iankelling.org Git - distro-setup/blob - mail-setup

   1 #!/bin/bash
   2 # * intro
   3 # Copyright (C) 2019 Ian Kelling
   4 # SPDX-License-Identifier: AGPL-3.0-or-later
   5
   6 # todo: max line length macro changed in t11. look into it
   7 # todo: check that all macros we use are still valid in t11
   8
   9 # todo: setup an alert for bouncing test emails.
  10
  11 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  12 # think about making bounces go from the original address.
  13
  14 # todo: add a prometheus alert for dovecot.
  15
  16 # todo: handle errors like this:
  17 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  18 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  19 #eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago
  20 #Debian-+  1954     1  0 36231 11560   4 Apr02 ?        00:40:25 /usr/sbin/exim4 -bd -q30m
  21 #Debian-+ 23058  1954  0 36821 10564   0 20:38 ?        00:00:00 /usr/sbin/exim4 -bd -q30m
  22
  23 #  todo: harden dovecot. need to do some research. one way is for it to only listen on a wireguard vpn interface, so only clients that are on the vpn can access it.
  24 #  todo: consider hardening cups listening on 0.0.0.0
  25 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  26
  27 # todo:  hosts should only allow external mail that is authed and
  28 # destined for backup route. it is a minor issue since traffic is
  29 # limited to the wghole network.
  30
  31 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  32 # instead of a simple rejection like it should.
  33
  34 # todo: run mailping test after running, or otherwise
  35 # clear out terminal alert
  36
  37 # todo: disable postgrey
  38
  39 # todo: in testforward-check, we should also look
  40
  41 # todo: test that bounces dont help create valid mailtest-check
  42
  43 # todo: move mail stuff in distro-end into this file
  44
  45 # todo: consider rotating dkim & publishing key so every past email I sent
  46 # isnt necessarily signed
  47
  48 # todo: consider how to get clamav out of Debian-exim group
  49 # so it cant read/write the whole mail spool, for better
  50 # security.
  51
  52 # todo: create a cronjob to update or warn on expiring dnssec keys
  53
  54 # todo: we should test failed mail daily or so
  55 # failed cronjob, failed sysd-log-once,
  56 # a local bounce from a cronjob, a local bounce
  57 # to a bad remote address, perhaps a local failure
  58 # when the sending daemon is down.
  59 # And send an alert email if no alerts have been sent
  60 # in 2 or 3 days or something. todo, test cron mail on li.
  61
  62 # todo: look at mailinabox extra dns records, note these changelogs:
  63 # - An MTA-STS policy for incoming mail is now published (in DNS and over HTTPS) when the primary hostname and email address domain both have a signed TLS certificate installed, allowing senders to know that an encrypted connection should be enforced.
  64 # - The per-IP connection limit to the IMAP server has been doubled to allow more devices to connect at once, especially with multiple users behind a NAT.
  65 #
  66
  67 # todo: mailtest-check failure on remote hosts is not going to alert me.
  68 # sort that out.
  69 # todo: test mail failure as well as success.
  70 #
  71 # todo: validate that mailtest-check is doing dnsbl checks.
  72
  73 # background: I want to run exim in a network namespace so it can send
  74 # and receive through a vpn. This is needed so it can do ipv6, because
  75 # outside the namespace if we dont have ipv6, to send ipv6 through the
  76 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  77 # long time, it was fine, but it causes various pains, like increased
  78 # latency, increased recaptcha because my ip is from a data center, just
  79 # various issues I dont want on all the time. The problem with the
  80 # namespace is that all kinds of programs want to invoke exim, but they
  81 # wont be in the namespace. I could replace exim with a wrapper that
  82 # jumps into the namespace, i tried that, it works fine.  One remaining
  83 # problem was that I would have needed to hook into exim upgrades to
  84 # move exim and replace it with my wrapper script. Also, my script to
  85 # join the namespace is not super reliable because it uses a pgrep.
  86 # Instead, I should have created a systemd service for a process that
  87 # will never die and just writes its pid somewhere convenient.
  88 # That implementation
  89 # is below here:
  90 #
  91 # sudoers:
  92 # user ALL=(ALL) /usr/sbin/exim4
  93 #
  94 # move exim4 to eximian, use this script for exim4:
  95 #
  96 # #!/bin/bash
  97 # if ip a show veth1-mail &>/dev/null; then
  98 #   /usr/sbin/eximian "$@"
  99 #   exit
 100 # fi
 101 # dosudo=false
 102 # if [[ $USER && $USER != root ]]; then
 103 #   dosudo=true
 104 # fi
 105 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 106 # if $dosudo; then
 107 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 108 # else
 109 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 110 # fi
 111 # ## end script
 112 #
 113 # an alternate solution: there is a small setguid program for
 114 # network namespaces in my bookmarks.
 115 #
 116 # However, the solution I went with is: have 2 exim
 117 # configs. A nonstandard location for the daemon that runs
 118 # in the namespace. For all other invocations, it uses
 119 # the default config location, which is altered to be
 120 # in a smarthost config which sends mail to the deaemon.
 121 #
 122 # I have a bash function, enn to invoke exim like the daemon is running.
 123 # and mailbash to just enter its network namespace.
 124
 125 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 126
 127 shopt -s nullglob
 128
 129 if [[ -s /usr/local/lib/err ]]; then
 130   source /usr/local/lib/err
 131 elif [[ -s /a/bin/errhandle/err ]]; then
 132   source /a/bin/errhandle/err
 133 else
 134   err "no err tracing script found"
 135 fi
 136 source /a/bin/distro-functions/src/identify-distros
 137 source /a/bin/distro-functions/src/package-manager-abstractions
 138
 139 # has nextcloud_admin_pass in it
 140 f=/p/c/machine_specific/$HOSTNAME/mail
 141 if [[ -e $f ]]; then
 142   # shellcheck source=/p/c/machine_specific/bk/mail
 143   source $f
 144 fi
 145
 146
 147 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 148
 149 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 150 u=$(id -nu 1000)
 151
 152
 153 usage() {
 154   cat <<EOF
 155 Usage: ${0##*/} anything_here_to_debug
 156 Setup exim4 & dovecot & related things
 157
 158 -h|--help  Print help and exit.
 159 EOF
 160   exit $1
 161 }
 162
 163 # debug output if we pass any arg
 164 if (( $# )); then
 165   set -x
 166 fi
 167
 168
 169 ####### instructions for icedove #####
 170 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 171 # then click advanced so it accepts it.
 172 # we could also just use 127.0.0.1 with no ssl
 173 #
 174 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 175 # background: dovecot does not yet have ocsp stapling support
 176 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 177 #
 178 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 179 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 180 # fetching mail settings: folder poll frequency 10 minutes.
 181 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 182 #######
 183
 184
 185 # * perstent password instructions
 186 # Note: for cert cron, we need to manually run first to accept known_hosts
 187
 188 # # exim passwords:
 189 # # for hosts which have all private files I just use the same user
 190 # # for other hosts, each one get\'s their own password.
 191 # # for generating secure pass, and storing for server too:
 192 # f=$(mktemp)
 193 # host=tp
 194 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 195 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 196 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 197 # #reference: exim4_passwd_client(5)
 198 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 199 # mkdir -p $dir
 200 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 201 # # then run this script
 202
 203 # # dovecot password, i just need 1 as I\'m the only user
 204 # mkdir /p/c/filesystem/etc/dovecot
 205 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 206
 207 ####### end perstent password instructions ######
 208
 209
 210 # * dkim dns
 211 # # Remove 1 level of comments in this section, set the domain var
 212 # # for the domain you are setting up, then run this and copy dns settings
 213 # # into dns.
 214 # domain=iankelling.org
 215 # c /p/c/filesystem/etc/exim4
 216 # # this has several bugs addressed in comments, but it was helpful
 217 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 218
 219 # openssl genrsa -out $domain-private.pem 2048
 220 # # Then, to get the public key strings to put in bind:
 221
 222 # # selector is needed for having multiple keys for one domain.
 223 # # I dun do that, so just use a static one: li
 224 # # Debadmin page does not have v=, fastmail does, and this
 225 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 226 # # https://www.ietf.org/rfc/rfc6376.txt
 227 # # Join and print all but first and last line.
 228 # # last line: swap hold & pattern, remove newlines, print.
 229 # # lines 2+: append to hold space
 230 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 231 # cat <<EOF
 232 # a._domainkey.$domain  TXT     (
 233 # "v=DKIM1\059 k=rsa\059 p=$(openssl rsa -in $domain-private.pem -pubout |&sed -rn '${x;s/\n//g;s/^(.*)(.{240}$)/\1"\n"\2/p};3,$H')" )
 234 # EOF
 235 # # sed explanation: skip the first few lines, then put them into the hold space, then
 236 # # on the last line, back to the patern space, remove the newlines, then add a newline
 237 # # at the last char - 240, because bind txt records need strings <=255 chars,
 238 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 239 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 240
 241 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 242
 243 # * dmarc dns
 244
 245 # # 2017-02 dmarc policies:
 246 # # host -t txt _dmarc.gmail.com
 247 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 248 # # there were articles claiming gmail would be  changing
 249 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 250 # # expected to cause problems
 251 # # with a few old mailing lists, copying theirs for now.
 252 #
 253 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 254
 255 # * other dns
 256
 257 # # 2017-02 spf policies:
 258 # # host -t txt lists.fedoraproject.org
 259 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 260 # # i include fastmail\'s settings, per their instructions,
 261 # # and follow their policy. In mail in a box, or similar instructions,
 262 # # I\'ve seen recommended to not use a restrictive policy.
 263
 264 # # to check if dns has updated, you do
 265 # host -a mesmtp._domainkey.$domain
 266
 267 # # mx records,
 268 # # setting it to iankelling.org would work the same, but this
 269 # # is more flexible, I could change where mail.iankelling.org pointed.
