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 #  restrict its filesystem access from within systemd
   8
   9 #  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.
  10 #  todo: consider hardening cups listening on 0.0.0.0
  11 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  12 #  todo: check that spamd and unbound only listen locally.
  13
  14 # todo:  hosts should only allow external mail that is authed and
  15 # destined for backup route. it is a minor issue since traffic is
  16 # limited to the wghole network.
  17
  18 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  19 # instead of a simple rejection like it should.
  20
  21 # todo: run mailping test after running, or otherwise
  22 # clear out terminal alert
  23
  24 # todo: reinstall bk with bigger filesystem
  25
  26 # todo: on bk, dont send email if mailvpn is not up
  27
  28 # todo: mailtest-check should check on bk too
  29
  30 # todo: disable postgrey
  31
  32 # todo: in testforward-check, we should also look
  33
  34 # todo: test that bounces dont help create valid mailtest-check
  35
  36 # todo: move mail stuff in distro-end into this file
  37
  38 # todo: consider rotating dkim & publishing key so every past email I sent
  39 # isnt necessarily signed
  40
  41 # todo: consider how to get clamav out of Debian-exim group
  42 # so it cant read/write the whole mail spool, for better
  43 # security.
  44
  45 # todo: create a cronjob to update or warn on expiring dnssec keys
  46
  47 # todo: we should test failed mail daily or so
  48 # failed cronjob, failed sysd-log-once,
  49 # a local bounce from a cronjob, a local bounce
  50 # to a bad remote address, perhaps a local failure
  51 # when the sending daemon is down.
  52 # And send an alert email if no alerts have been sent
  53 # in 2 or 3 days or something. todo, test cron mail on li.
  54
  55 # todo: look at mailinabox extra dns records, note these changelogs:
  56 # - 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.
  57 # - 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.
  58 #
  59
  60 # todo: mailtest-check failure on remote hosts is not going to alert me.
  61 # sort that out.
  62 # todo: test mail failure as well as success.
  63 #
  64 # todo: validate that mailtest-check is doing dnsbl checks.
  65
  66 # background: I want to run exim in a network namespace so it can send
  67 # and receive through a vpn. This is needed so it can do ipv6, because
  68 # outside the namespace if we dont have ipv6, to send ipv6 through the
  69 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  70 # long time, it was fine, but it causes various pains, like increased
  71 # latency, increased recaptcha because my ip is from a data center, just
  72 # various issues I dont want on all the time. The problem with the
  73 # namespace is that all kinds of programs want to invoke exim, but they
  74 # wont be in the namespace. I could replace exim with a wrapper that
  75 # jumps into the namespace, i tried that, it works fine.  One remaining
  76 # problem was that I would have needed to hook into exim upgrades to
  77 # move exim and replace it with my wrapper script. Also, my script to
  78 # join the namespace is not super reliable because it uses a pgrep.
  79 # Instead, I should have created a systemd service for a process that
  80 # will never die and just writes its pid somewhere convenient.
  81 # That implementation
  82 # is below here:
  83 #
  84 # sudoers:
  85 # user ALL=(ALL) /usr/sbin/exim4
  86 #
  87 # move exim4 to eximian, use this script for exim4:
  88 #
  89 # #!/bin/bash
  90 # if ip a show veth1-mail &>/dev/null; then
  91 #   /usr/sbin/eximian "$@"
  92 #   exit
  93 # fi
  94 # dosudo=false
  95 # if [[ $USER && $USER != root ]]; then
  96 #   dosudo=true
  97 # fi
  98 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
  99 # if $dosudo; then
 100 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 101 # else
 102 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 103 # fi
 104 # ## end script
 105 #
 106 # an alternate solution: there is a small setguid program for
 107 # network namespaces in my bookmarks.
 108 #
 109 # However, the solution I went with is: have 2 exim
 110 # configs. A nonstandard location for the daemon that runs
 111 # in the namespace. For all other invocations, it uses
 112 # the default config location, which is altered to be
 113 # in a smarthost config which sends mail to the deaemon.
 114 #
 115 # I have a bash function, enn to invoke exim like the daemon is running.
 116 # and mailbash to just enter its network namespace.
 117
 118 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 119
 120 shopt -s nullglob
 121
 122 if [[ -s /usr/local/lib/err ]]; then
 123   source /usr/local/lib/err
 124 elif [[ -s /a/bin/errhandle/err ]]; then
 125   source /a/bin/errhandle/err
 126 else
 127   err "no err tracing script found"
 128 fi
 129 source /a/bin/distro-functions/src/identify-distros
 130 source /a/bin/distro-functions/src/package-manager-abstractions
 131
 132 # has nextcloud_admin_pass in it
 133 f=/p/c/machine_specific/$HOSTNAME/mail
 134 if [[ -e $f ]]; then
 135   # shellcheck source=/p/c/machine_specific/bk/mail
 136   source $f
 137 fi
 138
 139
 140 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 141
 142
 143 u=$(id -nu 1000)
 144
 145
 146 usage() {
 147   cat <<EOF
 148 Usage: ${0##*/} anything_here_to_debug
 149 Setup exim4 & dovecot & related things
 150
 151 -h|--help  Print help and exit.
 152 EOF
 153   exit $1
 154 }
 155
 156 # debug output if we pass any arg
 157 if (( $# )); then
 158   set -x
 159 fi
 160
 161
 162 ####### instructions for icedove #####
 163 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 164 # then click advanced so it accepts it.
 165 # we could also just use 127.0.0.1 with no ssl
 166 #
 167 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 168 # background: dovecot does not yet have ocsp stapling support
 169 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 170 #
 171 # for phone, k9mail, same thing but username alerts, pass in ivy-pass.
 172 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 173 # fetching mail settings: folder poll frequency 10 minutes
 174 #######
 175
 176
 177 # * perstent password instructions
 178 # Note: for cert cron, we need to manually run first to accept known_hosts
 179
 180 # # exim passwords:
 181 # # for hosts which have all private files I just use the same user
 182 # # for other hosts, each one get\'s their own password.
 183 # # for generating secure pass, and storing for server too:
 184 # f=$(mktemp)
 185 # host=tp
 186 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 187 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 188 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 189 # #reference: exim4_passwd_client(5)
 190 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 191 # mkdir -p $dir
 192 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 193 # # then run this script
 194
 195 # # dovecot password, i just need 1 as I\'m the only user
 196 # mkdir /p/c/filesystem/etc/dovecot
 197 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 198
 199 ####### end perstent password instructions ######
 200
 201
 202 # * dkim dns
 203 # # Remove 1 level of comments in this section, set the domain var
 204 # # for the domain you are setting up, then run this and copy dns settings
 205 # # into dns.
 206 # domain=iankelling.org
 207 # c /p/c/filesystem/etc/exim4
 208 # # this has several bugs addressed in comments, but it was helpful
 209 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 210
 211 # openssl genrsa -out $domain-private.pem 2048
 212 # # Then, to get the public key strings to put in bind:
 213
 214 # # selector is needed for having multiple keys for one domain.
 215 # # I dun do that, so just use a static one: li
 216 # # Debadmin page does not have v=, fastmail does, and this
 217 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 218 # # https://www.ietf.org/rfc/rfc6376.txt
 219 # # Join and print all but first and last line.
 220 # # last line: swap hold & pattern, remove newlines, print.
 221 # # lines 2+: append to hold space
 222 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 223 # cat <<EOF
 224 # a._domainkey.$domain  TXT     (
 225 # "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')" )
 226 # EOF
 227 # # sed explanation: skip the first few lines, then put them into the hold space, then
 228 # # on the last line, back to the patern space, remove the newlines, then add a newline
 229 # # at the last char - 240, because bind txt records need strings <=255 chars,
 230 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 231 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 232
 233 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 234
 235 # * dmarc dns
 236
 237 # # 2017-02 dmarc policies:
 238 # # host -t txt _dmarc.gmail.com
 239 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 240 # # there were articles claiming gmail would be  changing
 241 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 242 # # expected to cause problems
 243 # # with a few old mailing lists, copying theirs for now.
 244 #
 245 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 246
 247 # * other dns
 248
 249 # # 2017-02 spf policies:
 250 # # host -t txt lists.fedoraproject.org
 251 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 252 # # i include fastmail\'s settings, per their instructions,
 253 # # and follow their policy. In mail in a box, or similar instructions,
 254 # # I\'ve seen recommended to not use a restrictive policy.
 255
 256 # # to check if dns has updated, you do
 257 # host -a mesmtp._domainkey.$domain
 258
 259 # # mx records,
 260 # # setting it to iankelling.org would work the same, but this
 261 # # is more flexible, I could change where mail.iankelling.org pointed.
 262 # cat <<'EOF'
 263 # mx records, 2 records each, for * and empty domain
 264 # pri 10 mail.iankelling.org
 265 # EOF
 266
 267 # # dnssec
 268 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 269
 270 # * functions & constants
 271
 272 pre="${0##*/}:"
 273 m() { printf "$pre %s\n"  "$*"; "$@"; }
 274 e() { printf "$pre %s\n"  "$*"; }
 275 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 276
 277 reload=false
 278 # This file is so if we fail in the middle and rerun, we dont lose state
 279 if [[ -e /var/local/mail-setup-reload ]]; then
 280   reload=true
 281 fi
 282 i() { # install file
 283   local tmp tmpdir dest="$1"
 284   local base="${dest##*/}"
 285   mkdir -p ${dest%/*}
 286   ir=false # i result
 287   tmpdir=$(mktemp -d)
 288   cat >$tmpdir/"$base"
 289   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 290   if [[ $tmp ]]; then
 291     printf "%s\n" "$tmp"
 292     ir=true
 293     if [[ $dest == /etc/systemd/system/* ]]; then
 294       touch /var/local/mail-setup-reload
 295       reload=true
 296     fi
 297   fi
 298   rm -rf $tmpdir
 299 }
 300 setini() {
 301   key="$1" value="$2" section="$3"
 302   file="/etc/radicale/config"
 303   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 304 }
 305 soff () {
 306   for service; do
 307     # ignore services that dont exist
 308     if systemctl cat $service &>/dev/null; then
 309       m systemctl disable --now $service
 310     fi
 311   done
 312 }
 313 sre() {
 314   for service; do
 315     m systemctl restart $service
 316     m systemctl enable $service;
 317   done
 318 }
 319 mailhost() {
 320   [[ $HOSTNAME == "$MAIL_HOST" ]]
 321 }
 322 e() { printf "%s\n" "$*"; }
 323 reifactive() {
 324   for service; do
 325     if systemctl is-active $service >/dev/null; then
 326       m systemctl restart $service
 327     fi
 328   done
 329 }
 330 stopifactive() {
 331   for service; do
 332     if systemctl is-active $service >/dev/null; then
 333       m systemctl stop $service
 334     fi
 335   done
 336 }
 337
 338 mxhost=mx.iankelling.org
 339 mxport=587
 340 forward=$u@$mxhost
 341
 342 # old setup. left as comment for example
 343 # mxhost=mail.messagingengine.com
 344 # mxport=587
 345 # forward=ian@iankelling.org
 346
 347 smarthost="$mxhost::$mxport"
 348 uhome=$(eval echo ~$u)
 349
 350 # Somehow on one machine, a file got written with 664 perms.
 351 # just being defensive here.
 352 umask 0022
 353
 354 source /a/bin/bash_unpublished/source-state
 355 if [[ ! $MAIL_HOST ]]; then
 356   err "\$MAIL_HOST not set"
 357 fi
 358
 359 bhost_t=false
 360 case $HOSTNAME in
 361   $MAIL_HOST) : ;;
 362   kd|frodo|x2|x3|kw|sy|bo)
 363     bhost_t=true
 364     ;;
 365 esac
 366
 367
 368 # * Install universal packages
 369
 370
 371 # installs epanicclean iptables-exim ip6tables-exim
 372 /a/bin/ds/install-my-scripts
 373
 374 if [[ $(debian-codename-compat) == bionic ]]; then
 375   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 376 Package: spamassassin sa-compile spamc
 377 Pin: release n=focal,o=Ubuntu
 378 Pin-Priority: 500
 379 EOF
 380 fi
 381
 382 # light version of exim does not have sasl auth support.
