} /etc/systemd/system)
2854       if [[ $out ]]; then
2855         reload=true
2856       fi
2857
2858       # note, this will cause paniclog entries because it takes like 45
2859       # seconds for clamav to start, i use ./epanic-clean to remove
2860       # them.
2861     fi
2862     ;;&
2863   $MAIL_HOST|bk|je)
2864     # start spamassassin/dovecot before exim.
2865     sre dovecot spamassassin
2866     # need to wait a bit before restarting exim, else I
2867     # get a paniclog entry like: spam acl condition: all spamd servers failed
2868     sleep 3
2869     m systemctl --now enable mailclean.timer
2870     ;;&
2871   $MAIL_HOST)
2872     # < 2.1 (eg: in t9), uses a different data format which required manual
2873     # migration. dont start if we are running an old version.
2874     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
2875       m systemctl --now enable radicale
2876     fi
2877     ;;&
2878 esac
2879
2880 # last use of $reload happens in previous block
2881 rm -f /var/local/mail-setup-reload
2882
2883
2884 case $HOSTNAME in
2885   $MAIL_HOST|bk|je) : ;;
2886   *)
2887     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
2888     ;;
2889 esac
2890
2891 sre exim4
2892
2893 case $HOSTNAME in
2894   $MAIL_HOST)
2895     m systemctl --now enable mailbindwatchdog
2896     ;;
2897   *)
2898     soff mailbindwatchdog
2899     ;;
2900 esac
2901
2902
2903 case $HOSTNAME in
2904   bk) sre exim4in ;;
2905 esac
2906
2907 # * mail monitoring / testing
2908
2909 # note, to test clamav, send an email with body that only contains
2910 # https://en.wikipedia.org/wiki/EICAR_test_file
2911 # which set malware_name to Eicar-Signature
2912 case $HOSTNAME in
2913   $MAIL_HOST|bk|je)
2914     # note: cronjob "ian" also does some important monitoring
2915     # todo: this will sometimes cause an alert because mailtest-check will run
2916     # before we have setup network namespace and spamassassin
2917     cat >/etc/cron.d/mailtest <<EOF
2918 SHELL=/bin/bash
2919 PATH=/usr/bin:/bin:/usr/local/bin
2920 MAILTO=alerts@iankelling.org
2921 */5 * * * *   $u send-test-forward |& log-once send-test-forward
2922 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
2923 # im seeing some intermittent failures on the slow check, do it all the time
2924 # for now. It looks like a dns failure.
2925 #5-59/5 * * * *   root mailtest-check |& log-once -1 mailtest-check
2926 #0 * * * *   root mailtest-check slow |& log-once -1 mailtest-slow
2927 */5 * * * *   root timeout 290 mailtest-check slow |& log-once -12 mailtest-check
2928 EOF
2929     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
2930       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
2931     ;;&
2932   $MAIL_HOST)
2933     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
2934     test_to="testignore@expertpathologyreview.com, testignore@je.b8.nz, testignore@amnimal.ninja, jtuttle@gnu.org"
2935
2936     cat >>/etc/cron.d/mailtest <<EOF
2937 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
2938 EOF
2939     ;;&
2940   bk)
2941     test_froms=(testignore@expertpathologyreview.com testignore@amnimal.ninja)
2942     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@je.b8.nz"
2943     ;;&
2944   je)
2945     test_froms=(testignore@je.b8.nz)
2946     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@expertpathologyreview.com, testignore@amnimal.ninja"
2947     ;;&
2948   $MAIL_HOST|bk|je)
2949     cat >/usr/local/bin/send-test-forward <<'EOF'
2950 #!/bin/bash
2951 olds=(
2952 $(/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
2953 )
2954 if (( ${#olds[@]} )); then
2955   /sbin/exim -Mrm "${olds[@]}" >/dev/null
2956 fi
2957 EOF
2958     for test_from in ${test_froms[@]}; do
2959       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
2960 /usr/sbin/exim -f $test_from -t <<EOF
2961 From: $test_from
2962 To: $test_to
2963 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$(date +%s)
2964
2965 /usr/local/bin/send-test-forward
2966 EOF
2967 EOFOUTER
2968     done
2969     m chmod +x /usr/local/bin/send-test-forward
2970     ;;
2971   *)
2972     rm -fv /etc/cron.d/mailtest
2973     ;;
2974 esac
2975
2976
2977
2978 # * misc
2979 m sudo -u $u mkdir -p /home/$u/.cache
2980 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
2981 while (($#)); do
2982   target=$1
2983   f=$2
2984   shift 2
2985   if [[ ! -L $f ]]; then
2986     if [[ -e $f ]]; then
2987       rm -rf $f
2988     fi
2989     m sudo -u $u ln -sf -T $target $f
2990   fi
2991 done
2992
2993
2994 # /etc/alias setup is debian specific, and exim postinst script sets up
2995 # an /etc/alias from root to the postmaster, based on the question
2996 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
2997 # root, or there was no preexisting aliases file. postfix won\'t set up
2998 # a root to $postmaster alias if it\'s already installed. Easiest to
2999 # just set it ourselves.
3000
3001 # debconf question for postmaster:
3002 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3003 # to the user account of the actual system administrator.
3004 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3005 # recommended.
3006 # Note that postmaster\'s mail should be read on the system to which it is directed,
3007 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3008 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3009 # force local delivery.
3010 # Multiple user names need to be separated by spaces.
3011 # Root and postmaster mail recipient:
3012
3013 m exit 0
3014 :
3015
3016 # Local Variables:
3017 # eval: (outline-minor-mode)
3018 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3019 # End:
3020 # this is combined with defining outline-level in init.el