 270 # cat <<'EOF'
 271 # mx records, 2 records each, for * and empty domain
 272 # pri 10 mail.iankelling.org
 273 # EOF
 274
 275 # # dnssec
 276 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 277
 278 # * functions & constants
 279
 280 pre="${0##*/}:"
 281 m() { printf "$pre %s\n"  "$*"; "$@"; }
 282 e() { printf "$pre %s\n"  "$*"; }
 283 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 284
 285 reload=false
 286 # This file is so if we fail in the middle and rerun, we dont lose state
 287 if [[ -e /var/local/mail-setup-reload ]]; then
 288   reload=true
 289 fi
 290 i() { # install file
 291   local tmp tmpdir dest="$1"
 292   local base="${dest##*/}"
 293   local dir="${dest%/*}"
 294   if [[ $dir != "$base" ]]; then
 295     # dest has a directory component
 296     mkdir -p "$dir"
 297   fi
 298   ir=false # i result
 299   tmpdir=$(mktemp -d)
 300   cat >$tmpdir/"$base"
 301   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 302   if [[ $tmp ]]; then
 303     printf "%s\n" "$tmp"
 304     ir=true
 305     if [[ $dest == /etc/systemd/system/* ]]; then
 306       touch /var/local/mail-setup-reload
 307       reload=true
 308     fi
 309   fi
 310   rm -rf $tmpdir
 311 }
 312 setini() {
 313   key="$1" value="$2" section="$3"
 314   file="/etc/radicale/config"
 315   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 316 }
 317 soff () {
 318   for service; do
 319     # ignore services that dont exist
 320     if systemctl cat $service &>/dev/null; then
 321       m systemctl disable --now $service
 322     fi
 323   done
 324 }
 325 sre() {
 326   for service; do
 327     m systemctl restart $service
 328     m systemctl enable $service;
 329   done
 330 }
 331 mailhost() {
 332   [[ $HOSTNAME == "$MAIL_HOST" ]]
 333 }
 334 e() { printf "%s\n" "$*"; }
 335 reifactive() {
 336   for service; do
 337     if systemctl is-active $service >/dev/null; then
 338       m systemctl restart $service
 339     fi
 340   done
 341 }
 342 stopifactive() {
 343   for service; do
 344     if systemctl is-active $service >/dev/null; then
 345       m systemctl stop $service
 346     fi
 347   done
 348 }
 349
 350 mxhost=mx.iankelling.org
 351 mxport=587
 352
 353 # old setup. left as comment for example
 354 # mxhost=mail.messagingengine.com
 355 # mxport=587
 356 # forward=ian@iankelling.org
 357
 358 smarthost="$mxhost::$mxport"
 359 uhome=$(eval echo ~$u)
 360
 361 # Somehow on one machine, a file got written with 664 perms.
 362 # just being defensive here.
 363 umask 0022
 364
 365 source /a/bin/bash_unpublished/source-state
 366 if [[ ! $MAIL_HOST ]]; then
 367   err "\$MAIL_HOST not set"
 368 fi
 369
 370 bhost_t=false
 371 case $HOSTNAME in
 372   $MAIL_HOST) : ;;
 373   kd|frodo|x2|x3|kw|sy|bo)
 374     bhost_t=true
 375     ;;
 376 esac
 377
 378
 379 # * Install universal packages
 380
 381
 382 # installs epanicclean iptables-exim ip6tables-exim
 383 /a/bin/ds/install-my-scripts
 384
 385 if [[ $(debian-codename-compat) == bionic ]]; then
 386   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 387 Package: spamassassin sa-compile spamc
 388 Pin: release n=focal,o=Ubuntu
 389 Pin-Priority: 500
 390 EOF
 391 fi
 392
 393 # light version of exim does not have sasl auth support.
 394 # note: for bitfolk hosts, unbound has important config with conflink.
 395 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 396
 397 # note: pyzor debian readme says you need to run some initialization command
 398 # but its outdated.
 399 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 400 case $HOSTNAME in
 401   je) : ;;
 402   # not included due to using wireguard: openvpn
 403   *) pi wget git unzip iptables ;;
 404 esac
 405 # bad packages that sometimes get automatically installed
 406 pu openresolv resolvconf
 407
 408 soff openvpn
 409
 410
 411 if [[ $(debian-codename) == etiona ]]; then
 412   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 413   # so running iptables as part of openvpn startup wont work. This should do it.
 414   pi iptables-persistent
 415   cat >/etc/iptables/rules.v6 <<'EOF'
 416 *mangle
 417 COMMIT
 418 *nat
 419 COMMIT
 420 EOF
 421   # load it now.
 422   m ip6tables -S >/dev/null
 423 fi
 424
 425 # our nostart pi fails to avoid enabling
 426
 427
 428 # * Mail clean cronjob
 429
 430 i /etc/systemd/system/mailclean.timer <<'EOF'
 431 [Unit]
 432 Description=Run mailclean daily
 433
 434 [Timer]
 435 OnCalendar=monthly
 436
 437 [Install]
 438 WantedBy=timers.target
 439 EOF
 440
 441 i /etc/systemd/system/mailclean.service <<EOF
 442 [Unit]
 443 Description=Delete and archive old mail files
 444 After=multi-user.target
 445
 446 [Service]
 447 User=$u
 448 Type=oneshot
 449 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 450 EOF
 451
 452 # * postgrey
 453
 454
 455 i /etc/default/postgrey <<'EOF'
 456 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 457 EOF
 458
 459 # * clamav
 460
 461 m usermod -a -G Debian-exim clamav
 462
 463 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 464 [Service]
 465 ExecStartPre=-/bin/mkdir -p /var/run/clamav
 466 ExecStartPre=/bin/chown clamav /var/run/clamav
 467 EOF
 468
 469 # * mail vpn config
 470
 471 # old.
 472 #vpnser=mailvpn.service
 473 # note: this hangs if it cant resolv the endpoint. we
 474 # want it to just retry in the background. i just use a static ip instead.
 475 #
 476 # Note: at least on t10, on reboot, the service fails to come up according to systemd, but
 477 # in reality it is up and working, then it tries to restart infinitely, and fails
 478 # because it detects that the interface exists.
 479 #
 480 # failing output:
 481 #
 482 # Aug 02 21:59:27 sy wg-quick[2092]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 483 # Aug 02 21:59:27 sy wg-quick[2248]: [#] iptables-restore -n
 484 # Aug 02 21:59:27 sy wg-quick[2249]: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
 485 # Aug 02 21:59:27 sy wg-quick[2259]: [#] iptables-restore -n
 486 # Aug 02 21:59:27 sy wg-quick[2260]: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
 487 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=4/NOPERMISSION
 488
 489
 490 # successful output.
 491 # Aug 03 14:12:47 sy wg-quick[711336]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 492 # Aug 03 14:12:47 sy wg-quick[711384]: [#] iptables-restore -n
 493 # Aug 03 14:12:47 sy wg-quick[711336]: [#] ping -w10 -c1 10.8.0.1 ||:
 494 # Aug 03 14:12:47 sy wg-quick[711389]: PING 10.8.0.1 (10.8.0.1) 56(84) bytes of data.
 495 # Aug 03 14:12:47 sy wg-quick[711389]: 64 bytes from 10.8.0.1: icmp_seq=1 ttl=64 time=73.0 ms
 496 # Aug 03 14:12:47 sy wg-quick[711389]: --- 10.8.0.1 ping statistics ---
 497 # Aug 03 14:12:47 sy wg-quick[711389]: 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 498 # Aug 03 14:12:47 sy wg-quick[711389]: rtt min/avg/max/mdev = 72.993/72.993/72.993/0.000 ms
 499 # Aug 03 14:12:47 sy systemd[1]: Finished WireGuard via wg-quick(8) for wgmail.
 500 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 501 # Aug 02 21:59:27 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 502 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Scheduled restart job, restart counter is at 1.
 503 # Aug 02 21:59:47 sy systemd[1]: Stopped WireGuard via wg-quick(8) for wgmail.
 504 # Aug 02 21:59:47 sy systemd[1]: Starting WireGuard via wg-quick(8) for wgmail...
 505 # Aug 02 21:59:47 sy wg-quick[3424]: wg-quick: `wgmail' already exists
 506 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=1/FAILURE
 507 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 508 # Aug 02 21:59:47 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 509
 510
 511 # According to iptables -S and iptables -t nat -S,
 512 # there are no modifications to iptables rules on a succsfull run,
 513 # and
 514
 515 vpnser=wg-quick@wgmail.service
 516
 517 case $HOSTNAME in
 518   $MAIL_HOST)
 519     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 520     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 521     ;;&
 522   bk)
 523     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 524     ;;&
 525   *)
 526     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 527     if [[ -d $d ]]; then
 528       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 529     fi
 530     ;;
 531 esac
 532
 533 case $HOSTNAME in
 534   li) : ;;
 535   *)
 536     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 537 [Unit]
 538 Requires=mailnn.service
 539 JoinsNamespaceOf=mailnn.service
 540 BindsTo=mailnn.service
 541 StartLimitIntervalSec=0
 542
 543 [Service]
 544 PrivateNetwork=true
 545 # i dont think we need any of these, but it doesnt hurt to stay consistent
 546 BindPaths=$bindpaths
 547
 548 Restart=on-failure
 549 RestartSec=20
 550 EOF
 551     ;;
 552 esac
 553
 554
 555 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 556 i /etc/systemd/system/mailvpn.service <<EOF
 557 [Unit]
 558 Description=OpenVPN tunnel for mail
 559 After=syslog.target network-online.target mailnn.service
 560 Wants=network-online.target
 561 Documentation=man:openvpn(8)
 562 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 563 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 564 # needed to continually restatr
 565 JoinsNamespaceOf=mailnn.service
 566 BindsTo=mailnn.service
 567 StartLimitIntervalSec=0
 568
 569 [Service]
 570 Type=notify
 571 RuntimeDirectory=openvpn-client
 572 RuntimeDirectoryMode=0710
 573 WorkingDirectory=/etc/openvpn/client
 574 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 575 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 576 LimitNPROC=10
 577 # DeviceAllow=/dev/null rw
 578 # DeviceAllow=/dev/net/tun rw
 579 PrivateNetwork=true
 580 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 581 # because of
 582 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 583 # there is a workaround there, but i dont think its really worth it,
 584 # the mail server is fine with a static dns anyways.
 585 # This thread is also interesting,
 586 # https://github.com/slingamn/namespaced-openvpn/issues/7
 587 # todo: the iptables rule at the bottom could be useful to prevent
 588 # dns from leaking in my network namespaced vpn.
 589 # I also like the idea of patching systemd-resolved so it
 590 # will listen on other interfaces, but its not worth my time.