 383 pi-nostart exim4 exim4-daemon-heavy spamassassin openvpn unbound clamav-daemon wireguard
 384
 385 # note: pyzor debian readme says you need to run some initialization command
 386 # but its outdated.
 387 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 388 # bad packages that sometimes get automatically installed
 389 pu openresolv resolvconf
 390
 391 soff openvpn
 392
 393
 394 if [[ $(debian-codename) == etiona ]]; then
 395   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 396   # so running iptables as part of openvpn startup wont work. This should do it.
 397   pi iptables-persistent
 398   cat >/etc/iptables/rules.v6 <<'EOF'
 399 *mangle
 400 COMMIT
 401 *nat
 402 COMMIT
 403 EOF
 404   # load it now.
 405   m ip6tables -S >/dev/null
 406 fi
 407
 408 # our nostart pi fails to avoid enabling
 409
 410
 411 # * Mail clean cronjob
 412
 413 i /etc/systemd/system/mailclean.timer <<'EOF'
 414 [Unit]
 415 Description=Run mailclean daily
 416
 417 [Timer]
 418 OnCalendar=monthly
 419
 420 [Install]
 421 WantedBy=timers.target
 422 EOF
 423
 424 i /etc/systemd/system/mailclean.service <<EOF
 425 [Unit]
 426 Description=Delete and archive old mail files
 427 After=multi-user.target
 428
 429 [Service]
 430 User=$u
 431 Type=oneshot
 432 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 433 EOF
 434
 435 # * postgrey
 436
 437
 438 i /etc/default/postgrey <<'EOF'
 439 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 440 EOF
 441
 442 # * clamav
 443
 444 m usermod -a -G Debian-exim clamav
 445
 446 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 447 [Service]
 448 ExecStartPre=-/bin/mkdir /var/run/clamav
 449 ExecStartPre=/bin/chown clamav /var/run/clamav
 450 EOF
 451
 452 # * mail vpn config
 453
 454 # old.
 455 #vpnser=mailvpn.service
 456 # todo: this hangs if it cant resolv the endpoint. we
 457 # want it to just retry in the background.
 458 vpnser=wg-quick@wgmail.service
 459
 460 case $HOSTNAME in
 461   $MAIL_HOST)
 462     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 463     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 464     ;;&
 465   bk)
 466     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 467     ;;&
 468   *)
 469     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 470     if [[ -d $d ]]; then
 471       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 472     fi
 473     ;;
 474 esac
 475
 476 case $HOSTNAME in
 477   li) : ;;
 478   *)
 479     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 480 [Unit]
 481 Requires=mailnn.service
 482 After=network.target mailnn.service
 483 JoinsNamespaceOf=mailnn.service
 484 BindsTo=mailnn.service
 485 StartLimitIntervalSec=0
 486
 487 [Service]
 488 PrivateNetwork=true
 489 # i dont think we need any of these, but it doesnt hurt to stay consistent
 490 BindPaths=$bindpaths
 491
 492 Restart=on-failure
 493 RestartSec=20
 494 EOF
 495     ;;
 496 esac
 497
 498
 499 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 500 i /etc/systemd/system/mailvpn.service <<EOF
 501 [Unit]
 502 Description=OpenVPN tunnel for mail
 503 After=syslog.target network-online.target mailnn.service
 504 Wants=network-online.target
 505 Documentation=man:openvpn(8)
 506 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 507 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 508 # needed to continually restatr
 509 JoinsNamespaceOf=mailnn.service
 510 BindsTo=mailnn.service
 511 StartLimitIntervalSec=0
 512
 513 [Service]
 514 Type=notify
 515 RuntimeDirectory=openvpn-client
 516 RuntimeDirectoryMode=0710
 517 WorkingDirectory=/etc/openvpn/client
 518 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 519 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 520 LimitNPROC=10
 521 # DeviceAllow=/dev/null rw
 522 # DeviceAllow=/dev/net/tun rw
 523 PrivateNetwork=true
 524 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 525 # because of
 526 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 527 # there is a workaround there, but i dont think its really worth it,
 528 # the mail server is fine with a static dns anyways.
 529 # This thread is also interesting,
 530 # https://github.com/slingamn/namespaced-openvpn/issues/7
 531 # todo: the iptables rule at the bottom could be useful to prevent
 532 # dns from leaking in my network namespaced vpn.
 533 # I also like the idea of patching systemd-resolved so it
 534 # will listen on other interfaces, but its not worth my time.
 535 BindPaths=$bindpaths
 536 Restart=always
 537 # time to sleep before restarting a service
 538 RestartSec=20
 539
 540 [Install]
 541 WantedBy=multi-user.target
 542 EOF
 543
 544 i /etc/systemd/system/mailnnroute.service <<'EOF'
 545 [Unit]
 546 Description=Network routing for mailnn
 547 After=syslog.target network-online.target mailnn.service
 548 Wants=network-online.target
 549 JoinsNamespaceOf=mailnn.service
 550 BindsTo=mailnn.service
 551 StartLimitIntervalSec=0
 552
 553 [Service]
 554 Type=simple
 555 RemainAfterExit=true
 556 PrivateNetwork=true
 557 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 558 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 559 Restart=always
 560 RestartSec=20
 561
 562
 563 [Install]
 564 WantedBy=multi-user.target
 565 EOF
 566
 567 #
 568 i /etc/systemd/system/mailnn.service <<'EOF'
 569 [Unit]
 570 Description=Network Namespace for mail vpn service that will live forever and cant fail
 571 After=syslog.target network-online.target
 572 Wants=network-online.target
 573
 574 [Service]
 575 Type=simple
 576 PrivateNetwork=true
 577 ExecStart=/bin/sleep infinity
 578
 579 [Install]
 580 WantedBy=multi-user.target
 581 EOF
 582
 583 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 584 [Unit]
 585 Description=Watchdog to restart services relying on systemd-resolved dir
 586 After=syslog.target network-online.target
 587 Wants=network-online.target
 588 BindsTo=mailnn.service
 589
 590 [Service]
 591 Type=simple
 592 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 593 Restart=always
 594 # time to sleep before restarting a service
 595 RestartSec=10
 596
 597 [Install]
 598 WantedBy=multi-user.target
 599 EOF
 600
 601
 602
 603 # old service name
 604 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 605
 606 # We use a local unbound because systemd-resolved wont accept our
 607 # request, it will only listen to 127.0.0.53 in the main network
 608 # namespace, and rejected feature requests to change that (although I
 609 # could change the code and recompile), but anyways, that could answer
 610 # with things specific to the lan that aren't applicable in this
 611 # namespace, and since unbound is a recursive resolver, it means we just
 612 # use our own ip against dnsbl rate limits.
 613 #
 614 # If we ever notice this change, chattr +i on it
 615 # trust-ad is used in t10+, glibc 2.31
 616
 617 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 618 nameserver 127.0.0.1
 619 options edns0 trust-ad
 620 EOF
 621
 622 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 623 nameserver 127.0.0.53
 624 options edns0 trust-ad
 625 EOF
 626
 627
 628 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 629 nameserver 10.173.8.1
 630 options edns0 trust-ad
 631 EOF
 632
 633 # this is just a bug fix for trisquel.
 634 f=/etc/apparmor.d/usr.sbin.unbound
 635 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 636 if ! grep -qFx "$line" $f; then
 637   badline="/usr/sbin/unbound {"
 638   if ! grep -qFx "$badline" $f; then
 639     err expected line in $f not found
 640   fi
 641   sed -i "s,^$badline$,$line," $f
 642   if systemctl is-active apparmor &>/dev/null; then
 643     m systemctl reload apparmor
 644   fi
 645 fi
 646
 647 # note: anything added to nn_progs needs corresponding rm
 648 # down below in the host switch
 649 nn_progs=(exim4)
 650 if mailhost; then
 651   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 652   # Its in the nn so remote clients can connect to it.
 653   nn_progs+=(spamassassin dovecot)
 654 fi
 655
 656 case $HOSTNAME in
 657   $MAIL_HOST)
 658     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 659 [Unit]
 660 After=mailnn.service
 661 JoinsNamespaceOf=mailnn.service
 662 BindsTo=mailnn.service
 663 StartLimitIntervalSec=0
 664
 665 [Service]
 666 PrivateNetwork=true
 667 # note the nsswitch bind is actually not needed for bk, but
 668 # its the same file so it does no harm.
 669 BindPaths=$bindpaths
 670
 671 Restart=always
 672 RestartSec=20
 673 EOF
 674
 675     # sooo, there are a few ways to get traffic from the mail network
 676     # namespace to go over the wghole.
 677     #
 678     #1: unify the mail vpn and wghole
 679     # into 1 network.  this seems simple and logical, so I'm doing it.
 680     # One general downside is tying things together, if I need to mess
 681     # with one thing, it breaks the other. Oh well for now.
 682     #
 683     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 684     #
 685     # 3. We can setup the routing to happen on li, which seemed like I
 686     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 687     # wghole clients, but I think that is kind of hacky and breaks ipv4
 688     # routing within the mailvpn, it happened to work just because exim
 689     # prefers ipv6 and that was also available in the mailvpn.
 690     #
 691     # 4. Put the hole interface into the mail network namespace. This
 692     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 693     # vpn routing and establishes a direct connection.  I only use the
 694     # hole vpn for randomish things, it should be fine to join the mail
 695     # nn for that. There should be some way to fix the routing issue
 696     # by doing manual routing, but that doesn't seem like a good use of time.
 697     # relevant:
 698     # https://www.wireguard.com/netns/#
 699     #
 700     # for wireguard debugging
 701     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 702     # dmesg -w
 703
 704     ;;&
 705   $MAIL_HOST|bk)
 706     for unit in ${nn_progs[@]}; do
 707       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 708 [Unit]
 709 # commented for old openvpn
 710 Requires=$vpnser
 711 After=network.target mailnn.service $vpnser
 712 JoinsNamespaceOf=mailnn.service
 713 BindsTo=mailnn.service
 714 StartLimitIntervalSec=0
 715
 716 [Service]
 717 PrivateNetwork=true
 718 # note the nsswitch bind is actually not needed for bk, but
 719 # its the same file so it does no harm.
 720 BindPaths=$bindpaths
 721
 722 Restart=always
 723 RestartSec=20
 724 EOF
 725     done
 726     ;;
 727   *)
 728     for unit in exim4 spamassassin dovecot unbound; do
 729       f=/etc/systemd/system/$unit.service.d/nn.conf
 730       if [[ -s $f ]]; then
 731         rm -fv $f
 732         reload=true
 733       fi
 734     done
 735     ;;
 736 esac
 737
 738 # * spamassassin config
 739 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 740 # see exim spec
 741 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 742 EOF
 743 if $ir; then
 744   m sysctl -p
 745 fi
 746
 747 i /etc/spamassassin/mylocal.cf <<'EOF'
 748 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 749
 750 # /usr/share/doc/exim4-base/README.Debian.gz:
 751 #   SpamAssassin's default report should not be used in a add_header
 752 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 753 #   warning "BAD HEADER SECTION, Improper folded header field made up
 754 #   entirely of whitespace".) This is a safe, terse alternative:
 755 clear_report_template
 756 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 757 uridnsbl_skip_domain iankelling.org
 758 uridnsbl_skip_domain amnimal.ninja
 759 uridnsbl_skip_domain expertpathologyreview.com
 760 uridnsbl_skip_domain zroe.org
 761 EOF
 762
 763 # 2020-10-19 remove old file. remove this when all hosts updated
 764 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 765
 766 i /etc/default/spamassassin <<'EOF'
 767 # defaults plus debugging flags for an issue im having
 768 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 769 PIDFILE="/var/run/spamd.pid"
 770 # my additions
 771 NICE="--nicelevel 15"
 772 CRON=1
 773 EOF
 774 #####   end spamassassin config
 775
 776
 777 # * Update mail cert
 778 if [[ -e /p/c/filesystem ]]; then
 779   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 780   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 781   # after my internet was down for a bit:
 782   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 783   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 784 fi
 785 case $HOSTNAME in
 786   bk)
 787     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 788       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 789       exit 1
 790     fi
 791     ;;
 792 esac
 793
 794 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 795
 796 i /etc/systemd/system/mailcert.service <<'EOF'
 797 [Unit]
 798 Description=Mail cert rsync
 799 After=multi-user.target
 800
 801 [Service]
 802 Type=oneshot
 803 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 804 EOF
 805 i /etc/systemd/system/mailcert.timer <<'EOF'
 806 [Unit]
 807 Description=Run mail-cert once a day
 808
 809 [Timer]
 810 OnCalendar=daily
 811
 812 [Install]
 813 WantedBy=timers.target
 814 EOF
 815
 816
 817 wghost=${HOSTNAME}wg.b8.nz
 818 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 819   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 820           certonly --manual --preferred-challenges=dns \
 821           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 822           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 823           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 824 fi
 825
 826 # * fail2ban
 827
 828 # todo: test that these configs actually work, eg run
 829 # s iptables-exim -S
 830 # and see someone is banned.