 591 BindPaths=$bindpaths
 592 Restart=always
 593 # time to sleep before restarting a service
 594 RestartSec=20
 595
 596 [Install]
 597 WantedBy=multi-user.target
 598 EOF
 599
 600 i /etc/systemd/system/mailnnroute.service <<'EOF'
 601 [Unit]
 602 Description=Network routing for mailnn
 603 After=syslog.target network-online.target mailnn.service
 604 Wants=network-online.target
 605 JoinsNamespaceOf=mailnn.service
 606 BindsTo=mailnn.service
 607 StartLimitIntervalSec=0
 608
 609 [Service]
 610 Type=simple
 611 RemainAfterExit=true
 612 PrivateNetwork=true
 613 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 614 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 615 Restart=always
 616 RestartSec=20
 617
 618
 619 [Install]
 620 WantedBy=multi-user.target
 621 EOF
 622
 623 #
 624 i /etc/systemd/system/mailnn.service <<'EOF'
 625 [Unit]
 626 Description=Network Namespace for mail vpn service that will live forever and cant fail
 627 After=syslog.target network-online.target
 628 Wants=network-online.target
 629
 630 [Service]
 631 Type=simple
 632 PrivateNetwork=true
 633 ExecStart=/bin/sleep infinity
 634
 635 [Install]
 636 WantedBy=multi-user.target
 637 EOF
 638
 639 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 640 [Unit]
 641 Description=Watchdog to restart services relying on systemd-resolved dir
 642 After=syslog.target network-online.target
 643 Wants=network-online.target
 644 BindsTo=mailnn.service
 645
 646 [Service]
 647 Type=simple
 648 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 649 Restart=always
 650 # time to sleep before restarting a service
 651 RestartSec=10
 652
 653 [Install]
 654 WantedBy=multi-user.target
 655 EOF
 656
 657
 658
 659 # old service name
 660 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 661
 662 # We use a local unbound because systemd-resolved wont accept our
 663 # request, it will only listen to 127.0.0.53 in the main network
 664 # namespace, and rejected feature requests to change that (although I
 665 # could change the code and recompile), but anyways, that could answer
 666 # with things specific to the lan that aren't applicable in this
 667 # namespace, and since unbound is a recursive resolver, it means we just
 668 # use our own ip against dnsbl rate limits.
 669 #
 670 # If we ever notice this change, chattr +i on it
 671 # trust-ad is used in t10+, glibc 2.31
 672
 673 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 674 nameserver 127.0.0.1
 675 options edns0 trust-ad
 676 EOF
 677
 678 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 679 nameserver 127.0.0.53
 680 options edns0 trust-ad
 681 EOF
 682
 683
 684 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 685 nameserver 10.173.8.1
 686 options edns0 trust-ad
 687 EOF
 688
 689 # this is just a bug fix for trisquel.
 690 f=/etc/apparmor.d/usr.sbin.unbound
 691 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 692 if ! grep -qFx "$line" $f; then
 693   badline="/usr/sbin/unbound {"
 694   if ! grep -qFx "$badline" $f; then
 695     err expected line in $f not found
 696   fi
 697   sed -i "s,^$badline$,$line," $f
 698   if systemctl is-active apparmor &>/dev/null; then
 699     m systemctl reload apparmor
 700   fi
 701 fi
 702
 703 # note: anything added to nn_progs needs corresponding rm
 704 # down below in the host switch
 705 nn_progs=(exim4)
 706 if mailhost; then
 707   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 708   # Its in the nn so remote clients can connect to it.
 709   nn_progs+=(spamassassin dovecot)
 710 fi
 711
 712 case $HOSTNAME in
 713   $MAIL_HOST)
 714     # todo, should this be after vpn service
 715     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 716 [Unit]
 717 After=mailnn.service
 718 JoinsNamespaceOf=mailnn.service
 719 BindsTo=mailnn.service
 720 StartLimitIntervalSec=0
 721
 722 [Service]
 723 PrivateNetwork=true
 724 # note the nsswitch bind is actually not needed for bk, but
 725 # its the same file so it does no harm.
 726 BindPaths=$bindpaths
 727
 728 Restart=always
 729 RestartSec=20
 730 EOF
 731
 732     # sooo, there are a few ways to get traffic from the mail network
 733     # namespace to go over the wghole.
 734     #
 735     #1: unify the mail vpn and wghole
 736     # into 1 network.  this seems simple and logical, so I'm doing it.
 737     # One general downside is tying things together, if I need to mess
 738     # with one thing, it breaks the other. Oh well for now.
 739     #
 740     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 741     #
 742     # 3. We can setup the routing to happen on li, which seemed like I
 743     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 744     # wghole clients, but I think that is kind of hacky and breaks ipv4
 745     # routing within the mailvpn, it happened to work just because exim
 746     # prefers ipv6 and that was also available in the mailvpn.
 747     #
 748     # 4. Put the hole interface into the mail network namespace. This
 749     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 750     # vpn routing and establishes a direct connection.  I only use the
 751     # hole vpn for randomish things, it should be fine to join the mail
 752     # nn for that. There should be some way to fix the routing issue
 753     # by doing manual routing, but that doesn't seem like a good use of time.
 754     # relevant:
 755     # https://www.wireguard.com/netns/#
 756     #
 757     # for wireguard debugging
 758     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 759     # dmesg -w
 760
 761     ;;&
 762   $MAIL_HOST|bk)
 763     for unit in ${nn_progs[@]}; do
 764       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 765 [Unit]
 766
 767 # Wants appears better than requires because with requires,
 768 # if the vpnser fails to start, this service won't get run at
 769 # all, even if the vpnser starts on an automatic restart.
 770
 771 Wants=$vpnser
 772 After=network.target mailnn.service $vpnser
 773 JoinsNamespaceOf=mailnn.service
 774 BindsTo=mailnn.service
 775 StartLimitIntervalSec=0
 776
 777 [Service]
 778 PrivateNetwork=true
 779 # note the nsswitch bind is actually not needed for bk, but
 780 # its the same file so it does no harm.
 781 BindPaths=$bindpaths
 782
 783 Restart=always
 784 RestartSec=20
 785 EOF
 786     done
 787     ;;
 788   *)
 789     for unit in exim4 spamassassin dovecot unbound; do
 790       f=/etc/systemd/system/$unit.service.d/nn.conf
 791       if [[ -s $f ]]; then
 792         rm -fv $f
 793         reload=true
 794       fi
 795     done
 796     ;;
 797 esac
 798
 799 # * wghole (another mail vpn)
 800
 801 if $bhost_t; then
 802   i /etc/systemd/system/wg-quick@wghole.service.d/override.conf <<'EOF'
 803 [Unit]
 804 StartLimitIntervalSec=0
 805
 806 [Service]
 807 Restart=on-failure
 808 RestartSec=20
 809 EOF
 810 fi
 811
 812 # * spamassassin config
 813 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 814 # see exim spec
 815 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 816 EOF
 817 if $ir; then
 818   m sysctl -p
 819 fi
 820
 821 i /etc/spamassassin/mylocal.cf <<'EOF'
 822 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 823
 824 # /usr/share/doc/exim4-base/README.Debian.gz:
 825 #   SpamAssassin's default report should not be used in a add_header
 826 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 827 #   warning "BAD HEADER SECTION, Improper folded header field made up
 828 #   entirely of whitespace".) This is a safe, terse alternative:
 829 clear_report_template
 830 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 831 uridnsbl_skip_domain iankelling.org
 832 uridnsbl_skip_domain amnimal.ninja
 833 uridnsbl_skip_domain expertpathologyreview.com
 834 uridnsbl_skip_domain zroe.org
 835 EOF
 836
 837 # 2020-10-19 remove old file. remove this when all hosts updated
 838 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 839
 840 i /etc/default/spamassassin <<'EOF'
 841 # defaults plus debugging flags for an issue im having
 842 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 843 PIDFILE="/var/run/spamd.pid"
 844 # my additions
 845 NICE="--nicelevel 15"
 846 CRON=1
 847 EOF
 848 #####   end spamassassin config
 849
 850
 851 # * Update mail cert
 852
 853
 854 ## needed only for openvpn mail vpn.
 855 # if [[ -e /p/c/filesystem ]]; then
 856 #   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 857 #   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 858 #   # after my internet was down for a bit:
 859 #   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 860 #   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 861 # fi
 862
 863 # With openvpn, I didn't get around to persisting the openvpn
 864 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 865 # manually get the cert. However, we aren't using openvpn anymore, so it
 866 # is commented out.
 867 #
 868 # case $HOSTNAME in
 869 #   bk)
 870 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 871 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 872 #       exit 1
 873 #     fi
 874 #     ;;
 875 # esac
 876
 877 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 878
 879 i /etc/systemd/system/mailcert.service <<'EOF'
 880 [Unit]
 881 Description=Mail cert rsync
 882 After=multi-user.target
 883
 884 [Service]
 885 Type=oneshot
 886 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 887 EOF
 888 i /etc/systemd/system/mailcert.timer <<'EOF'
 889 [Unit]
 890 Description=Run mail-cert once a day
 891
 892 [Timer]
 893 OnCalendar=daily
 894
 895 [Install]
 896 WantedBy=timers.target
 897 EOF
 898
 899
 900 wghost=${HOSTNAME}wg.b8.nz
 901 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 902   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 903           certonly --manual --preferred-challenges=dns \
 904           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 905           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 906           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 907 fi
 908
 909 # * fail2ban
 910
 911 # todo: test that these configs actually work, eg run
 912 # s iptables-exim -S
 913 # and see someone is banned.
 914
 915 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 916     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 917 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 918 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 919
 920 # Fail2Ban configuration file
 921 #
 922 # Author: Daniel Black
 923 #
 924 # This is a included configuration file and includes the definitions for the iptables
 925 # used in all iptables based actions by default.
 926 #
 927 # The user can override the defaults in iptables-common.local
 928 #
 929 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 930 #       made config file IPv6 capable (see new section Init?family=inet6)
 931
 932 [INCLUDES]
 933
 934 after = iptables-blocktype.local
 935         iptables-common.local
 936 # iptables-blocktype.local is obsolete
 937
 938 [Definition]
 939
 940 # Option:  actionflush
 941 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 942 # Values:  CMD
 943 #
 944 actionflush = <iptables> -F f2b-<name>
 945
 946
 947 [Init]
 948
 949 # Option:  chain
 950 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 951 #          added
 952 # Values:  STRING  Default: INPUT
 953 chain = INPUT
 954
 955 # Default name of the chain
 956 #
 957 name = default
 958
 959 # Option:  port
 960 # Notes.:  specifies port to monitor
 961 # Values:  [ NUM | STRING ]  Default:
 962 #
 963 port = ssh
 964
 965 # Option:  protocol
 966 # Notes.:  internally used by config reader for interpolations.
 967 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 968 #
 969 protocol = tcp
 970
 971 # Option:  blocktype
 972 # Note:    This is what the action does with rules. This can be any jump target
 973 #          as per the iptables man page (section 8). Common values are DROP
 974 #          REJECT, REJECT --reject-with icmp-port-unreachable
 975 # Values:  STRING
 976 blocktype = REJECT --reject-with icmp-port-unreachable
 977
 978 # Option:  returntype
 979 # Note:    This is the default rule on "actionstart". This should be RETURN
 980 #          in all (blocking) actions, except REJECT in allowing actions.
 981 # Values:  STRING
 982 returntype = RETURN
 983
 984 # Option:  lockingopt
 985 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 986 #          running concurrently and causing irratic behavior.  -w was introduced
 987 #          in iptables 1.4.20, so might be absent on older systems
 988 #          See https://github.com/fail2ban/fail2ban/issues/1122
 989 # Values:  STRING
 990 lockingopt = -w
 991
 992 # Option:  iptables
 993 # Notes.:  Actual command to be executed, including common to all calls options
 994 # Values:  STRING
 995 iptables = /usr/local/bin/iptables-exim <lockingopt>
 996
 997
 998 [Init?family=inet6]
 999
1000 # Option:  blocktype (ipv6)
1001 # Note:    This is what the action does with rules. This can be any jump target
1002 #          as per the iptables man page (section 8). Common values are DROP
1003 #          REJECT, REJECT --reject-with icmp6-port-unreachable
1004 # Values:  STRING
1005 blocktype = REJECT --reject-with icmp6-port-unreachable
1006
1007 # Option:  iptables (ipv6)
1008 # Notes.:  Actual command to be executed, including common to all calls options
1009 # Values:  STRING
1010 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
1011 EOF
1012
1013 i /etc/fail2ban/jail.d/exim.local <<'EOF'
1014 [exim]
1015 enabled  = true
1016 port     = 25,587
1017 filter   = exim
1018 banaction = iptables-exim
1019
1020 # 209.51.188.13 = mail.fsf.org
1021 # 2001:470:142::13 = mail.fsf.org
1022 # 209.51.188.92 = eggs.gnu.org
1023 # 2001:470:142:3::10 = eggs.gnu.org
1024 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
1025 # 10.173.8.1 = non-nn net
1026 ignoreip = 209.51.188.13 2001:470:142::13 209.51.188.92 2001:470:142:3::10 72.14.176.105 2600:3c00:e000:280::2 10.173.8.1
1027 EOF
1028 if $ir; then
1029   m systemctl restart fail2ban
1030 fi
1031
1032 # * common exim4 config
1033
1034
1035 ## old, not using forward files anymore
1036 rm -fv $uhome/.forward /root/.forward
1037
1038
1039 # Make all system users be aliases. preventative
1040 # prevents things like cron mail for user without alias
1041 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
1042   if [[ ! $user ]]; then
1043     continue
1044   fi
1045   if ! grep -q "^$user:" /etc/aliases; then
1046     echo "$user: root" |m tee -a /etc/aliases
1047   fi
1048 done
1049
1050
1051 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
1052   case $HOSTNAME in
1053     $MAIL_HOST)
1054       sed -i "/^user:/d" /etc/aliases
1055       ;;
1056     *)
1057       if ! grep -q "^$user:" /etc/aliases; then
1058         echo "$user: root" |m tee -a /etc/aliases
1059       fi
1060       ;;
1061   esac
1062 done
1063
1064
1065 . /a/bin/bash_unpublished/priv-mail-setup
1066
1067
1068 m gpasswd -a iank adm #needed for reading logs
1069
1070 ### make local bounces go to normal maildir
1071 # local mail that bounces goes to /Maildir or /root/Maildir
1072 dirs=(/m/md/bounces/{cur,tmp,new})
1073 m mkdir -p ${dirs[@]}
1074 m chown iank:iank /m /m/md
1075 m ln -sfT /m/md /m/iank
1076 m chmod 771 /m /m/md
1077 m chown -R $u:Debian-exim /m/md/bounces
1078 m chmod 775 ${dirs[@]}
1079 m usermod -a -G Debian-exim $u
1080 for d in /Maildir /root/Maildir; do
1081   if [[ ! -L $d ]]; then
1082     m rm -rf $d
1083   fi
1084   m ln -sf -T /m/md/bounces $d
1085 done
1086
1087 # dkim, client passwd file
1088 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1089 f=/p/c/filesystem/etc/exim4/passwd.client
1090 if [[ -e $f ]]; then
1091   files+=($f)
1092 fi
1093 if (( ${#files[@]} )); then
1094   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1095     ${files[@]} /etc/exim4
1096 fi
1097
1098 # By default, only 10 days of logs are kept. increase that.
1099 # And dont compress, I look back at logs too often and
1100 # dont need the annoyance of decompressing them all the time.
1101 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1102 files=(/var/log/exim4/*.gz)
1103 if (( ${#files[@]} )); then
1104   gunzip ${files[@]}
1105 fi
1106
1107 ## disabled. not using .forward files, but this is still interesting
1108 ## for reference.
1109 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1110 # # i only need .forwards, so just doing that one.
1111 # cd /etc/exim4/conf.d/router
1112 # b=userforward_higher_priority
1113 # # replace the router name so it is unique
1114 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1115 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1116
1117 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1118
1119 # alerts is basically the postmaster address
1120 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1121 \$a root: alerts@iankelling.org
1122 /^root:/d
1123 EOF
1124
1125 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1126 ncsoft@zroe.org graceq2323@gmail.com hE
1127 EOF
1128
1129 # old name
1130 rm -fv /etc/exim4/conf.d/retry/37_retry
1131
1132 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1133 # Retry fast for my own domains
1134 iankelling.org * F,1d,4m;F,14d,1h
1135 amnimal.ninja * F,1d,4m;F,14d,1h
1136 expertpathologyreview.com * F,1d,4m;F,14d,1h
1137 je.b8.nz * F,1d,4m;F,14d,1h
1138 zroe.org * F,1d,4m;F,14d,1h
1139 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1140
1141 # The spec says the target domain will be used for temporary host errors,
1142 # but i've found that isn't correct, the hostname is required
1143 # at least sometimes.
1144 nn.b8.nz * F,1d,4m;F,14d,1h
1145 defaultnn.b8.nz * F,1d,4m;F,14d,1h
1146 mx.iankelling.org * F,1d,4m;F,14d,1h
1147 bk.b8.nz * F,1d,4m;F,14d,1h
1148 eggs.gnu.org * F,1d,4m;F,14d,1h
1149 fencepost.gnu.org * F,1d,4m;F,14d,1h
1150
1151 # afaik our retry doesnt need this, but just using everything
1152 mx.amnimal.ninja * F,1d,4m;F,14d,1h
1153 mx.expertpathologyreview.com * F,1d,4m;F,14d,1h
1154
1155
1156 mail.fsf.org * F,1d,15m;F,14d,1h
1157 EOF
1158
1159
1160 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1161
1162 # separate file so without quoted EOF for convenience
1163 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1164 # normally empty, I set this so I can set the envelope address
1165 # when doing mail redelivery to invoke filters. Also allows
1166 # me exiqgrep and stuff.
1167 MAIN_TRUSTED_GROUPS = $u
1168 EOF
1169
1170 cd /etc/exim4
1171 {
1172   for f in *-private.pem; do
1173     echo ${f%-private.pem}
1174   done
1175 } | i /etc/exim4/conf.d/my-dkim-domains
1176
1177 cat >/etc/exim4/conf.d/transport/11_iank <<'EOF'
1178 # This unsets the default macro defined in on t11 in
1179 # /etc/exim4/conf.d/transport/10_exim4-config_transport-macros
1180 # It seems like a very odd choice that this has become
1181 # the default in t11. Normal smarthost clients use username/password
1182 # auth. Oh well.
1183 REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS ==
1184 EOF
1185
1186 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1187 MAIN_TLS_ENABLE = true
1188
1189 # require tls connections for all smarthosts
1190 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1191
1192 # debian exim config added this in 2016 or so?
1193 # it's part of the smtp spec, to limit lines to 998 chars
1194 # but a fair amount of legit mail does not adhere to it. I don't think
1195 # this should be default, like it says in
1196 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1197 # todo: the bug for introducing this was about headers, but
1198 # the fix maybe is for all lines? one says gmail rejects, the
1199 # other says gmail does not reject. figure out and open a new bug.
1200 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1201
1202 # more verbose logs
1203 MAIN_LOG_SELECTOR = +all
1204
1205 # Based on spec, seems like a good idea to be nice.
1206 smtp_return_error_details = true
1207
1208 # default is 10. when exim has been down for a bit, fsf mailserver
1209 # will do a big send in one connection, then exim decides to put
1210 # the messages in the queue instead of delivering them, to avoid
1211 # spawning too many delivery processes. This is the same as the
1212 # fsfs value. And the corresponding one for how many messages
1213 # to send out in 1 connection remote_max_parallel = 256
1214 smtp_accept_queue_per_connection = 500
1215
1216
1217 DKIM_CANON = relaxed
1218 DKIM_SELECTOR = li
1219
1220 # From comments in
1221 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1222 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1223 # There could be some circumstance when the
1224 # from: isnt our domain, but the envelope sender is
1225 # and so still want to sign, but I cant think of any case.
1226 #DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1227 # In t11, we cant do the above anymore because this is tainted data used in a file lookup.
1228 # /usr/share/doc/exim4/NEWS.Debian.gz suggests to use lookups to untaint data.
1229 DKIM_DOMAIN = ${lookup {${domain:$rh_from:}}lsearch,ret=key{/etc/exim4/conf.d/my-dkim-domains}}
1230
1231 # The file is based on the outgoing domain-name in the from-header.
1232 # sign if key exists
1233 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1234
1235 # most of the ones that gmail seems to use.
1236 # Exim has horrible default of signing unincluded
1237 # list- headers since they got mentioned in an
1238 # rfc, but this messes up mailing lists, like gnu/debian which want to
1239 # keep your dkim signature intact but add list- headers.
1240 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1241
1242 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1243
1244 hostlist iank_trusted = <; \
1245 # veth0
1246 10.173.8.1 ; \
1247 # li li_ip6
1248 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \
1249 # li_vpn_net li_vpn_net_ip6s
1250 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \
1251 # bk bk_ip6
1252 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \
1253 # je je_ipv6
1254 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \
1255 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1256 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1257
1258
1259 # this is the default delay_warning_condition, plus matching on local_domains.
1260 # If I have some problem with my local system that causes delayed delivery,
1261 # I dont want to send warnings out to non-local domains.
1262 delay_warning_condition = ${if or {\
1263   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1264   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1265   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1266   { match_domain{$domain}{+local_domains} }\
1267   } {no}{yes}}
1268
1269
1270 # enable 587 in addition to the default 25, so that
1271 # i can send mail where port 25 is firewalled by isp
1272 daemon_smtp_ports = 25 : 587
1273 # default of 25, can get stuck when catching up on mail
1274 smtp_accept_max = 400
1275 smtp_accept_reserve = 100
1276 smtp_reserve_hosts = +iank_trusted
1277
1278 # Rules that make receiving more liberal should be on backup hosts
1279 # so that we dont reject mail accepted by MAIL_HOST
1280 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
1281 EOF
1282
1283 rm -fv /etc/exim4/rcpt_local_acl # old path
1284
1285 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1286 # This acl already exists in rcpt, this just makes it more widespread.