 831
 832 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 833     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 834 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 835 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 836
 837 # Fail2Ban configuration file
 838 #
 839 # Author: Daniel Black
 840 #
 841 # This is a included configuration file and includes the definitions for the iptables
 842 # used in all iptables based actions by default.
 843 #
 844 # The user can override the defaults in iptables-common.local
 845 #
 846 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 847 #       made config file IPv6 capable (see new section Init?family=inet6)
 848
 849 [INCLUDES]
 850
 851 after = iptables-blocktype.local
 852         iptables-common.local
 853 # iptables-blocktype.local is obsolete
 854
 855 [Definition]
 856
 857 # Option:  actionflush
 858 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 859 # Values:  CMD
 860 #
 861 actionflush = <iptables> -F f2b-<name>
 862
 863
 864 [Init]
 865
 866 # Option:  chain
 867 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 868 #          added
 869 # Values:  STRING  Default: INPUT
 870 chain = INPUT
 871
 872 # Default name of the chain
 873 #
 874 name = default
 875
 876 # Option:  port
 877 # Notes.:  specifies port to monitor
 878 # Values:  [ NUM | STRING ]  Default:
 879 #
 880 port = ssh
 881
 882 # Option:  protocol
 883 # Notes.:  internally used by config reader for interpolations.
 884 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 885 #
 886 protocol = tcp
 887
 888 # Option:  blocktype
 889 # Note:    This is what the action does with rules. This can be any jump target
 890 #          as per the iptables man page (section 8). Common values are DROP
 891 #          REJECT, REJECT --reject-with icmp-port-unreachable
 892 # Values:  STRING
 893 blocktype = REJECT --reject-with icmp-port-unreachable
 894
 895 # Option:  returntype
 896 # Note:    This is the default rule on "actionstart". This should be RETURN
 897 #          in all (blocking) actions, except REJECT in allowing actions.
 898 # Values:  STRING
 899 returntype = RETURN
 900
 901 # Option:  lockingopt
 902 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 903 #          running concurrently and causing irratic behavior.  -w was introduced
 904 #          in iptables 1.4.20, so might be absent on older systems
 905 #          See https://github.com/fail2ban/fail2ban/issues/1122
 906 # Values:  STRING
 907 lockingopt = -w
 908
 909 # Option:  iptables
 910 # Notes.:  Actual command to be executed, including common to all calls options
 911 # Values:  STRING
 912 iptables = /usr/local/bin/iptables-exim <lockingopt>
 913
 914
 915 [Init?family=inet6]
 916
 917 # Option:  blocktype (ipv6)
 918 # Note:    This is what the action does with rules. This can be any jump target
 919 #          as per the iptables man page (section 8). Common values are DROP
 920 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 921 # Values:  STRING
 922 blocktype = REJECT --reject-with icmp6-port-unreachable
 923
 924 # Option:  iptables (ipv6)
 925 # Notes.:  Actual command to be executed, including common to all calls options
 926 # Values:  STRING
 927 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 928 EOF
 929
 930 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 931 [exim]
 932 enabled  = true
 933 port     = 25,587
 934 filter   = exim
 935 banaction = iptables-exim
 936 EOF
 937 if $ir; then
 938   m systemctl restart fail2ban
 939 fi
 940
 941 # * common exim4 config
 942
 943
 944 ## old, not using forward files anymore
 945 rm -fv $uhome/.forward /root/.forward
 946
 947
 948 # Make all system users be aliases. preventative
 949 # prevents things like cron mail for user without alias
 950 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 951   if [[ ! $user ]]; then
 952     continue
 953   fi
 954   if ! grep -q "^$user:" /etc/aliases; then
 955     echo "$user: root" |m tee -a /etc/aliases
 956   fi
 957 done
 958
 959
 960 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 961   case $HOSTNAME in
 962     $MAIL_HOST)
 963       sed -i "/^user:/d" /etc/aliases
 964       ;;
 965     *)
 966       if ! grep -q "^$user:" /etc/aliases; then
 967         echo "$user: root" |m tee -a /etc/aliases
 968       fi
 969       ;;
 970   esac
 971 done
 972
 973 if ! grep -q "^ncsoft:" /etc/aliases; then
 974   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
 975 fi
 976
 977
 978
 979 m gpasswd -a iank adm #needed for reading logs
 980
 981 ### make local bounces go to normal maildir
 982 # local mail that bounces goes to /Maildir or /root/Maildir
 983 dirs=(/m/md/bounces/{cur,tmp,new})
 984 m mkdir -p ${dirs[@]}
 985 m chown iank:iank /m /m/md
 986 m ln -sfT /m/md /m/iank
 987 m chmod 771 /m /m/md
 988 m chown -R $u:Debian-exim /m/md/bounces
 989 m chmod 775 ${dirs[@]}
 990 m usermod -a -G Debian-exim $u
 991 for d in /Maildir /root/Maildir; do
 992   if [[ ! -L $d ]]; then
 993     m rm -rf $d
 994   fi
 995   m ln -sf -T /m/md/bounces $d
 996 done
 997
 998 # dkim, client passwd file
 999 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1000 f=/p/c/filesystem/etc/exim4/passwd.client
1001 if [[ -e $f ]]; then
1002   files+=($f)
1003 fi
1004 if (( ${#files[@]} )); then
1005   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1006     ${files[@]} /etc/exim4
1007 fi
1008
1009 # by default, only 10 days of logs are kept. increase that.
1010 m sed -ri 's/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1011
1012
1013 ## disabled. not using .forward files, but this is still interesting
1014 ## for reference.
1015 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1016 # # i only need .forwards, so just doing that one.
1017 # cd /etc/exim4/conf.d/router
1018 # b=userforward_higher_priority
1019 # # replace the router name so it is unique
1020 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1021
1022 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1023
1024 # alerts is basically the postmaster address
1025 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1026 \$a root: alerts@iankelling.org
1027 /^root:/d
1028 EOF
1029
1030 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1031 ncsoft@zroe.org graceq2323@gmail.com hE
1032 EOF
1033
1034 # old name
1035 rm -fv /etc/exim4/conf.d/retry/37_retry
1036
1037 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1038 # Retry fast for my own domains
1039 iankelling.org * F,1d,10m;F,14d,1h
1040 amnimal.ninja * F,1d,10m;F,14d,1h
1041 expertpathologyreview.com * F,1d,10m;F,14d,1h
1042 je.b8.nz * F,1d,10m;F,14d,1h
1043 zroe.org * F,1d,10m;F,14d,1h
1044 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1045 EOF
1046
1047
1048 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1049 cat >/etc/exim4/conf.d/main/000_local <<EOF
1050 MAIN_TLS_ENABLE = true
1051
1052 # require tls connections for all smarthosts
1053 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1054
1055 # debian exim config added this in 2016 or so?
1056 # it's part of the smtp spec, to limit lines to 998 chars
1057 # but a fair amount of legit mail does not adhere to it. I don't think
1058 # this should be default, like it says in
1059 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1060 # todo: the bug for introducing this was about headers, but
1061 # the fix maybe is for all lines? one says gmail rejects, the
1062 # other says gmail does not reject. figure out and open a new bug.
1063 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1064
1065 # more verbose logs
1066 MAIN_LOG_SELECTOR = +all
1067
1068 # Based on spec, seems like a good idea to be nice.
1069 smtp_return_error_details = true
1070
1071 # normally empty, I set this so I can set the envelope address
1072 # when doing mail redelivery to invoke filters. Also allows
1073 # me exiqgrep and stuff.
1074 MAIN_TRUSTED_GROUPS = $u
1075
1076 # default is 10. when exim has been down for a bit, fsf mailserver
1077 # will do a big send in one connection, then exim decides to put
1078 # the messages in the queue instead of delivering them, to avoid
1079 # spawning too many delivery processes. This is the same as the
1080 # fsfs value. And the corresponding one for how many messages
1081 # to send out in 1 connection remote_max_parallel = 256
1082 smtp_accept_queue_per_connection = 500
1083
1084
1085 DKIM_CANON = relaxed
1086 DKIM_SELECTOR = li
1087
1088 # from comments in
1089 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1090 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1091 # There could be some circumstance when the
1092 # from: isnt our domain, but the envelope sender is
1093 # and so still want to sign, but I cant think of any case.
1094 DKIM_DOMAIN = \${lc:\${domain:\$rh_from:}}
1095 # The file is based on the outgoing domain-name in the from-header.
1096 # sign if key exists
1097 DKIM_PRIVATE_KEY = \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
1098
1099 # most of the ones that gmail seems to use.
1100 # Exim has horrible default of signing unincluded
1101 # list- headers since they got mentioned in an
1102 # rfc, but this messes up mailing lists, like gnu/debian which want to
1103 # keep your dkim signature intact but add list- headers.
1104 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1105
1106 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1107
1108 hostlist iank_trusted = <; \\
1109 # veth0
1110 10.173.8.1 ; \\
1111 # li li_ip6
1112 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \\
1113 # li_vpn_net li_vpn_net_ip6s
1114 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \\
1115 # bk bk_ip6
1116 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \\
1117 # je je_ipv6
1118 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \\
1119 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1120 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1121 EOF
1122
1123 rm -fv /etc/exim4/rcpt_local_acl # old path
1124
1125 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1126 # This acl already exists in rcpt, this just makes it more widespread.
1127 # See the comment there for its rationale. The reason it needs to be
1128 # more widespread is that I've turned on sender verification, but cron
1129 # emails can fail sender verification since I may be in a network that
1130 # doesn't have my local dns.
1131 accept
1132   authenticated = *
1133
1134 # i setup a local programs smtp to mail.iankelling.org, this
1135 # skips sender verification for it.
1136 accept
1137   hosts = 10.173.8.1
1138 EOF
1139
1140 rm -fv /etc/exim4/data_local_acl # old path
1141 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1142 # Except for the "condition =", this was
1143 # a comment in the check_data acl. The comment about this not
1144 # being suitable has been changed in newer exim versions. The only thing
1145 # related I found was to
1146 # add the condition =, cuz spamassassin has problems with big
1147 # messages and spammers don't bother with big messages,
1148 # but I've increased the size from 10k
1149 # suggested in official docs, and 100k in the wiki example because
1150 # those docs are rather old and I see a 110k spam message
1151 # pretty quickly looking through my spam folder.
1152
1153 warn
1154   !hosts = +iank_trusted
1155   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1156
1157 warn
1158   !hosts = +iank_trusted
1159   condition = ${if < {$message_size}{5000K}}
1160   spam = Debian-exim:true
1161   add_header = X-Spam_score_int: $spam_score_int
1162   add_header = X-Spam_score: $spam_score
1163   add_header = X-Spam_bar: $spam_bar
1164   add_header = X-Spam_report: $spam_report
1165   add_header = X-Spam_action: $spam_action
1166
1167 warn
1168   condition = ${if def:malware_name}
1169   remove_header = Subject:
1170   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1171   log_message = heuristic malware warning: $malware_name
1172
1173 #accept
1174 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1175 #  dmarc_status = reject:quarantine
1176 #  add_header = Reply-to: dmarctest@iankelling.org
1177
1178 EOF
1179
1180 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<EOF
1181 ### router/900_exim4-config_local_user
1182 #################################
1183
1184 # This router matches local user mailboxes. If the router fails, the error
1185 # message is "Unknown user".
1186 local_user:
1187   debug_print = "R: local_user for \$local_part@\$domain"
1188   driver = accept
1189   domains = +local_domains
1190 # ian: default file except where mentioned.
1191 # ian: commented this. I get all local parts. for bk, an rcpt
1192 # check handles checking with dovecot, and the only router
1193 # after this is root.
1194 #  local_parts = ! root
1195   transport = LOCAL_DELIVERY
1196   cannot_route_message = Unknown user
1197 # ian: added for + addressing.
1198   local_part_suffix = +*
1199   local_part_suffix_optional
1200 EOF
1201 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1202 dovecot_lmtp:
1203   driver = lmtp
1204   socket = /var/run/dovecot/lmtp
1205   #maximum number of deliveries per batch, default 1
1206   batch_max = 200
1207   envelope_to_add
1208 EOF
1209
1210 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1211 # same as debians 30_exim4-config_remote_smtp, but
1212 # with interface added at the end.
1213
1214 remote_smtp_vpn:
1215   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1216   driver = smtp
1217 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1218   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1219 .endif
1220 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1221   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1222 .endif
1223 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1224   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1225 .endif
1226 .ifdef REMOTE_SMTP_RETURN_PATH
1227   return_path = REMOTE_SMTP_RETURN_PATH
1228 .endif
1229 .ifdef REMOTE_SMTP_HELO_DATA
1230   helo_data=REMOTE_SMTP_HELO_DATA
1231 .endif
1232 .ifdef DKIM_DOMAIN
1233 dkim_domain = DKIM_DOMAIN
1234 .endif
1235 .ifdef DKIM_SELECTOR
1236 dkim_selector = DKIM_SELECTOR
1237 .endif
1238 .ifdef DKIM_PRIVATE_KEY
1239 dkim_private_key = DKIM_PRIVATE_KEY
1240 .endif
1241 .ifdef DKIM_CANON
1242 dkim_canon = DKIM_CANON
1243 .endif
1244 .ifdef DKIM_STRICT
1245 dkim_strict = DKIM_STRICT
1246 .endif
1247 .ifdef DKIM_SIGN_HEADERS
1248 dkim_sign_headers = DKIM_SIGN_HEADERS
1249 .endif
1250 .ifdef TLS_DH_MIN_BITS
1251 tls_dh_min_bits = TLS_DH_MIN_BITS
1252 .endif
1253 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1254 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1255 .endif
1256 .ifdef REMOTE_SMTP_PRIVATEKEY
1257 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1258 .endif
1259 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1260   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1261 .endif
1262 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1263   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1264 .endif
1265   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1266 EOF
1267
1268 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1269 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1270
1271 smarthost_dkim:
1272   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1273   driver = smtp
1274   multi_domain
1275 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1276   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1277 .endif
1278   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1279         {\
1280         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1281         }\
1282         {} \
1283       }
1284 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1285   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1286 .endif
1287 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1288   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1289 .endif
1290 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1291   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1292 .endif
1293 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1294   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1295 .endif
1296 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1297   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1298 .endif
1299 .ifdef REMOTE_SMTP_RETURN_PATH
1300   return_path = REMOTE_SMTP_RETURN_PATH
1301 .endif
1302 .ifdef REMOTE_SMTP_HELO_DATA
1303   helo_data=REMOTE_SMTP_HELO_DATA
1304 .endif
1305 .ifdef TLS_DH_MIN_BITS
1306 tls_dh_min_bits = TLS_DH_MIN_BITS
1307 .endif
1308 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1309 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1310 .endif
1311 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1312 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1313 .endif
1314 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1315   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1316 .endif
1317 .ifdef DKIM_DOMAIN
1318 dkim_domain = DKIM_DOMAIN
1319 .endif
1320 .ifdef DKIM_SELECTOR
1321 dkim_selector = DKIM_SELECTOR
1322 .endif
1323 .ifdef DKIM_PRIVATE_KEY
1324 dkim_private_key = DKIM_PRIVATE_KEY
1325 .endif
1326 .ifdef DKIM_CANON
1327 dkim_canon = DKIM_CANON
1328 .endif
1329 .ifdef DKIM_STRICT
1330 dkim_strict = DKIM_STRICT
1331 .endif
1332 .ifdef DKIM_SIGN_HEADERS
1333 dkim_sign_headers = DKIM_SIGN_HEADERS
1334 .endif
1335 EOF
1336
1337
1338 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1339 # default stuff, i havent checked if its needed
1340 dc_minimaldns='false'
1341 dc_relay_nets=''
1342 CFILEMODE='644'
1343 dc_use_split_config='true'
1344 dc_mailname_in_oh='true'
1345 EOF
1346
1347
1348 # * radicale
1349 if mailhost; then
1350   if ! mountpoint /o; then
1351     echo "error /o is not a mountpoint" >&2
1352     exit 1
1353   fi
1354
1355   # davx/davdroid setup instructions at the bottom
1356
1357   # main docs:
1358   # http://radicale.org/user_documentation/
1359   # https://davdroid.bitfire.at/configuration/
1360
1361   # note on debugging: if radicale can't bind to the address,
1362   # in the log it just says "Starting Radicale". If you run
1363   # it in the foreground, it will give more info. Background
1364   # plus debug does not help.
1365   # sudo -u radicale radicale -D -f
1366
1367   # created password file with:
1368   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1369   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1370   # # setup chgrp www-data in ./conflink
1371
1372   pi-nostart radicale
1373
1374   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1375 [Unit]
1376 # this unit is configured to start and stop whenever
1377 # $vpnser does
1378
1379 After=network.target network-online.target mailnn.service $vpnser
1380 BindsTo=$vpnser
1381
1382 Wants=network-online.target
1383 JoinsNamespaceOf=mailnn.service
1384 StartLimitIntervalSec=0
1385
1386 [Service]
1387 PrivateNetwork=true
1388 BindPaths=$bindpaths
1389 Restart=always
1390 # time to sleep before restarting a service
1391 RestartSec=20
1392
1393 [Install]
1394 # for openvpn
1395 RequiredBy=$vpnser
1396 EOF
1397
1398
1399   # use persistent uid/gid
1400   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1401   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1402   if [[ $uid != 609 ]]; then
1403     m systemctl stop radicale ||:
1404     m usermod -u 609 radicale
1405     m groupmod -g 609 radicale
1406     m usermod -g 609 radicale
1407   fi
1408   m find /o/radicale  -xdev -exec chown -h 609 {} +
1409   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1410
1411
1412   # I moved /var/lib/radicale after it's initialization.
1413   # I did a sudo -u radicale git init in the collections subfolder
1414   # after it gets created, per the git docs.
1415   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1416
1417   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1418
1419   # more config is for li in distro-end
1420
1421   # coment in this file says this is needed for it to run on startup
1422   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1423
1424   # comments say default is 0.0.0.0:5232
1425   m setini hosts 10.8.0.4:5232 server
1426   # https://radicale.org/2.1.html
1427   m setini type http_x_remote_user auth
1428
1429
1430   # disable power management feature, set to 240 min sync interval,
1431   # so it shouldn't be bad.
1432
1433   # davdroid from f-druid.
1434   # login with url and user name
1435   # url https://cal.iankelling.org/ian
1436   # username ian
1437   # pass, see password manager for radicale
1438   #
1439   # add account dialog:
1440   #
1441   # set account name as ian@iankelling.org, per help text below the
1442   # field.
1443   #
1444   # switch to groups are per-contact categories,
1445   # per https://davdroid.bitfire.at/configuration/radicale/
1446   #
1447   #
1448   # After setting up account, I added one address book, named
1449   # ianaddr. calender was already created, named ian. checked boxes under
1450   # both. synced.
1451   #
1452   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1453   #
1454   # ignorable background info:
1455   #
1456   # opentasks uses the calendar file.
1457   #
1458   # The address book I created got a uuid as a name for the file. Note
1459   # the .props file says if it's a calendar or addressbook.
1460   #
1461   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1462   # both show the requests happening. Without creating the address book,
1463   # after creating a contact, a sync would delete it.
1464   #
1465   # Address books correspond to .props files in the radicale dir.
1466   #
1467   #  Some background is here,
1468   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1469   # which shows separate vcard option is from rfc 6350, the other is 2426,
1470   # radicale page says it implements the former not the latter,
1471   # which conflicts with the documentation of which to select, but whatever.
1472   # http://radicale.org/technical_choices/
1473   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1474   #
1475   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1476
1477   # Note, radicale had built-in git support to track changes, but they
1478   # removed it in 2.0.
1479
1480 fi
1481
1482 # * dovecot
1483
1484 # ** $MAIL_HOST|bk|je)
1485 case $HOSTNAME in
1486   $MAIL_HOST|bk|je)
1487     # based on a little google and package search, just the dovecot
1488     # packages we need instead of dovecot-common.
1489     #
1490     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1491     # directly.  The reason to do this is to use dovecot\'s sieve, which
1492     # can generally do more than exims filters (a few things less) and
1493     # sieve has the benefit of being supported in postfix and
1494     # proprietary/weird environments, so there is more examples on the
1495     # internet.
1496     pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1497
1498     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1499       if [[ -e $f ]]; then
1500         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1501         break
1502       fi
1503     done
1504     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1505       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1506     done
1507
1508     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1509     i /etc/dovecot/dhparam <<'EOF'
1510 -----BEGIN DH PARAMETERS-----
1511 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1512 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1513 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1514 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1515 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1516 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1517 -----END DH PARAMETERS-----
1518 EOF
1519     {
1520       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1521         cat <<'EOF'
1522 ssl_cert = </etc/exim4/fullchain.pem
1523 ssl_key = </etc/exim4/privkey.pem
1524 EOF
1525       else
1526         cat <<'EOF'
1527 ssl_cert = </etc/exim4/exim.crt
1528 ssl_key = </etc/exim4/exim.key
1529 EOF
1530       fi
1531       cat <<EOF
1532 # https://ssl-config.mozilla.org
1533 ssl = required
1534 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1535 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
1536 ssl_protocols = TLSv1.2
1537 ssl_prefer_server_ciphers = no
1538
1539 protocol lmtp {
1540 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1541 # default is just \$mail_plugins
1542   mail_plugins = \$mail_plugins sieve
1543 }
1544 EOF
1545       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1546         cat <<EOF
1547 ssl_dh = </etc/dovecot/dhparam
1548 EOF
1549       fi
1550     } >/etc/dovecot/local.conf
1551
1552     ;;&
1553
1554   # **  $MAIL_HOST)
1555   $MAIL_HOST)
1556     # If we changed 90-sieve.conf and removed the active part of the
1557     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1558     # default config if not needed. This won\'t work as a symlink in /a/c
1559     # unfortunately.
1560     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1561
1562     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1563       m touch $uhome/sieve/personal{,end}{,test}.sieve
1564     fi
1565
1566     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1567     cat >>/etc/dovecot/local.conf <<EOF
1568 # simple password file based login
1569 !include conf.d/auth-passwdfile.conf.ext
1570
1571 # ian: %u is used for alerts user vs iank
1572 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1573 mail_uid = $u
1574 mail_gid = $u
1575
1576 protocol lmtp {
1577 # For a normal setup with exim, we need something like this, which
1578 # removes the domain part
1579 #  auth_username_format = %Ln
1580 #
1581 #  or else # Exim says something like
1582 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1583 # Dovecot verbose log says something like
1584 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1585 # reference: http://wiki.dovecot.org/LMTP/Exim
1586 #
1587 # However, I use this to direct all mail to the same inbox.
1588 # A normal way to do this, which I did at first is to have
1589 # a router in exim almost at the end, eg 950,
1590 #local_catchall:
1591 #  debug_print = "R: catchall for \$local_part@\$domain"
1592 #  driver = redirect
1593 #  domains = +local_domains
1594 #  data = $u
1595 # based on
1596 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1597 # with superflous options removed.
1598 # However, this causes the envelope to be rewritten,
1599 # which makes filtering into mailboxes a little less robust or more complicated,
1600 # so I've done it this way instead. it also requires
1601 # modifying the local router in exim.