1287 # See the comment there for its rationale. The reason it needs to be
1288 # more widespread is that I've turned on sender verification, but cron
1289 # emails can fail sender verification since I may be in a network that
1290 # doesn't have my local dns.
1291 accept
1292   authenticated = *
1293
1294 # i setup a local programs smtp to mail.iankelling.org, this
1295 # skips sender verification for it.
1296 accept
1297   hosts = 10.173.8.1
1298 EOF
1299
1300 rm -fv /etc/exim4/data_local_acl # old path
1301
1302 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1303 # Except for the "condition =", this was
1304 # a comment in the check_data acl. The comment about this not
1305 # being suitable has been changed in newer exim versions. The only thing
1306 # related I found was to
1307 # add the condition =, cuz spamassassin has problems with big
1308 # messages and spammers don't bother with big messages,
1309 # but I've increased the size from 10k
1310 # suggested in official docs, and 100k in the wiki example because
1311 # those docs are rather old and I see a 110k spam message
1312 # pretty quickly looking through my spam folder.
1313
1314 warn
1315   !hosts = +iank_trusted
1316   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1317
1318 warn
1319   !hosts = +iank_trusted
1320   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1321   !authenticated = plain_server:login_server
1322   condition = ${if < {$message_size}{5000K}}
1323   spam = Debian-exim:true
1324   add_header = X-Spam_score_int: $spam_score_int
1325   add_header = X-Spam_score: $spam_score
1326   add_header = X-Spam_bar: $spam_bar
1327   add_header = X-Spam_report: $spam_report
1328   add_header = X-Spam_action: $spam_action
1329
1330
1331 #accept
1332 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1333 #  dmarc_status = reject:quarantine
1334 #  add_header = Reply-to: dmarctest@iankelling.org
1335
1336 EOF
1337
1338 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1339 ### router/900_exim4-config_local_user
1340 #################################
1341
1342 # This router matches local user mailboxes. If the router fails, the error
1343 # message is "Unknown user".
1344 local_user:
1345   debug_print = "R: local_user for $local_part@$domain"
1346   driver = accept
1347   domains = +local_domains
1348 # ian: default file except where mentioned.
1349 # ian: commented this. I get all local parts. for bk, an rcpt
1350 # check handles checking with dovecot, and the only router
1351 # after this is root.
1352 #  local_parts = ! root
1353   transport = LOCAL_DELIVERY
1354   cannot_route_message = Unknown user
1355 # ian: added for + addressing.
1356   local_part_suffix = +*
1357   local_part_suffix_optional
1358 EOF
1359 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1360 dovecot_lmtp:
1361   driver = lmtp
1362   socket = /var/run/dovecot/lmtp
1363   #maximum number of deliveries per batch, default 1
1364   batch_max = 200
1365   envelope_to_add
1366 EOF
1367
1368 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1369 # same as debians 30_exim4-config_remote_smtp, but
1370 # with interface added at the end.
1371
1372 remote_smtp_vpn:
1373   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1374   driver = smtp
1375 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1376   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1377 .endif
1378 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1379   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1380 .endif
1381 .ifdef REMOTE_SMTP_RETURN_PATH
1382   return_path = REMOTE_SMTP_RETURN_PATH
1383 .endif
1384 .ifdef REMOTE_SMTP_HELO_DATA
1385   helo_data=REMOTE_SMTP_HELO_DATA
1386 .endif
1387 .ifdef DKIM_DOMAIN
1388 dkim_domain = DKIM_DOMAIN
1389 .endif
1390 .ifdef DKIM_SELECTOR
1391 dkim_selector = DKIM_SELECTOR
1392 .endif
1393 .ifdef DKIM_PRIVATE_KEY
1394 dkim_private_key = DKIM_PRIVATE_KEY
1395 .endif
1396 .ifdef DKIM_CANON
1397 dkim_canon = DKIM_CANON
1398 .endif
1399 .ifdef DKIM_STRICT
1400 dkim_strict = DKIM_STRICT
1401 .endif
1402 .ifdef DKIM_SIGN_HEADERS
1403 dkim_sign_headers = DKIM_SIGN_HEADERS
1404 .endif
1405 .ifdef TLS_DH_MIN_BITS
1406 tls_dh_min_bits = TLS_DH_MIN_BITS
1407 .endif
1408 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1409 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1410 .endif
1411 .ifdef REMOTE_SMTP_PRIVATEKEY
1412 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1413 .endif
1414 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1415   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1416 .endif
1417 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1418   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1419 .endif
1420   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1421 EOF
1422
1423 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1424 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1425
1426 smarthost_dkim:
1427   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1428   driver = smtp
1429   multi_domain
1430   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1431         {\
1432         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1433         }\
1434         {} \
1435       }
1436 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1437   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1438 .endif
1439 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1440   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1441 .endif
1442 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1443   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1444 .endif
1445 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1446   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1447 .endif
1448 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1449   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1450 .endif
1451 .ifdef REMOTE_SMTP_RETURN_PATH
1452   return_path = REMOTE_SMTP_RETURN_PATH
1453 .endif
1454 .ifdef REMOTE_SMTP_HELO_DATA
1455   helo_data=REMOTE_SMTP_HELO_DATA
1456 .endif
1457 .ifdef TLS_DH_MIN_BITS
1458 tls_dh_min_bits = TLS_DH_MIN_BITS
1459 .endif
1460 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1461 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1462 .endif
1463 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1464 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1465 .endif
1466 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1467   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1468 .endif
1469 .ifdef DKIM_DOMAIN
1470 dkim_domain = DKIM_DOMAIN
1471 .endif
1472 .ifdef DKIM_SELECTOR
1473 dkim_selector = DKIM_SELECTOR
1474 .endif
1475 .ifdef DKIM_PRIVATE_KEY
1476 dkim_private_key = DKIM_PRIVATE_KEY
1477 .endif
1478 .ifdef DKIM_CANON
1479 dkim_canon = DKIM_CANON
1480 .endif
1481 .ifdef DKIM_STRICT
1482 dkim_strict = DKIM_STRICT
1483 .endif
1484 .ifdef DKIM_SIGN_HEADERS
1485 dkim_sign_headers = DKIM_SIGN_HEADERS
1486 .endif
1487 EOF
1488
1489
1490 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1491 # default stuff, i havent checked if its needed
1492 dc_minimaldns='false'
1493 dc_relay_nets=''
1494 CFILEMODE='644'
1495 dc_use_split_config='true'
1496 dc_mailname_in_oh='true'
1497 EOF
1498
1499
1500 # * radicale
1501 if mailhost; then
1502   if ! mountpoint /o; then
1503     echo "error /o is not a mountpoint" >&2
1504     exit 1
1505   fi
1506
1507   # davx/davdroid setup instructions at the bottom
1508
1509   # main docs:
1510   # http://radicale.org/user_documentation/
1511   # https://davdroid.bitfire.at/configuration/
1512
1513   # note on debugging: if radicale can't bind to the address,
1514   # in the log it just says "Starting Radicale". If you run
1515   # it in the foreground, it will give more info. Background
1516   # plus debug does not help.
1517   # sudo -u radicale radicale -D -f
1518
1519   # created password file with:
1520   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1521   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1522   # # setup chgrp www-data in ./conflink
1523
1524   pi-nostart radicale
1525
1526   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1527 [Unit]
1528
1529 After=network.target network-online.target mailnn.service $vpnser
1530
1531 Wants=$vpnser
1532 JoinsNamespaceOf=mailnn.service
1533 StartLimitIntervalSec=0
1534
1535 [Service]
1536 PrivateNetwork=true
1537 BindPaths=$bindpaths
1538 Restart=always
1539 # time to sleep before restarting a service
1540 RestartSec=20
1541
1542 [Install]
1543 # for openvpn
1544 RequiredBy=$vpnser
1545 EOF
1546
1547
1548   # use persistent uid/gid
1549   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1550   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1551   if [[ $uid != 609 ]]; then
1552     m systemctl stop radicale ||:
1553     m usermod -u 609 radicale
1554     m groupmod -g 609 radicale
1555     m usermod -g 609 radicale
1556   fi
1557   m find /o/radicale  -xdev -exec chown -h 609 {} +
1558   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1559
1560
1561   # I moved /var/lib/radicale after it's initialization.
1562   # I did a sudo -u radicale git init in the collections subfolder
1563   # after it gets created, per the git docs.
1564   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1565
1566   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1567
1568   # more config is for li in distro-end
1569
1570   # coment in this file says this is needed for it to run on startup
1571   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1572
1573   # comments say default is 0.0.0.0:5232
1574   m setini hosts 10.8.0.4:5232 server
1575   # https://radicale.org/2.1.html
1576   m setini type http_x_remote_user auth
1577
1578
1579   # disable power management feature, set to 240 min sync interval,
1580   # so it shouldn't be bad.
1581
1582   # davx^5 from f-droid
1583   # login with url and user name
1584   # url https://cal.iankelling.org/ian
1585   # username ian
1586   # pass, see password manager for radicale
1587   #
1588   # add account dialog:
1589   #
1590   # set account name as ian@iankelling.org, per help text below the
1591   # field.
1592   #
1593   # switch to groups are per-contact categories,
1594   # per https://davdroid.bitfire.at/configuration/radicale/
1595   #
1596   #
1597   # After setting up account, I added one address book, named
1598   # ianaddr. calender was already created, named ian. checked boxes under
1599   # both. synced.
1600   #
1601   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1602   #
1603   # ignorable background info:
1604   #
1605   # opentasks uses the calendar file.
1606   #
1607   # The address book I created got a uuid as a name for the file. Note
1608   # the .props file says if it's a calendar or addressbook.
1609   #
1610   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1611   # both show the requests happening. Without creating the address book,
1612   # after creating a contact, a sync would delete it.
1613   #
1614   # Address books correspond to .props files in the radicale dir.
1615   #
1616   #  Some background is here,
1617   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1618   # which shows separate vcard option is from rfc 6350, the other is 2426,
1619   # radicale page says it implements the former not the latter,
1620   # which conflicts with the documentation of which to select, but whatever.
1621   # http://radicale.org/technical_choices/
1622   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1623   #
1624   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1625
1626   # Note, radicale had built-in git support to track changes, but they
1627   # removed it in 2.0.
1628
1629 fi
1630
1631 # * dovecot
1632
1633 # ** $MAIL_HOST|bk|je)
1634 case $HOSTNAME in
1635   $MAIL_HOST|bk|je)
1636     # based on a little google and package search, just the dovecot
1637     # packages we need instead of dovecot-common.