1602   auth_username_format = $u
1603 }
1604 EOF
1605     ;;&
1606   # **  bk|je)
1607   bk|je)
1608     chown -R mail.mail /m/md
1609
1610     f=/etc/dovecot/conf.d/10-auth.conf
1611     if [[ -e $f ]]; then
1612       mv $f $f-iank-disabled
1613     fi
1614
1615     cat >>/etc/dovecot/local.conf <<EOF
1616 !include /etc/dovecot/local.conf.ext
1617
1618 # for debugging info, uncomment these.
1619 # logs go to syslog and to /var/log/mail.log
1620 #auth_verbose=yes
1621 #mail_debug=yes
1622
1623
1624 protocol lmtp {
1625 # This downcases the localpart. default is case sensitive.
1626 # case sensitive local part will miss out on valid email when some person or system
1627 # mistakenly capitalizes things.
1628   auth_username_format = %Lu
1629 }
1630
1631 # make 147 only listen on localhost, plan to use for nextcloud.
1632 # copied from mailinabox
1633 service imap-login {
1634   inet_listener imap {
1635     address = 127.0.0.1
1636   }
1637 }
1638 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1639 service auth {
1640   unix_listener auth-client {
1641     user = Debian-exim
1642     group = Debian-exim
1643   }
1644 }
1645
1646
1647 plugin {
1648   sieve_before = /etc/dovecot/sieve-spam.sieve
1649   # from mailinabox
1650   sieve = /m/sieve/%d/%n.sieve
1651   sieve_dir = /m/sieve/%d/%n
1652 }
1653
1654
1655 # all taken from mailinabox.
1656 mail_location = maildir:/m/md/%d/%n
1657 # meh, ok.
1658 mail_privileged_group = mail
1659 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1660 first_valid_uid = 1
1661
1662 # todo: test these changes in the universal config
1663 # mailboxes taken from mailinabox but removed
1664 # settings duplicate to defaults
1665 namespace inbox {
1666   mailbox INBOX {
1667     auto = subscribe
1668   }
1669   mailbox Spam {
1670     special_use = \Junk
1671     auto = subscribe
1672   }
1673   mailbox Drafts {
1674     auto = subscribe
1675   }
1676   mailbox Sent {
1677     auto = subscribe
1678   }
1679   mailbox Trash {
1680     auto = subscribe
1681   }
1682   mailbox Archive {
1683     special_use = \Archive
1684     auto = subscribe
1685   }
1686 }
1687 auth_mechanisms = plain login
1688 EOF
1689
1690     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1691 require ["regex", "fileinto", "imap4flags"];
1692
1693 if allof (header :regex "X-Spam-Status" "^Yes") {
1694   fileinto "Spam";
1695   stop;
1696 }
1697 EOF
1698
1699     i /etc/dovecot/local.conf.ext <<'EOF'
1700 passdb {
1701   driver = sql
1702   args = /etc/dovecot/dovecot-sql.conf.ext
1703 }
1704 userdb {
1705   driver = sql
1706   args = /etc/dovecot/dovecot-sql.conf.ext
1707 }
1708
1709 EOF
1710
1711     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1712 # from mailinabox
1713 driver = sqlite
1714 connect = /m/rc/users.sqlite
1715 default_pass_scheme = SHA512-CRYPT
1716 password_query = SELECT email as user, password FROM users WHERE email='%u';
1717 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1718 iterate_query = SELECT email AS user FROM users;
1719 EOF
1720     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1721
1722     # db needs to be in a www-data writable directory
1723     db=/m/rc/users.sqlite
1724     if [[ ! -s $db ]]; then
1725       m mkdir -p /m/rc
1726       m sqlite3 $db <<'EOF'
1727 CREATE TABLE users (
1728 id INTEGER PRIMARY KEY AUTOINCREMENT,
1729 email TEXT NOT NULL UNIQUE,
1730 password TEXT NOT NULL,
1731 extra,
1732 privileges TEXT NOT NULL DEFAULT '');
1733 EOF
1734     fi
1735     # example of adding a user:
1736     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1737     # sqlite3 /m/rc/users.sqlite <<'EOF'
1738     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1739     #EOF
1740     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1741
1742     # this should be at the end since it requires a valid dovecot config
1743     m sievec /etc/dovecot/sieve-spam.sieve
1744     ;;&
1745   # **  bk)
1746   bk)
1747     # roundcube uses this
1748     mkdir -p /m/sieve
1749     chown mail.mail /m/sieve
1750     m pi dovecot-managesieved
1751     ;;
1752 esac
1753
1754 # * thunderbird autoconfig setup
1755
1756 bkdomains=(expertpathologyreview.com amnimal.ninja)
1757 if [[ $HOSTNAME == bk ]]; then
1758   for domain in ${bkdomains[@]}; do
1759     m /a/exe/web-conf apache2 autoconfig.$domain
1760     dir=/var/www/autoconfig.$domain/html/mail
1761     m mkdir -p $dir
1762     # taken from mailinabox
1763     i $dir/config-v1.1.xml <<EOF
1764 <?xml version="1.0" encoding="UTF-8"?>
1765 <clientConfig version="1.1">
1766     <emailProvider id="$domain">
1767       <domain>$domain</domain>
1768
1769       <displayName>$domain Mail</displayName>
1770       <displayShortName>$domain</displayShortName>
1771
1772       <incomingServer type="imap">
1773          <hostname>mail2.iankelling.org</hostname>
1774          <port>993</port>
1775          <socketType>SSL</socketType>
1776          <username>%EMAILADDRESS%</username>
1777          <authentication>password-cleartext</authentication>
1778       </incomingServer>
1779
1780       <outgoingServer type="smtp">
1781          <hostname>mail2.iankelling.org</hostname>
1782          <port>587</port>
1783          <socketType>STARTTLS</socketType>
1784          <username>%EMAILADDRESS%</username>
1785          <authentication>password-cleartext</authentication>
1786          <addThisServer>true</addThisServer>
1787          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1788       </outgoingServer>
1789
1790       <documentation url="https://$domain/">
1791          <descr lang="en">$domain website.</descr>
1792       </documentation>
1793     </emailProvider>
1794
1795     <webMail>
1796       <loginPage url="https://$domain/roundcube" />
1797       <loginPageInfo url="https://$domain/roundcube" >
1798         <username>%EMAILADDRESS%</username>
1799         <usernameField id="rcmloginuser" name="_user" />
1800         <passwordField id="rcmloginpwd" name="_pass" />
1801         <loginButton id="rcmloginsubmit" />
1802       </loginPageInfo>
1803     </webMail>
1804     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1805 </clientConfig>
1806 EOF
1807   done
1808 fi
1809
1810 # * roundcube setup
1811
1812 if [[ $HOSTNAME == bk ]]; then
1813
1814   # zip according to /installer
1815   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1816   # $config['enable_installer'] = true;
1817   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1818
1819   ### begin composer install
1820   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1821   # cd $(mktemp -d)
1822   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1823   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1824   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1825   #   echo 'ERROR: Invalid composer installer checksum' >&2
1826   #   rm -fv composer-setup.php
1827   #   exit 1
1828   # fi
1829   # m php composer-setup.php --quiet
1830   # rm -fv composer-setup.php
1831   # m mv composer.phar /usr/local/bin
1832
1833   # the above method gets composer2, carddav plugin at least doesnt work with that
1834   # yet, it was just released 10-24-2020.
1835   m cd /usr/local/bin
1836   m wget -nv -N https://getcomposer.org/composer-1.phar
1837   chmod +x composer-1.phar
1838   ### end composer install
1839
1840   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1841   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1842   # point debian cronjob to our local install, preventing daily cron error
1843
1844   # debian's cronjob will fail, remove both paths it uses just to be sure
1845   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1846
1847   #### begin dl roundcube
1848   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1849   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1850   cd /a/opt
1851   if [[ -e $f ]]; then
1852     timestamp=$(stat -c %Y $f)
1853   else
1854     timestamp=0
1855   fi
1856   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1857   new_timestamp=$(stat -c %Y $f)
1858   for rcdir in ${rcdirs[@]}; do
1859     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1860       m tar -C /usr/local/lib --no-same-owner -zxf $f
1861       m rm -rf $rcdir
1862       m mv /usr/local/lib/roundcubemail-$v $rcdir
1863     fi
1864   done
1865   #### end dl roundcube
1866
1867   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1868     domain=${bkdomains[i]}
1869     rcdir=${rcdirs[i]}
1870     rcbase=${rcdir##*/}
1871     ncdir=${ncdirs[i]}
1872
1873     # copied from debians cronjob
1874     i /etc/cron.d/$rcbase <<EOF
1875 #  Roundcube database cleaning: finally removes all records that are
1876 #  marked as deleted.
1877 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1878 EOF
1879
1880     m /a/exe/web-conf - apache2 $domain <<EOF
1881 Alias /roundcube $rcdir
1882 ### begin roundcube settings
1883 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1884 <Directory $rcdir/>
1885   Options +FollowSymLinks
1886   # This is needed to parse $rcdir/.htaccess.
1887   AllowOverride All
1888   Require all granted
1889 </Directory>
1890 # Protecting basic directories:
1891 <Directory $rcdir/config>
1892   Options -FollowSymLinks
1893   AllowOverride None
1894 </Directory>
1895 ### end roundcube settings
1896
1897
1898 ### begin nextcloud settings
1899 Alias /nextcloud "$ncdir/"
1900 <Directory $ncdir/>
1901   Require all granted
1902   AllowOverride All
1903   Options FollowSymLinks MultiViews
1904
1905   <IfModule mod_dav.c>
1906     Dav off
1907   </IfModule>
1908
1909 </Directory>
1910
1911 # based on install checker, links to
1912 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1913 # their example was a bit wrong, I figured it out by adding
1914 # LogLevel warn rewrite:trace5
1915 # then watching the apache logs
1916
1917 RewriteEngine on
1918 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
1919 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
1920 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
1921 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
1922 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
1923 ### end nextcloud settings
1924 EOF
1925     if [[ ! -e $rcdir/config/secret ]]; then
1926       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
1927     fi
1928     secret=$(cat $rcdir/config/secret)
1929
1930     rclogdir=/var/log/$rcbase
1931     rctmpdir=/var/tmp/$rcbase
1932     rcdb=/m/rc/$rcbase.sqlite
1933     # config from mailinabox
1934     i $rcdir/config/config.inc.php <<EOF
1935 <?php
1936 \$config = array();
1937 # debian creates this for us
1938 \$config['log_dir'] = '$rclogdir/';
1939 # debian also creates a temp dir, but it is under its install dir,
1940 # seems better to have our own.
1941 \$config['temp_dir'] = '$rctmpdir/';
1942 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
1943 \$config['default_host'] = 'ssl://localhost';
1944 \$config['default_port'] = 993;
1945 \$config['imap_conn_options'] = array(
1946   'ssl'         => array(
1947      'verify_peer'  => false,
1948      'verify_peer_name'  => false,
1949    ),
1950  );
1951 \$config['imap_timeout'] = 15;
1952 \$config['smtp_server'] = 'tls://127.0.0.1';
1953 \$config['smtp_conn_options'] = array(
1954   'ssl'         => array(
1955      'verify_peer'  => false,
1956      'verify_peer_name'  => false,
1957    ),
1958  );
1959 \$config['product_name'] = 'webmail';
1960 \$config['des_key'] = '$secret';
1961 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
1962 \$config['skin'] = 'elastic';
1963 \$config['login_autocomplete'] = 2;
1964 \$config['password_charset'] = 'UTF-8';
1965 \$config['junk_mbox'] = 'Spam';
1966 # disable builtin addressbook
1967 \$config['address_book_type'] = '';
1968 ?>
1969 EOF
1970
1971     m mkdir -p $rclogdir
1972     m chmod 750 $rclogdir
1973     m chown www-data:adm $rclogdir
1974     # note: subscribed to updates:
1975     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
1976     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
1977     m mkdir -p $rctmpdir /m/rc
1978     m chown -R www-data.www-data $rctmpdir /m/rc
1979     m chmod 750 $rctmpdir
1980     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
1981     # todo: check for other mailinabox things
1982     m sudo -u www-data touch $rclogdir/errors.log
1983
1984     #### begin carddav install
1985     # This is the official roundcube carddav repo.
1986     # Install doc suggests downloading with composer, but that
1987     # didnt work, it said some ldap package for roundcube was missing,
1988     # but I dont want to download some extra ldap thing.