1638     #
1639     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1640     # directly.  The reason to do this is to use dovecot\'s sieve, which
1641     # can generally do more than exims filters (a few things less) and
1642     # sieve has the benefit of being supported in postfix and
1643     # proprietary/weird environments, so there is more examples on the
1644     # internet.
1645     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1646
1647     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1648       if [[ -e $f ]]; then
1649         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1650         break
1651       fi
1652     done
1653     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1654       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1655     done
1656
1657     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1658     i /etc/dovecot/dhparam <<'EOF'
1659 -----BEGIN DH PARAMETERS-----
1660 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1661 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1662 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1663 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1664 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1665 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1666 -----END DH PARAMETERS-----
1667 EOF
1668     {
1669
1670       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1671         cat <<'EOF'
1672 ssl_cert = </etc/exim4/fullchain.pem
1673 ssl_key = </etc/exim4/privkey.pem
1674 EOF
1675       else
1676         # We have a lets encrypt hooks that puts things here.
1677         # This is just for bk, which uses the vpn cert in exim
1678         # for sending mail, but the local hostname cert for
1679         # dovecot.
1680         cat <<'EOF'
1681 ssl_cert = </etc/exim4/exim.crt
1682 ssl_key = </etc/exim4/exim.key
1683 EOF
1684       fi
1685
1686       cat <<'EOF'
1687 # https://ssl-config.mozilla.org
1688 ssl = required
1689 # this is the same as the certbot list, i check changes in /a/bin/ds/filesystem/usr/local/bin/check-lets-encrypt-ssl-settings
1690 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
1691 ssl_protocols = TLSv1.2
1692 ssl_prefer_server_ciphers = no
1693
1694 protocol lmtp {
1695 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1696 # default is just $mail_plugins
1697   mail_plugins = $mail_plugins sieve
1698 }
1699 EOF
1700       if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show dovecot-core)" ge 1:2.3; then
1701         cat <<EOF
1702 ssl_dh = </etc/dovecot/dhparam
1703 EOF
1704       fi
1705     } >/etc/dovecot/local.conf
1706
1707     ;;&
1708
1709   # **  $MAIL_HOST)
1710   $MAIL_HOST)
1711     # If we changed 90-sieve.conf and removed the active part of the
1712     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1713     # default config if not needed. This won\'t work as a symlink in /a/c
1714     # unfortunately.
1715     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1716
1717     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1718       m touch $uhome/sieve/personal{,end}{,test}.sieve
1719     fi
1720
1721     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1722     cat >>/etc/dovecot/local.conf <<EOF
1723 # simple password file based login
1724 !include conf.d/auth-passwdfile.conf.ext
1725
1726 # ian: %u is used for alerts user vs iank
1727 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1728 mail_uid = $u
1729 mail_gid = $u
1730
1731 protocol lmtp {
1732 # For a normal setup with exim, we need something like this, which
1733 # removes the domain part
1734 #  auth_username_format = %Ln
1735 #
1736 #  or else # Exim says something like
1737 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1738 # Dovecot verbose log says something like
1739 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1740 # reference: http://wiki.dovecot.org/LMTP/Exim
1741 #
1742 # However, I use this to direct all mail to the same inbox.
1743 # A normal way to do this, which I did at first is to have
1744 # a router in exim almost at the end, eg 950,
1745 #local_catchall:
1746 #  debug_print = "R: catchall for \$local_part@\$domain"
1747 #  driver = redirect
1748 #  domains = +local_domains
1749 #  data = $u
1750 # based on
1751 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1752 # with superflous options removed.
1753 # However, this causes the envelope to be rewritten,
1754 # which makes filtering into mailboxes a little less robust or more complicated,
1755 # so I've done it this way instead. it also requires
1756 # modifying the local router in exim.
1757   auth_username_format = $u
1758 }
1759 EOF
1760     ;;&
1761   # **  bk|je)
1762   bk|je)
1763     chown -R mail.mail /m/md
1764
1765     f=/etc/dovecot/conf.d/10-auth.conf
1766     if [[ -e $f ]]; then
1767       mv $f $f-iank-disabled
1768     fi
1769
1770     cat >>/etc/dovecot/local.conf <<EOF
1771 !include /etc/dovecot/local.conf.ext
1772
1773 # for debugging info, uncomment these.
1774 # logs go to syslog and to /var/log/mail.log
1775 #auth_verbose=yes
1776 #mail_debug=yes
1777
1778
1779 protocol lmtp {
1780 # This downcases the localpart. default is case sensitive.
1781 # case sensitive local part will miss out on valid email when some person or system
1782 # mistakenly capitalizes things.
1783   auth_username_format = %Lu
1784 }
1785
1786 # make 147 only listen on localhost, plan to use for nextcloud.
1787 # copied from mailinabox
1788 service imap-login {
1789   inet_listener imap {
1790     address = 127.0.0.1
1791   }
1792 }
1793 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1794 service auth {
1795   unix_listener auth-client {
1796     user = Debian-exim
1797     group = Debian-exim
1798   }
1799 }
1800
1801
1802 plugin {
1803   sieve_before = /etc/dovecot/sieve-spam.sieve
1804   # from mailinabox
1805   sieve = /m/sieve/%d/%n.sieve
1806   sieve_dir = /m/sieve/%d/%n
1807 }
1808
1809
1810 # all taken from mailinabox.
1811 mail_location = maildir:/m/md/%d/%n
1812 # meh, ok.
1813 mail_privileged_group = mail
1814 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1815 first_valid_uid = 1
1816
1817 # todo: test these changes in the universal config
1818 # mailboxes taken from mailinabox but removed
1819 # settings duplicate to defaults
1820 namespace inbox {
1821   mailbox INBOX {
1822     auto = subscribe
1823   }
1824   mailbox Spam {
1825     special_use = \Junk
1826     auto = subscribe
1827   }
1828   mailbox Drafts {
1829     auto = subscribe
1830   }
1831   mailbox Sent {
1832     auto = subscribe
1833   }
1834   mailbox Trash {
1835     auto = subscribe
1836   }
1837   mailbox Archive {
1838     special_use = \Archive
1839     auto = subscribe
1840   }
1841 }
1842 auth_mechanisms = plain login
1843 EOF
1844
1845     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1846 require ["regex", "fileinto", "imap4flags"];
1847
1848 if allof (header :regex "X-Spam-Status" "^Yes") {
1849   fileinto "Spam";
1850   stop;
1851 }
1852 EOF
1853
1854     i /etc/dovecot/local.conf.ext <<'EOF'
1855 passdb {
1856   driver = sql
1857   args = /etc/dovecot/dovecot-sql.conf.ext
1858 }
1859 userdb {
1860   driver = sql
1861   args = /etc/dovecot/dovecot-sql.conf.ext
1862 }
1863
1864 EOF
1865
1866     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1867 # from mailinabox
1868 driver = sqlite
1869 # for je and bk, populated the testignore users for the relevant domains
1870 connect = /m/rc/users.sqlite
1871 default_pass_scheme = SHA512-CRYPT
1872 password_query = SELECT email as user, password FROM users WHERE email='%u';
1873 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1874 iterate_query = SELECT email AS user FROM users;
1875 EOF
1876     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1877
1878     # db needs to be in a www-data writable directory
1879     db=/m/rc/users.sqlite
1880     if [[ ! -s $db ]]; then
1881       m mkdir -p /m/rc
1882       m sqlite3 $db <<'EOF'
1883 CREATE TABLE users (
1884 id INTEGER PRIMARY KEY AUTOINCREMENT,
1885 email TEXT NOT NULL UNIQUE,
1886 password TEXT NOT NULL,
1887 extra,
1888 privileges TEXT NOT NULL DEFAULT '');
1889 EOF
1890     fi
1891     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
1892     #
1893     # example of adding a user:
1894     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1895     # sqlite3 /m/rc/users.sqlite <<'EOF'
1896     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1897     #EOF
1898     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1899
1900     # this should be at the end since it requires a valid dovecot config
1901     m sievec /etc/dovecot/sieve-spam.sieve
1902     ;;&
1903   # **  bk)
1904   bk)
1905     # roundcube uses this
1906     mkdir -p /m/sieve
1907     chown mail.mail /m/sieve
1908     m pi dovecot-managesieved
1909     ;;
1910 esac
1911
1912 # * thunderbird autoconfig setup
1913
1914 bkdomains=(expertpathologyreview.com amnimal.ninja)
1915 if [[ $HOSTNAME == bk ]]; then
1916   for domain in ${bkdomains[@]}; do
1917     m /a/exe/web-conf apache2 autoconfig.$domain
1918     dir=/var/www/autoconfig.$domain/html/mail
1919     m mkdir -p $dir
1920     # taken from mailinabox
1921     i $dir/config-v1.1.xml <<EOF
1922 <?xml version="1.0" encoding="UTF-8"?>
1923 <clientConfig version="1.1">
1924     <emailProvider id="$domain">
1925       <domain>$domain</domain>
1926
1927       <displayName>$domain Mail</displayName>
1928       <displayShortName>$domain</displayShortName>
1929
1930       <incomingServer type="imap">
1931          <hostname>mail2.iankelling.org</hostname>
1932          <port>993</port>
1933          <socketType>SSL</socketType>
1934          <username>%EMAILADDRESS%</username>
1935          <authentication>password-cleartext</authentication>
1936       </incomingServer>
1937
1938       <outgoingServer type="smtp">
1939          <hostname>mail2.iankelling.org</hostname>
1940          <port>587</port>
1941          <socketType>STARTTLS</socketType>
1942          <username>%EMAILADDRESS%</username>
1943          <authentication>password-cleartext</authentication>
1944          <addThisServer>true</addThisServer>
1945          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1946       </outgoingServer>
1947
1948       <documentation url="https://$domain/">
1949          <descr lang="en">$domain website.</descr>
1950       </documentation>
1951     </emailProvider>
1952
1953     <webMail>
1954       <loginPage url="https://$domain/roundcube" />
1955       <loginPageInfo url="https://$domain/roundcube" >
1956         <username>%EMAILADDRESS%</username>
1957         <usernameField id="rcmloginuser" name="_user" />
1958         <passwordField id="rcmloginpwd" name="_pass" />
1959         <loginButton id="rcmloginsubmit" />
1960       </loginPageInfo>
1961     </webMail>
1962     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1963 </clientConfig>
1964 EOF
1965   done
1966 fi
1967
1968 # * roundcube setup
1969
1970 if [[ $HOSTNAME == bk ]]; then
1971
1972   # zip according to /installer
1973   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1974   # $config['enable_installer'] = true;
1975   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1976
1977   ### begin composer install
1978   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1979   # cd $(mktemp -d)
1980   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1981   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1982   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1983   #   echo 'ERROR: Invalid composer installer checksum' >&2
1984   #   rm -fv composer-setup.php
1985   #   exit 1
1986   # fi
1987   # m php composer-setup.php --quiet
1988   # rm -fv composer-setup.php
1989   # m mv composer.phar /usr/local/bin
1990
1991   # the above method gets composer2, carddav plugin at least doesnt work with that
1992   # yet, it was just released 10-24-2020.
1993   m cd /usr/local/bin
1994   m wget -nv -N https://getcomposer.org/composer-1.phar
1995   chmod +x composer-1.phar
1996   ### end composer install
1997
1998   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1999   ncdirs=(/var/www/ncninja)
2000   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
2001   # point debian cronjob to our local install, preventing daily cron error
2002
2003   # debian's cronjob will fail, remove both paths it uses just to be sure
2004   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
2005
2006   #### begin dl roundcube
2007   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
2008   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
2009   cd /root
2010   if [[ -e $f ]]; then
2011     timestamp=$(stat -c %Y $f)
2012   else
2013     timestamp=0
2014   fi
2015   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
2016   new_timestamp=$(stat -c %Y $f)
2017   for rcdir in ${rcdirs[@]}; do
2018     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
2019       m tar -C /usr/local/lib --no-same-owner -zxf $f
2020       m rm -rf $rcdir
2021       m mv /usr/local/lib/roundcubemail-$v $rcdir
2022     fi
2023   done
2024   #### end dl roundcube
2025
2026   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2027     domain=${bkdomains[i]}
2028     rcdir=${rcdirs[i]}
2029     rcbase=${rcdir##*/}
2030     ncdir=${ncdirs[i]}
2031
2032     # copied from debians cronjob
2033     i /etc/cron.d/$rcbase <<EOF
2034 #  Roundcube database cleaning: finally removes all records that are
2035 #  marked as deleted.
2036 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
2037 EOF
2038
2039     m /a/exe/web-conf - apache2 $domain <<EOF
2040 Alias /roundcube $rcdir
2041 ### begin roundcube settings
2042 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
2043 <Directory $rcdir/>
2044   Options +FollowSymLinks
2045   # This is needed to parse $rcdir/.htaccess.
2046   AllowOverride All
2047   Require all granted
2048 </Directory>
2049 # Protecting basic directories:
2050 <Directory $rcdir/config>
2051   Options -FollowSymLinks
2052   AllowOverride None
2053 </Directory>
2054 ### end roundcube settings
2055
2056
2057 ### begin nextcloud settings
2058 Alias /nextcloud "$ncdir/"
2059 <Directory $ncdir/>
2060   Require all granted
2061   AllowOverride All
2062   Options FollowSymLinks MultiViews
2063
2064   <IfModule mod_dav.c>
2065     Dav off
2066   </IfModule>
2067
2068 </Directory>
2069
2070 # based on install checker, links to
2071 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
2072 # their example was a bit wrong, I figured it out by adding
2073 # LogLevel warn rewrite:trace5
2074 # then watching the apache logs
2075
2076 RewriteEngine on
2077 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2078 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2079 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2080 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2081 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2082 ### end nextcloud settings
2083 EOF
2084     if [[ ! -e $rcdir/config/secret ]]; then
2085       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2086     fi
2087     secret=$(cat $rcdir/config/secret)
2088
2089     rclogdir=/var/log/$rcbase
2090     rctmpdir=/var/tmp/$rcbase
2091     rcdb=/m/rc/$rcbase.sqlite
2092     # config from mailinabox
2093     i $rcdir/config/config.inc.php <<EOF
2094 <?php
2095 \$config = array();
2096 # debian creates this for us
2097 \$config['log_dir'] = '$rclogdir/';
2098 # debian also creates a temp dir, but it is under its install dir,
2099 # seems better to have our own.
2100 \$config['temp_dir'] = '$rctmpdir/';
2101 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2102 \$config['default_host'] = 'ssl://localhost';
2103 \$config['default_port'] = 993;
2104 \$config['imap_conn_options'] = array(
2105   'ssl'         => array(
2106      'verify_peer'  => false,
2107      'verify_peer_name'  => false,
2108    ),
2109  );
2110 \$config['imap_timeout'] = 15;
2111 \$config['smtp_server'] = 'tls://127.0.0.1';
2112 \$config['smtp_conn_options'] = array(
2113   'ssl'         => array(
2114      'verify_peer'  => false,
2115      'verify_peer_name'  => false,
2116    ),
2117  );
2118 \$config['product_name'] = 'webmail';
2119 \$config['des_key'] = '$secret';
2120 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2121 \$config['skin'] = 'elastic';
2122 \$config['login_autocomplete'] = 2;
2123 \$config['password_charset'] = 'UTF-8';
2124 \$config['junk_mbox'] = 'Spam';
2125 # disable builtin addressbook
2126 \$config['address_book_type'] = '';
2127 ?>
2128 EOF
2129
2130     m mkdir -p $rclogdir
2131     m chmod 750 $rclogdir
2132     m chown www-data:adm $rclogdir
2133     # note: subscribed to updates:
2134     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2135     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2136     m mkdir -p $rctmpdir /m/rc
2137     m chown -R www-data.www-data $rctmpdir /m/rc
2138     m chmod 750 $rctmpdir
2139     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2140     # todo: check for other mailinabox things
2141     m sudo -u www-data touch $rclogdir/errors.log
2142
2143     #### begin carddav install
2144     # This is the official roundcube carddav repo.
2145     # Install doc suggests downloading with composer, but that
2146     # didnt work, it said some ldap package for roundcube was missing,
2147     # but I dont want to download some extra ldap thing.
2148     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2149     verf=$rcdir/plugins/carddav/myversion
2150     upgrade=false
2151     install=false
2152     v=4.0.0
2153     if [[ -e $verf ]]; then
2154       if [[ $(cat $verf) != "$v" ]]; then
2155         install=true
2156         upgrade=true
2157       fi
2158     else
2159       install=true
2160     fi
2161     if $install; then
2162       m rm -rf $rcdir/plugins/carddav
2163       tmpd=$(mktemp -d)
2164       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2165       cd $rcdir/plugins
2166       tar xzf $tmpd/t.tgz
2167       rm -rf $tmpd
2168       m chown -R www-data:www-data $rcdir/plugins/carddav
2169       m cd $rcdir/plugins/carddav
2170       if $upgrade; then
2171         m sudo -u www-data composer-1.phar update --no-dev
2172       else
2173         m sudo -u www-data composer-1.phar install --no-dev
2174       fi
2175       m chown -R root:root $rcdir/plugins/carddav
2176       echo $v >$verf
2177     fi
2178
2179     # So, strangely, this worked in initial testing, but then
2180     # on first run it wouldn't show the existing contacts until
2181     # I went into the carddav settings and did "force immediate sync",
2182     # which seemed to fix things. Note, some of these settings
2183     # get initalized per/addressbook in the db, then need changing
2184     # there or through the settings menu.
2185
2186     # About categories, see https://www.davx5.com/tested-with/nextcloud
2187     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2188     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2189 <?php
2190 \$prefs['_GLOBAL']['hide_preferences'] = false;
2191 \$prefs['davserver'] = array(
2192 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2193   'name'         =>  'Main',
2194   'username'     =>  '%u', // login username
2195   'password'     =>  '%p', // login password
2196   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2197   'active'       =>  true,
2198   'readonly'     =>  false,
2199   'refresh_time' => '00:10:00',
2200   'fixed'        =>  array('username','password'),
2201   'use_categories' => false,
2202   'hide'        =>  false,
2203 );
2204 ?>
2205 EOF
2206     #### end carddav install
2207
2208     cd $rcdir/plugins
2209     if [[ ! -d html5_notifier ]]; then
2210       m git clone https://github.com/stremlau/html5_notifier
2211     fi
2212     cd $rcdir/plugins/html5_notifier
2213     m git pull --rebase
2214
2215     # todo: try out roundcube plugins: thunderbird labels
2216
2217     # Password changing plugin settings
2218     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2219 # following are from mailinabox
2220 $config['password_minimum_length'] = 8;
2221 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2222 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2223 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2224 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2225 $config['password_dovecotpw_with_method'] = true;
2226 EOF
2227     # so PHP can use doveadm, for the password changing plugin
2228     m usermod -a -G dovecot www-data
2229     m usermod -a -G mail $u
2230
2231     # so php can update passwords
2232     m chown www-data:dovecot /m/rc/users.sqlite
2233     m chmod 664 /m/rc/users.sqlite
2234
2235     # Run Roundcube database migration script (database is created if it does not exist)
2236     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2237     m chown www-data:www-data $rcdb
2238     m chmod 664 $rcdb
2239   done # end loop over domains and rcdirs
2240
2241   ### begin php setup for rc ###
2242   # Enable PHP modules.
2243   m phpenmod -v php mcrypt imap
2244   # dpkg says this is required
2245   m a2enmod proxy_fcgi setenvif
2246   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2247   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2248   m a2enconf $fpm
2249   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2250   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2251   m a2dismod php$phpver
2252   # according to /install, we should set date.timezone,
2253   # but that is dumb, the system already has the right zone in
2254   # $rclogdir/errors.log
2255   # todo: consider other settings in
2256   # /a/opt/mailinabox/setup/nextcloud.sh
2257   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2258 apc.enable_cli = 1
2259 EOF
2260
2261   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2262 date.timezone = "America/New_York"
2263 # for nextcloud
2264 upload_max_filesize = 2000M
2265 post_max_size = 2000M
2266 # install checker, nextcloud/settings/admin/overview
2267 memory_limit = 512M
2268 EOF
2269   m systemctl restart $fpm
2270   # dunno if reload/restart is needed
2271   m systemctl reload apache2
2272   # note bk backups are defined in crontab outside this file
2273   ### end php setup for rc ###
2274
2275 fi # end roundcube setup
2276
2277 # * nextcloud setup
2278
2279 if [[ $HOSTNAME == bk ]]; then
2280   # from install checker, nextcloud/settings/admin/overview and
2281   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2282   # curl from the web installer requirement, but i switched to cli
2283   # it recommends php-file info, but that is part of php7.3-common, already got installed
2284   # with roundcube.
2285   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2286
2287   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2288   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2289 [www]
2290 clear_env = no
2291 EOF
2292
2293   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2294     domain=${bkdomains[i]}
2295     ncdir=${ncdirs[i]}
2296     ncbase=${ncdir##*/}
2297     m cd /var/www
2298     if [[ ! -e $ncdir/index.php ]]; then
2299       # if we wanted to only install a specific version, use something like
2300       # file=latest-22.zip
2301       file=latest.zip
2302       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2303       m rm -rf nextcloud
2304       m unzip -q $file
2305       m rm -f $file
2306       m chown -R www-data.www-data nextcloud
2307       m mv nextcloud $ncdir
2308       m cd $ncdir
2309       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2310     fi
2311     # note, strange this happend where updater did not increment the version var,
2312     # mine was stuck on 20. I manually updated it.