1989     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
1990     verf=$rcdir/plugins/carddav/myversion
1991     upgrade=false
1992     install=false
1993     v=4.0.0
1994     if [[ -e $verf ]]; then
1995       if [[ $(cat $verf) != "$v" ]]; then
1996         install=true
1997         upgrade=true
1998       fi
1999     else
2000       install=true
2001     fi
2002     if $install; then
2003       m rm -rf $rcdir/plugins/carddav
2004       tmpd=$(mktemp -d)
2005       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2006       cd $rcdir/plugins
2007       tar xzf $tmpd/t.tgz
2008       rm -rf $tmpd
2009       m chown -R www-data:www-data $rcdir/plugins/carddav
2010       m cd $rcdir/plugins/carddav
2011       if $upgrade; then
2012         m sudo -u www-data composer-1.phar update --no-dev
2013       else
2014         m sudo -u www-data composer-1.phar install --no-dev
2015       fi
2016       m chown -R root:root $rcdir/plugins/carddav
2017       echo $v >$verf
2018     fi
2019
2020     # So, strangely, this worked in initial testing, but then
2021     # on first run it wouldn't show the existing contacts until
2022     # I went into the carddav settings and did "force immediate sync",
2023     # which seemed to fix things. Note, some of these settings
2024     # get initalized per/addressbook in the db, then need changing
2025     # there or through the settings menu.
2026
2027     # About categories, see https://www.davx5.com/tested-with/nextcloud
2028     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2029     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2030 <?php
2031 \$prefs['_GLOBAL']['hide_preferences'] = false;
2032 \$prefs['davserver'] = array(
2033 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2034   'name'         =>  'Main',
2035   'username'     =>  '%u', // login username
2036   'password'     =>  '%p', // login password
2037   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2038   'active'       =>  true,
2039   'readonly'     =>  false,
2040   'refresh_time' => '00:10:00',
2041   'fixed'        =>  array('username','password'),
2042   'use_categories' => false,
2043   'hide'        =>  false,
2044 );
2045 ?>
2046 EOF
2047     #### end carddav install
2048
2049     cd $rcdir/plugins
2050     if [[ ! -d html5_notifier ]]; then
2051       m git clone https://github.com/stremlau/html5_notifier
2052     fi
2053     cd $rcdir/plugins/html5_notifier
2054     m git pull --rebase
2055
2056     # todo: try out roundcube plugins: thunderbird labels
2057
2058     # Password changing plugin settings
2059     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2060 # following are from mailinabox
2061 $config['password_minimum_length'] = 8;
2062 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2063 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2064 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2065 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2066 $config['password_dovecotpw_with_method'] = true;
2067 EOF
2068     # so PHP can use doveadm, for the password changing plugin
2069     m usermod -a -G dovecot www-data
2070     m usermod -a -G mail $u
2071
2072     # so php can update passwords
2073     m chown www-data:dovecot /m/rc/users.sqlite
2074     m chmod 664 /m/rc/users.sqlite
2075
2076     # Run Roundcube database migration script (database is created if it does not exist)
2077     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2078     m chown www-data:www-data $rcdb
2079     m chmod 664 $rcdb
2080   done # end loop over domains and rcdirs
2081
2082   ### begin php setup for rc ###
2083   # Enable PHP modules.
2084   m phpenmod -v php mcrypt imap
2085   # dpkg says this is required
2086   m a2enmod proxy_fcgi setenvif
2087   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2088   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2089   m a2enconf $fpm
2090   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2091   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2092   m a2dismod php$phpver
2093   # according to /install, we should set date.timezone,
2094   # but that is dumb, the system already has the right zone in
2095   # $rclogdir/errors.log
2096   # todo: consider other settings in
2097   # /a/opt/mailinabox/setup/nextcloud.sh
2098   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2099 apc.enable_cli = 1
2100 EOF
2101
2102   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2103 date.timezone = "America/New_York"
2104 # for nextcloud
2105 upload_max_filesize = 2000M
2106 post_max_size = 2000M
2107 # install checker, nextcloud/settings/admin/overview
2108 memory_limit = 512M
2109 EOF
2110   m systemctl restart $fpm
2111   # dunno if reload/restart is needed
2112   m systemctl reload apache2
2113   # note bk backups are defined in crontab outside this file
2114   ### end php setup for rc ###
2115
2116 fi # end roundcube setup
2117
2118 # * nextcloud setup
2119
2120 if [[ $HOSTNAME == bk ]]; then
2121   # from install checker, nextcloud/settings/admin/overview and
2122   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2123   # curl from the web installer requirement, but i switched to cli
2124   # it recommends php-file info, but that is part of php7.3-common, already got installed
2125   # with roundcube.
2126   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2127
2128   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2129   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2130 [www]
2131 clear_env = no
2132 EOF
2133
2134   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2135     domain=${bkdomains[i]}
2136     ncdir=${ncdirs[i]}
2137     ncbase=${ncdir##*/}
2138     m cd /var/www
2139     if [[ ! -e $ncdir/index.php ]]; then
2140       # if we wanted to only install a specific version, use something like
2141       # file=latest-22.zip
2142       file=latest.zip
2143       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2144       m rm -rf nextcloud
2145       m unzip -q $file
2146       m rm -f $file
2147       m chown -R www-data.www-data nextcloud
2148       m mv nextcloud $ncdir
2149       m cd $ncdir
2150       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2151     fi
2152     # note, strange this happend where updater did not increment the version var,
2153     # mine was stuck on 20. I manually updated it.
2154     m cd $ncdir/config
2155     if [[ ! -e config.php-orig ]]; then
2156       m cp -a config.php config.php-orig
2157     fi
2158     cat config.php-orig - >tmp.php <<EOF
2159 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2160 \$CONFIG["mail_smtpmode"] = "sendmail";
2161 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2162 \$CONFIG["mail_smtpport"] = 25;
2163 \$CONFIG["mail_smtptimeout"] = 10;
2164 \$CONFIG["mail_smtpsecure"] = "";
2165 \$CONFIG["mail_smtpauth"] = false;
2166 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2167 \$CONFIG["mail_smtpname"] = "";
2168 \$CONFIG["mail_smtppassword"] = "";
2169 \$CONFIG["mail_domain"] = "$domain";
2170
2171 # https://github.com/nextcloud/user_external#readme
2172 # plus mailinabox example
2173 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2174
2175
2176 # based on installer check
2177 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2178 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2179
2180 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2181 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2182 \$CONFIG['trusted_domains'] = array (
2183         0 => '$domain',
2184     );
2185 #\$CONFIG[''] = '';
2186 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2187 var_export(\$CONFIG);
2188 fwrite(STDOUT, ";\n");
2189 EOF
2190     m php tmp.php >config.php
2191     m rm tmp.php
2192     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2193     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2194     # user_external not compaible with nc 23
2195     for app in contacts calendar; do
2196       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2197         m sudo -u www-data php $ncdir/occ app:install $app
2198       fi
2199     done
2200     i /etc/systemd/system/$ncbase.service <<EOF
2201 [Unit]
2202 Description=ncup $ncbase
2203 After=multi-user.target
2204
2205 [Service]
2206 Type=oneshot
2207 ExecStart=/usr/local/bin/ncup $ncbase
2208 User=www-data
2209 IOSchedulingClass=idle
2210 CPUSchedulingPolicy=idle
2211 EOF
2212     i /etc/systemd/system/$ncbase.timer <<EOF
2213 [Unit]
2214 Description=ncup $ncbase timer
2215
2216 [Timer]
2217 OnCalendar=Daily
2218
2219 [Install]
2220 WantedBy=timers.target
2221 EOF
2222     systemctl enable --now $ncbase.timer
2223     i /usr/local/bin/ncup <<'EOFOUTER'
2224 #!/bin/bash
2225 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2226 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2227 set -eE -o pipefail
2228 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2229
2230 ncbase=$1
2231 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2232   echo failed nextcloud update for $ncbase >&2
2233   /sbin/exim -t <<EOF
2234 To: alerts@iankelling.org
2235 From: root@$(hostname -f)
2236 Subject: failed nextcloud update for $ncbase
2237
2238 For logs, run: jr -u $ncbase
2239 EOF
2240 fi
2241 EOFOUTER
2242
2243     mkdir -p /var/www/cron-errors
2244     chown www-data.www-data /var/www/cron-errors
2245     i /etc/cron.d/$ncbase <<EOF
2246 PATH=/sbin:/usr/sbin:/usr/bin:/bin:/usr/local/bin
2247 SHELL=/bin/bash
2248 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2249 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2250 EOF
2251
2252   done
2253 fi
2254
2255
2256 # * exim host conditional config
2257
2258 # ** exim certs
2259
2260 all_dirs=(/p/c/filesystem)
2261 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2262   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2263 done
2264 files=()
2265 for d in ${all_dirs[@]}; do
2266   f=$d/etc/exim4/passwd
2267   if [[ -e $f  ]]; then
2268     files+=($f)
2269   fi
2270   tmp=($d/etc/exim4/*.pem)
2271   if (( ${#tmp[@]} )); then
2272     files+=(${tmp[@]})
2273   fi
2274 done
2275
2276 if (( ${#files[@]} )); then
2277   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2278 fi
2279
2280
2281 # ** exim: auth
2282
2283 case $HOSTNAME in
2284   bk|je)
2285     # avoid accepting mail for invalid users
2286     # https://wiki.dovecot.org/LMTP/Exim
2287     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2288 deny
2289   message = invalid recipient
2290   domains = +local_domains
2291   !verify = recipient/callout=no_cache
2292 EOF
2293     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2294 dovecot_plain:
2295   driver = dovecot
2296   public_name = PLAIN
2297   server_socket = /var/run/dovecot/auth-client
2298   server_set_id = $auth1
2299 EOF
2300     ;;
2301 esac
2302 if $bhost_t; then
2303   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2304 # from 30_exim4-config_examples
2305 plain_server:
2306 driver = plaintext
2307 public_name = PLAIN
2308 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2309 server_set_id = $auth2
2310 server_prompts = :
2311 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2312 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2313 .endif
2314 EOF
2315 fi
2316
2317 # ** exim: main daemon use non-default config file
2318 case $HOSTNAME in
2319   bk|$MAIL_HOST)
2320     # to see the default comments in /etc/default/exim4:
2321     # s update-exim4defaults --force --init
2322     # which will overwrite any existing file
2323     i /etc/default/exim4 <<'EOF'
2324 QUEUERUNNER='combined'
2325 QUEUEINTERVAL='30m'
2326 COMMONOPTIONS='-C /etc/exim4/my.conf'
2327 UPEX4OPTS='-o /etc/exim4/my.conf'
2328 #E4BCD_PANICLOG_NOISE='exim user lost privilege for using -C option'
2329 EOF
2330     chown Debian-exim:Debian-exim /usr/sbin/exim4
2331     # needs guid set in order to become Debian-exim
2332     chmod g+s,u+s /usr/sbin/exim4
2333     i /etc/exim4/trusted_configs <<'EOF'
2334 /etc/exim4/my.conf
2335 EOF
2336     ;;
2337   *)
2338     # default file
2339     i /etc/default/exim4 <<'EOF'
2340 QUEUERUNNER='combined'
2341 QUEUEINTERVAL='30m'
2342 EOF
2343     ;;
2344 esac
2345
2346 # ** exim non-root
2347
2348 case $HOSTNAME in
2349   bk|je|li)
2350     # no reason to expect it to ever be there.
2351     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2352     ;;
2353   *)
2354     i /etc/systemd/system/exim4.service.d/nonroot.conf <<'EOF'
2355 [Service]
2356 # see 56.2 Root privilege in exim spec
2357 AmbientCapabilities=CAP_NET_BIND_SERVICE
2358 EOF
2359     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2360 # see 56.2 Root privilege in exim spec
2361 deliver_drop_privilege = true
2362 EOF
2363     # Note: there are other routers that would also fail due to not running as root,
2364     # but afaik, the main router will catch all mail. If not, we will see
2365     # something in the queue.
2366     rm -fv /etc/exim4/conf.d/router/600_exim4-config_userforward
2367     ;;
2368 esac
2369
2370 case $HOSTNAME in
2371
2372   # ** $MAIL_HOST|bk|je)
2373   $MAIL_HOST|bk|je)
2374
2375     echo|i /etc/exim4/conf.d/router/870_backup_local
2376
2377     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2378 # note: some things we don't set that are here by default because they are unused.
2379 dc_local_interfaces=''
2380 dc_eximconfig_configtype='internet'
2381 dc_localdelivery='dovecot_lmtp'
2382 EOF
2383     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2384 # recommended if dns is expected to work
2385 CHECK_RCPT_VERIFY_SENDER = true
2386 # default config comment says: If you enable this, you might reject legitimate mail,
2387 # but eggs has had this a long time, so that seems unlikely.
2388 CHECK_RCPT_SPF = true
2389 CHECK_RCPT_REVERSE_DNS = true
2390 CHECK_MAIL_HELO_ISSUED = true
2391
2392 # enable 587 in addition to the default 25, so that
2393 # i can send mail where port 25 is firewalled by isp
2394 daemon_smtp_ports = 25 : 587
2395 # default of 25, can get stuck when catching up on mail
2396 smtp_accept_max = 400
2397 smtp_accept_reserve = 100
2398 smtp_reserve_hosts = +iank_trusted
2399
2400 # options exim has to avoid having to alter the default config files
2401 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2402 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2403 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2404 # testing dmarc
2405 #dmarc_tld_file = /etc/public_suffix_list.dat
2406 EOF
2407     ;;&
2408
2409   # ** $MAIL_HOST|bk)
2410   $MAIL_HOST|bk)
2411
2412     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2413 # je.b8.nz will run out of memory with freshclam
2414 av_scanner = clamd:/var/run/clamav/clamd.ctl
2415 EOF
2416
2417     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2418 deny
2419   malware = */defer_ok
2420   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2421   message = This message was detected as possible malware ($malware_name).
2422 EOF
2423
2424     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2425 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2426 # smarthost config type, not sure.
2427 # failing message on mail-tester.com:
2428 # We check if there is a server (A Record) behind your hostname kd.
2429 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2430 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2431 # and this one seemed appropriate from grepping config.
2432 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2433 # mail to kd, so this should basically be a name that no host has as their
2434 # canonical hostname since the actual host sits behind a nat and changes.
2435 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2436 # I used this to avoid sender verification, didnt work but it still
2437 # makes sense based on the spec.
2438 hosts_treat_as_local = defaultnn.b8.nz
2439
2440 # Outside nn, we get the default cert location from a debian macro,
2441 # and the cert file is put in place by a certbot hook.
2442 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2443 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2444 EOF
2445
2446     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2447 gnusmarthost:
2448   debug_print = "R: smarthost for $local_part@$domain"
2449   driver = manualroute
2450   domains = ! +local_domains
2451 # send most mail through eggs, helps fsfs sender reputation.
2452 # uncomment and optionally move to 188 file to send through my own servers again
2453   senders = *@gnu.org
2454   transport = smarthost_dkim
2455   route_list = * fencepost.gnu.org::587 byname
2456   host_find_failed = ignore
2457   same_domain_copy_routing = yes
2458   no_more
2459 EOF
2460
2461     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2462 10.173.8.1 defaultnn.b8.nz
2463 EOF
2464     ;;&
2465   # ** $MAIL_HOST)
2466   $MAIL_HOST)
2467
2468     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2469 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2470 # use vpn transport. lower priority so it overrides the default route.
2471 # Use this in case our vpn fails, we dont send anything without it.
2472 .ifdef DCconfig_internet
2473 dnslookup_vpn:
2474   debug_print = "R: dnslookup for $local_part@$domain"
2475   driver = dnslookup
2476   domains = ! +local_domains
2477   transport = remote_smtp_vpn
2478   same_domain_copy_routing = yes
2479   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
2480   no_more
2481 .endif
2482 EOF
2483
2484
2485     # note on backups: I used to do an automatic sshfs and restricted
2486     # permissions to a specific directory on the remote server, /bu/mnt,
2487     # which required using a dedicated user, but realized smtp will be
2488     # more reliable and less fuss. If I ever need that again, see the
2489     # history of this file, and bum in brc2.
2490
2491     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2492 ### router/900_exim4-config_local_user
2493 #################################
2494
2495 # todo, it would be nice to save sent email too,
2496 # but its not so important, they still exist in my head
2497
2498 backup_redir:
2499 driver = redirect
2500 domains = +local_domains
2501 # b is just an arbirary short string
2502 data = b@eximbackup.b8.nz
2503 # note, to test this, i could temporarily allow testignore.
2504 # alerts avoids potential mail loop. root is already
2505 # redirected earlier, so that is just being overly cautious.
2506 local_parts = ! root : ! testignore : ! alerts
2507 unseen = true
2508
2509 backup_copy:
2510 driver = manualroute
2511 domains = eximbackup.b8.nz
2512 transport = backup_remote
2513 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2514 # note changes here also require change in passwd.client
2515 route_list = * eximbackup.b8.nz
2516 same_domain_copy_routing = yes
2517 errors_to = alerts@iankelling.org
2518 no_more
2519 EOF
2520
2521
2522     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2523 backup_remote:
2524   driver = smtp
2525   multi_domain
2526 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2527   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2528 .endif
2529   hosts_require_auth = *
2530   hosts_try_auth = *
2531   envelope_to_add
2532   # manual return path because we want it to be the envelope sender
2533   # we got not the one we are using in this smtp transport
2534   headers_add = "Return-path: $sender_address"
2535 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2536   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2537 .endif
2538 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2539   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2540 .endif
2541 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2542   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2543 .endif
2544 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2545   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2546 .endif
2547 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2548   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2549 .endif
2550 .ifdef REMOTE_SMTP_HELO_DATA
2551   helo_data=REMOTE_SMTP_HELO_DATA
2552 .endif
2553 .ifdef TLS_DH_MIN_BITS
2554 tls_dh_min_bits = TLS_DH_MIN_BITS
2555 .endif
2556 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2557 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2558 .endif
2559 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2560 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2561 .endif
2562 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2563   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2564 .endif
2565 EOF
2566
2567
2568     # this avoids some error. i cant remember what. todo:
2569     # test it out and document why/if its needed.
2570     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2571     # mail.fsf.org
2572     # *.posteo.de
2573     # EOF
2574
2575     # cron email from smarthost hosts will automatically be to
2576     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2577     # case that doesn't work, we still want to accept that mail, but not
2578     # from any host except the smarthosts. local_hostnames and this rule
2579     # is for that purpose.
2580     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2581 deny
2582   !authenticated = *
2583   domains = +local_hostnames
2584   message = no relay
2585 EOF
2586     echo|i /etc/exim4/conf.d/router/880_universal_forward
2587
2588     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2589     # and also have mail.iankelling.org whitelisted as a relay domain.
2590     # I could avoid that if I changed this to submit to 587 with a
2591     # password like a standard mua.
2592     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2593 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2594 # replaced DCsmarthost with hostname
2595 fsfsmarthost:
2596   debug_print = "R: smarthost for $local_part@$domain"
2597   driver = manualroute
2598   domains = ! +local_domains
2599   senders = *@fsf.org
2600   transport = remote_smtp_smarthost
2601   route_list = * mail.fsf.org::587 byname
2602   host_find_failed = ignore
2603   same_domain_copy_routing = yes
2604   no_more
2605
2606 posteosmarthost:
2607   debug_print = "R: smarthost for $local_part@$domain"
2608   driver = manualroute
2609   domains = ! +local_domains
2610   senders = *@posteo.net
2611   transport = remote_smtp_smarthost
2612   route_list = * posteo.de::587 byname
2613   host_find_failed = ignore
2614   same_domain_copy_routing = yes
2615   no_more
2616
2617 EOF
2618
2619     # Greping /etc/exim4, unqualified mails this would end up as
2620     # a return path, so it should go somewhere we will see.
2621     # The debconf output about mailname is as follows:
2622     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2623     # name.
2624     # This name will also be used by other programs. It should be the single, fully
2625     # qualified domain name (FQDN).
2626     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2627     # this option would be example.org.
2628     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2629     echo iankelling.org > /etc/mailname
2630
2631
2632     # mail.iankelling.org so local imap clients can connect with tls and
2633     # when they happen to not be local.
2634     # todo: this should be 10.8.0.4
2635
2636     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2637 # note: i put nn.b8.nz into bind for good measure
2638 10.173.8.2 nn.b8.nz mx.iankelling.org
2639 EOF
2640
2641     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2642     # weve configured this file in dnsmasq if we are using it.
2643     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2644 server=/mx.iankelling.org/127.0.1.1
2645 EOF
2646     # I used to use debconf-set-selections + dpkg-reconfigure,
2647     # which then updates this file
2648     # but the process is slower than updating it directly and then I want to set other things in
2649     # update-exim4.conf.conf, so there's no point.
2650     # The file is documented in man update-exim4.conf,
2651     # except the man page is not perfect, read the bash script to be sure about things.
2652
2653     # The debconf questions output is additional documentation that is not
2654     # easily accessible, but super long, along with the initial default comment in this
2655     # file, so I've saved that into ./mail-notes.conf.
2656     #
2657     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2658     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2659 # man page: is used to build the local_domains list, together with "localhost"
2660 # this is duplicated in a later router.
2661 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2662 EOF
2663
2664
2665     # dmarc. not used currently
2666     f=/etc/cron.daily/refresh-dmarc-tld-file
2667     cat >$f <<'EOF'
2668 #!/bin/bash
2669 cd /etc
2670 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2671 EOF
2672     m chmod 755 $f
2673
2674     ;;
2675   # ** bk
2676   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2677   bk)
2678
2679     echo|i /etc/exim4/conf.d/rcpt_local_acl
2680     echo|i /etc/exim4/conf.d/router/880_universal_forward
2681
2682     echo amnimal.ninja > /etc/mailname
2683
2684     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2685 10.173.8.2 nn.b8.nz
2686 EOF
2687
2688     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2689 s,/etc/default/exim4,/etc/default/exim4in,g
2690 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2691 s,(^[ #]*Provides:).*,\1 exim4in,
2692 s,(^[ #]*NAME=).*,\1"exim4in",
2693 EOF
2694     chmod +x /etc/init.d/exim4in
2695     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2696 [Unit]
2697 # needed to continually restart
2698 StartLimitIntervalSec=0
2699
2700 [Service]
2701 Restart=always
2702 # time to sleep before restarting a service
2703 RestartSec=20
2704 EOF
2705
2706     i /etc/default/exim4in <<'EOF'
2707 # defaults but no queue runner and alternate config dir
2708 QUEUERUNNER='no'
2709 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2710 UPEX4OPTS='-d /etc/myexim4'
2711 EOF
2712
2713     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2714 # man page: is used to build the local_domains list, together with "localhost"
2715 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com'
2716 EOF
2717
2718     ;;
2719   # ** je
2720   je)
2721     echo je.b8.nz > /etc/mailname
2722     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2723 dc_other_hostnames='je.b8.nz'
2724 EOF
2725     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2726     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2727     echo|i /etc/exim4/conf.d/rcpt_local_acl
2728     echo|i /etc/exim4/conf.d/router/880_universal_forward
2729     ;;
2730   # ** not MAIL_HOST|bk|je
2731   *)
2732     # this one should be removed for all non mail hosts, but
2733     # bk and je never become mail_host
2734     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2735
2736     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2737     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2738     echo|i /etc/exim4/conf.d/rcpt_local_acl
2739     echo|i /etc/exim4/conf.d/router/890_backup_copy
2740     echo|i /etc/exim4/conf.d/main/000_local-nn
2741
2742
2743     if $bhost_t; then
2744       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2745 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2746 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2747 # so we can maintiain the originals of the backups.
2748 # we wouldnt want this if we were dealing with any other
2749 # local deliveries, but we sent all others to the smarthost
2750 # which then strips the headers.
2751 envelope_to_remove = false
2752 return_path_remove = false
2753 EOF
2754     fi
2755
2756     # catches things like cronjob email
2757     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2758 universal_forward:
2759   driver = redirect
2760   domains = +local_domains
2761   data = alerts@iankelling.org
2762 EOF
2763
2764
2765     for unit in ${nn_progs[@]}; do
2766       f=/etc/systemd/system/$unit.service.d/nn.conf
2767       rm -fv $f
2768     done
2769
2770     # dont i dont care if defaultnn section gets left, it wont
2771     # get used.
2772     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2773     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2774
2775
2776     if $bhost_t; then
2777       install -d /bu
2778       install -d -g $u -o $u -m 771 /bu/md
2779       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2780 # modified debian maildir transport
2781 backup_maildir:
2782   driver = appendfile
2783   directory = /bu/md
2784   delivery_date_add
2785   # note, no return path or envelope added
2786   maildir_format
2787   directory_mode = 0700
2788   mode = 0644
2789   mode_fail_narrower = false
2790   user = $u
2791 EOF
2792
2793       i /etc/exim4/conf.d/router/870_backup_local <<EOF
2794 ### router/900_exim4-config_local_user
2795 #################################
2796
2797 backup_local:
2798   debug_print = "R: local_user for \$local_part@\$domain"
2799   driver = accept
2800   domains = eximbackup.b8.nz
2801   transport = backup_maildir
2802 EOF
2803
2804       # Bind to wghole to receive mailbackup.
2805       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2806       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2807 dc_other_hostnames='eximbackup.b8.nz'
2808 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2809 EOF
2810
2811       # wghole & thus exim will fail to start without internet connectivity.
2812       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2813 [Unit]
2814 StartLimitIntervalSec=0
2815
2816 [Service]
2817 Restart=always
2818 RestartSec=20
2819 EOF
2820
2821     else
2822       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2823 # Note: If theres like a temporary problem where mail gets sent to
2824 # one of these hosts, if exim isnt listening, it will be a temporary error
2825 # instead of a permanent 5xx.
2826 dc_local_interfaces='127.0.0.1;::1'
2827 EOF
2828       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2829     fi
2830     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2831 dc_eximconfig_configtype='smarthost'
2832 dc_smarthost='$smarthost'
2833 EOF
2834
2835     hostname -f |i /etc/mailname
2836     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2837 # The manpage incorrectly states this will do header rewriting, but
2838 # that only happens if we have dc_hide_mailname is set.
2839 dc_readhost='iankelling.org'
2840 # Only used in case of bounces.
2841 dc_localdelivery='maildir_home'
2842 EOF
2843     ;;
2844 esac
2845
2846
2847
2848
2849 # ** $MAILHOST|bk, things that belong at the end
2850 case $HOSTNAME in
2851   $MAIL_HOST|bk)
2852     # config for the non-nn exim
2853     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2854     # If we ever wanted to have a separate spool,
2855     # we could do it like this.
2856     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
2857     # spool_directory = /var/spool/myexim4
2858     # EOF
2859     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
2860 dc_eximconfig_configtype='smarthost'
2861 dc_smarthost='nn.b8.nz'
2862 EOF
2863     ;;&
2864   bk)
2865
2866     # config for the non-nn exim
2867     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2868 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
2869 EOF
2870     ;;
2871   $MAIL_HOST)
2872     # for bk, we have a exim4in.service that will do this for us.
2873     m update-exim4.conf -d /etc/myexim4
2874     ;;
2875 esac
2876
2877 # * spool dir setup
2878
2879 # ** bind mount setup
2880 # put spool dir in directory that spans multiple distros.
2881 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
2882 #
2883 dir=/nocow/exim4
2884 sdir=/var/spool/exim4
2885 # we only do this if our system has $dir
2886
2887 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
2888 # about 2 seconds later, exim starts, and immediately puts into paniclog:
2889 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
2890 # so, im trying a bind mount to get rid of that.
2891 if [[ -e /nocow ]]; then
2892   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
2893     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
2894   fi
2895   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
2896 [Unit]
2897 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
2898 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
2899 After=local-fs.target
2900 EOF
2901   if ! mountpoint -q $sdir; then
2902     stopifactive exim4 exim4in
2903     if [[ -L $sdir ]]; then
2904       m rm $sdir
2905     fi
2906     if [[ ! -e $dir && -d $sdir ]]; then
2907       m mv $sdir $dir
2908     fi
2909     if [[ ! -d $sdir ]]; then
2910       m mkdir $sdir
2911       m chmod 000 $sdir # only want it to be used when its mounted
2912     fi
2913     m mount $sdir
2914   fi
2915 fi
2916
2917
2918
2919 # ** exim/spool uid setup
2920 # i have the spool directory be common to distro multi-boot, so
2921 # we need the uid to be the same. 608 cuz it's kind of in the middle
2922 # of the free system uids.
2923 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
2924 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
2925 if [[ ! $uid ]]; then
2926   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
2927   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
2928     --no-create-home --disabled-login --force-badname Debian-exim
2929 elif [[ $uid != 608 ]]; then
2930   stopifactive exim4 exim4in
2931   m usermod -u 608 Debian-exim
2932   m groupmod -g 608 Debian-exim
2933   m usermod -g 608 Debian-exim
2934   m find / /nocow -path ./var/tmp -prune -o -xdev -uid $uid -execdir chown -h 608 {} +
2935   m find / /nocow -path ./var/tmp -prune -o -xdev -gid $gid -execdir chgrp -h 608 {} +
2936 fi
2937
2938 # * start / stop services
2939
2940 reifactive dnsmasq nscd
2941
2942 if $reload; then
2943   m systemctl daemon-reload
2944 fi
2945
2946 m systemctl --now enable epanicclean.timer
2947
2948 case $HOSTNAME in
2949   je)
2950     /a/exe/web-conf apache2 je.b8.nz
2951     ;;
2952   bk)
2953     /a/exe/web-conf apache2 mail2.iankelling.org
2954     ;;
2955 esac
2956
2957 m /a/bin/ds/mail-cert-cron -1
2958 sre mailcert.timer
2959
2960 case $HOSTNAME in
2961   bk)
2962     # todo, this should be done in distro-begin
2963     soff systemd-resolved
2964     ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf
2965     ;;&
2966   $MAIL_HOST|bk)
2967     m systemctl --now enable mailnn mailnnroute
2968     ;;&
2969   $MAIL_HOST)
2970     # we use dns to start wg
2971     if $reload; then
2972       sre unbound
2973     else
2974       m systemctl --now enable unbound
2975     fi
2976     ;;&
2977   $MAIL_HOST|bk)
2978     # If these have changes, id rather manually restart it, id rather
2979     # not restart and cause temporary errors
2980     if $reload; then
2981       sre $vpnser
2982     else
2983       m systemctl --now enable $vpnser
2984     fi
2985     if ! systemctl is-active clamav-daemon >/dev/null; then
2986       m systemctl --now enable clamav-daemon
2987       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.{timer,service} /etc/systemd/system)
2988       if [[ $out ]]; then
2989         reload=true
2990       fi
2991
2992       # note, this will cause paniclog entries because it takes like 45
2993       # seconds for clamav to start, i use ./epanic-clean to remove
2994       # them.
2995     fi
2996     ;;&
2997   $MAIL_HOST|bk|je)
2998     # start spamassassin/dovecot before exim.
2999     sre dovecot spamassassin
3000     # need to wait a bit before restarting exim, else I
3001     # get a paniclog entry like: spam acl condition: all spamd servers failed
3002     sleep 3
3003     m systemctl --now enable mailclean.timer
3004     ;;&
3005   $MAIL_HOST)
3006     # < 2.1 (eg: in t9), uses a different data format which required manual
3007     # migration. dont start if we are running an old version.
3008     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
3009       m systemctl --now enable radicale
3010     fi
3011     ;;&
3012 esac
3013
3014 # last use of $reload happens in previous block
3015 rm -f /var/local/mail-setup-reload
3016
3017
3018 case $HOSTNAME in
3019   $MAIL_HOST|bk|je) : ;;
3020   *)
3021     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3022     ;;
3023 esac
3024
3025 sre exim4
3026
3027 case $HOSTNAME in
3028   $MAIL_HOST)
3029     m systemctl --now enable mailbindwatchdog
3030     ;;
3031   *)
3032     soff mailbindwatchdog
3033     ;;
3034 esac
3035
3036
3037 case $HOSTNAME in
3038   bk) sre exim4in ;;
3039 esac
3040
3041 # * mail monitoring / testing
3042
3043 # note, to test clamav, send an email with body that only contains
3044 # https://en.wikipedia.org/wiki/EICAR_test_file
3045 # which set malware_name to Eicar-Signature
3046 case $HOSTNAME in
3047   $MAIL_HOST|bk|je)
3048     # note: cronjob "ian" also does some important monitoring
3049     # todo: this will sometimes cause an alert because mailtest-check will run
3050     # before we have setup network namespace and spamassassin
3051     cat >/etc/cron.d/mailtest <<EOF
3052 SHELL=/bin/bash
3053 PATH=/usr/bin:/bin:/usr/local/bin
3054 MAILTO=alerts@iankelling.org
3055 */5 * * * *   $u send-test-forward |& log-once send-test-forward
3056 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3057 # im seeing some intermittent failures on the slow check, do it all the time
3058 # for now. It looks like a dns failure.
3059 #5-59/5 * * * *   root mailtest-check |& log-once -1 mailtest-check
3060 #0 * * * *   root mailtest-check slow |& log-once -1 mailtest-slow
3061 */5 * * * *   root timeout 290 mailtest-check slow |& log-once -12 mailtest-check
3062 EOF
3063     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3064       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3065     ;;&
3066   $MAIL_HOST)
3067     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3068     test_to="testignore@expertpathologyreview.com, testignore@je.b8.nz, testignore@amnimal.ninja, jtuttle@gnu.org"
3069
3070     cat >>/etc/cron.d/mailtest <<EOF
3071 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3072 EOF
3073     ;;&
3074   bk)
3075     test_froms=(testignore@expertpathologyreview.com testignore@amnimal.ninja)
3076     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@je.b8.nz"
3077     ;;&
3078   je)
3079     test_froms=(testignore@je.b8.nz)
3080     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@expertpathologyreview.com, testignore@amnimal.ninja"
3081     ;;&
3082   $MAIL_HOST|bk|je)
3083     cat >/usr/local/bin/send-test-forward <<'EOF'
3084 #!/bin/bash
3085 olds=(
3086 $(/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3087 )
3088 if (( ${#olds[@]} )); then
3089   /sbin/exim -Mrm "${olds[@]}" >/dev/null
3090 fi
3091 EOF
3092     for test_from in ${test_froms[@]}; do
3093       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3094 /usr/sbin/exim -f $test_from -t <<EOF
3095 From: $test_from
3096 To: $test_to
3097 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$(date +%s)
3098
3099 /usr/local/bin/send-test-forward
3100 EOF
3101 EOFOUTER
3102     done
3103     m chmod +x /usr/local/bin/send-test-forward
3104     ;;
3105   *)
3106     rm -fv /etc/cron.d/mailtest
3107     ;;
3108 esac
3109
3110
3111
3112 # * misc
3113 m sudo -u $u mkdir -p /home/$u/.cache
3114 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3115 while (($#)); do
3116   target=$1
3117   f=$2
3118   shift 2
3119   if [[ ! -L $f ]]; then
3120     if [[ -e $f ]]; then
3121       rm -rf $f
3122     fi
3123     m sudo -u $u ln -sf -T $target $f
3124   fi
3125 done
3126
3127
3128 # /etc/alias setup is debian specific, and exim postinst script sets up
3129 # an /etc/alias from root to the postmaster, based on the question
3130 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3131 # root, or there was no preexisting aliases file. postfix won\'t set up
3132 # a root to $postmaster alias if it\'s already installed. Easiest to
3133 # just set it ourselves.
3134
3135 # debconf question for postmaster:
3136 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3137 # to the user account of the actual system administrator.
3138 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3139 # recommended.
3140 # Note that postmaster\'s mail should be read on the system to which it is directed,
3141 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3142 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3143 # force local delivery.
3144 # Multiple user names need to be separated by spaces.
3145 # Root and postmaster mail recipient:
3146
3147 m exit 0
3148 :
3149
3150 # Local Variables:
3151 # eval: (outline-minor-mode)
3152 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3153 # End:
3154 # this is combined with defining outline-level in init.el