2313     m cd $ncdir/config
2314     if [[ ! -e config.php-orig ]]; then
2315       m cp -a config.php config.php-orig
2316     fi
2317     cat config.php-orig - >tmp.php <<EOF
2318 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2319 \$CONFIG["mail_smtpmode"] = "sendmail";
2320 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2321 \$CONFIG["mail_smtpport"] = 25;
2322 \$CONFIG["mail_smtptimeout"] = 10;
2323 \$CONFIG["mail_smtpsecure"] = "";
2324 \$CONFIG["mail_smtpauth"] = false;
2325 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2326 \$CONFIG["mail_smtpname"] = "";
2327 \$CONFIG["mail_smtppassword"] = "";
2328 \$CONFIG["mail_domain"] = "$domain";
2329
2330 # https://github.com/nextcloud/user_external#readme
2331 # plus mailinabox example
2332 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2333
2334
2335 # based on installer check
2336 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2337 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2338
2339 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2340 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2341 \$CONFIG['trusted_domains'] = array (
2342         0 => '$domain',
2343     );
2344 #\$CONFIG[''] = '';
2345 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2346 var_export(\$CONFIG);
2347 fwrite(STDOUT, ";\n");
2348 EOF
2349     e running php tmp.php
2350     php tmp.php >config.php
2351     # leave in place for debugging
2352     #m rm -f tmp.php
2353     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2354     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2355     # user_external not compaible with nc 23
2356     for app in contacts calendar; do
2357       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2358         m sudo -u www-data php $ncdir/occ app:install $app
2359       fi
2360     done
2361     i /etc/systemd/system/$ncbase.service <<EOF
2362 [Unit]
2363 Description=ncup $ncbase
2364 After=multi-user.target
2365
2366 [Service]
2367 Type=oneshot
2368 ExecStart=/usr/local/bin/ncup $ncbase
2369 User=www-data
2370 IOSchedulingClass=idle
2371 CPUSchedulingPolicy=idle
2372 EOF
2373     i /etc/systemd/system/$ncbase.timer <<EOF
2374 [Unit]
2375 Description=ncup $ncbase timer
2376
2377 [Timer]
2378 OnCalendar=Daily
2379
2380 [Install]
2381 WantedBy=timers.target
2382 EOF
2383     systemctl enable --now $ncbase.timer
2384     i /usr/local/bin/ncup <<'EOFOUTER'
2385 #!/bin/bash
2386
2387 source /usr/local/lib/err
2388
2389 m() { printf "%s\n" "$*";  "$@"; }
2390 err-cleanup() {
2391   echo failed nextcloud update for $ncbase >&2
2392   # -odf or else systemd will kill the background delivery process
2393   # and the message will sit in the queue until the next queue run.
2394   exim -odf -t <<EOF
2395 To: alerts@iankelling.org
2396 From: www-data@$(hostname -f)
2397 Subject: failed nextcloud update for $ncbase
2398
2399 For logs, run: jr -u $ncbase
2400 EOF
2401 }
2402
2403 if [[ $(id -u -n) != www-data ]]; then
2404   echo error: running as wrong user: $(id -u -n), expected www-data
2405   exit 1
2406 fi
2407
2408 if [[ ! $1 ]]; then
2409   echo error: expected an arg, nextcloud relative base dir
2410   exit 1
2411 fi
2412
2413 ncbase=$1
2414 cd /var/www/$ncbase
2415 m php /var/www/$ncbase/updater/updater.phar -n
2416 # just being overly cautious
2417 sleep 3
2418 m php occ -n upgrade
2419 EOFOUTER
2420     chmod +x /usr/local/bin/ncup
2421
2422     mkdir -p /var/www/cron-errors
2423     chown www-data.www-data /var/www/cron-errors
2424     i /etc/cron.d/$ncbase <<EOF
2425 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2426 SHELL=/bin/bash
2427 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2428 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2429 EOF
2430
2431   done
2432 fi
2433
2434
2435 # * exim host conditional config
2436
2437 # ** exim certs
2438
2439 all_dirs=(/p/c/filesystem)
2440 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2441   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2442 done
2443 files=()
2444 for d in ${all_dirs[@]}; do
2445   f=$d/etc/exim4/passwd
2446   if [[ -e $f  ]]; then
2447     files+=($f)
2448   fi
2449   tmp=($d/etc/exim4/*.pem)
2450   if (( ${#tmp[@]} )); then
2451     files+=(${tmp[@]})
2452   fi
2453 done
2454
2455 if (( ${#files[@]} )); then
2456   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2457 fi
2458
2459
2460 # ** exim: auth
2461
2462 case $HOSTNAME in
2463   bk|je)
2464     # avoid accepting mail for invalid users
2465     # https://wiki.dovecot.org/LMTP/Exim
2466     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2467 deny
2468   message = invalid recipient
2469   domains = +local_domains
2470   !verify = recipient/callout=no_cache
2471 EOF
2472     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2473 dovecot_plain:
2474   driver = dovecot
2475   public_name = PLAIN
2476   server_socket = /var/run/dovecot/auth-client
2477   server_set_id = $auth1
2478 EOF
2479     ;;
2480 esac
2481 if $bhost_t; then
2482   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2483 # from 30_exim4-config_examples
2484 plain_server:
2485 driver = plaintext
2486 public_name = PLAIN
2487 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2488 server_set_id = $auth2
2489 server_prompts = :
2490 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2491 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2492 .endif
2493 EOF
2494 fi
2495
2496 # ** exim: main daemon use non-default config file
2497 case $HOSTNAME in
2498   bk|$MAIL_HOST)
2499     # to see the default comments in /etc/default/exim4:
2500     # s update-exim4defaults --force --init
2501     # which will overwrite any existing file
2502     i /etc/default/exim4 <<'EOF'
2503 QUEUERUNNER='combined'
2504 QUEUEINTERVAL='30m'
2505 COMMONOPTIONS='-C /etc/exim4/my.conf'
2506 UPEX4OPTS='-o /etc/exim4/my.conf'
2507 # i use epanic-clean for alerting if there are bad paniclog entries
2508 E4BCD_WATCH_PANICLOG='no'
2509 EOF
2510     # make exim be a nonroot setuid program.
2511     chown Debian-exim:Debian-exim /usr/sbin/exim4
2512     # needs guid set in order to become Debian-exim
2513     chmod g+s,u+s /usr/sbin/exim4
2514     # need this to avoid error on service reload:
2515     # 2022-08-07 18:44:34.005 [892491] pid 892491: SIGHUP received: re-exec daemon
2516     # 2022-08-07 18:44:34.036 [892491] cwd=/var/spool/exim4 5 args: /usr/sbin/exim4 -bd -q30m -C /etc/exim4/my.conf
2517     # 2022-08-07 18:44:34.043 [892491] socket bind() to port 25 for address (any IPv6) failed: Permission denied: waiting 30s before trying again (9 more tries)
2518     # note: the daemon gives up and dies after retrying those 9 times.
2519     # I came upon this by guessing and trial and error.
2520     setcap CAP_NET_BIND_SERVICE+ei /usr/sbin/exim4
2521     i /etc/exim4/trusted_configs <<'EOF'
2522 /etc/exim4/my.conf
2523 EOF
2524     ;;
2525   *)
2526     # default file
2527     i /etc/default/exim4 <<'EOF'
2528 QUEUERUNNER='combined'
2529 QUEUEINTERVAL='30m'
2530 EOF
2531     ;;
2532 esac
2533
2534 # ** exim non-root
2535
2536 case $HOSTNAME in
2537   bk|je|li)
2538     # no reason to expect it to ever be there.
2539     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2540     ;;
2541   *)
2542     dirs=()
2543     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2544       if [[ -d $d ]]; then
2545         dirs+=($d)
2546       fi
2547     done
2548     i /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2549 [Service]
2550 # see 56.2 Root privilege in exim spec
2551 AmbientCapabilities=CAP_NET_BIND_SERVICE
2552 # https://www.redhat.com/sysadmin/mastering-systemd
2553 # things that seem good and reasonabl.e
2554 PrivateTmp=yes
2555 ProtectHome=yes
2556 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2557 # this whole setting doesnt work. tried it with a newer systemd 250 though
2558 # an nspawn, and it worked there.
2559 InaccessiblePaths=${dirs[@]}
2560 # this gives us the permission denied error:
2561 # socket bind() to port 25 for address (any IPv6) failed: Permission denied
2562 # but we also have to set the file capabilities to avoid the error.
2563 #NoNewPrivileges=yes
2564 ProtectSystem=yes
2565
2566 # when we get newer systemd
2567 #ProtectDevices=yes
2568 EOF
2569     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2570 # see 56.2 Root privilege in exim spec
2571 deliver_drop_privilege = true
2572 EOF
2573     files=(
2574       300_exim4-config_real_local
2575       600_exim4-config_userforward
2576       700_exim4-config_procmail
2577       800_exim4-config_maildrop
2578       mmm_mail4root
2579     )
2580     for f in ${files[@]}; do
2581       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2582     done
2583     ;;
2584 esac
2585
2586 case $HOSTNAME in
2587
2588   # ** $MAIL_HOST|bk|je)
2589   $MAIL_HOST|bk|je)
2590
2591     echo|i /etc/exim4/conf.d/router/870_backup_local
2592
2593     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2594 # note: some things we don't set that are here by default because they are unused.
2595 dc_local_interfaces=''
2596 dc_eximconfig_configtype='internet'
2597 dc_localdelivery='dovecot_lmtp'
2598 EOF
2599     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2600 # recommended if dns is expected to work
2601 CHECK_RCPT_VERIFY_SENDER = true
2602 # default config comment says: If you enable this, you might reject legitimate mail,
2603 # but eggs has had this a long time, so that seems unlikely.
2604 CHECK_RCPT_SPF = true
2605 CHECK_RCPT_REVERSE_DNS = true
2606 CHECK_MAIL_HELO_ISSUED = true
2607
2608
2609 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2610 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2611
2612 # testing dmarc
2613 #dmarc_tld_file = /etc/public_suffix_list.dat
2614
2615 EOF
2616     ;;&
2617
2618   # ** $MAIL_HOST|bk)
2619   $MAIL_HOST|bk)
2620
2621
2622     # no clamav on je, it has 1.5g memory and clamav uses most of it
2623     i /etc/exim4/conf.d/clamav_data_acl <<'EOF'
2624 warn
2625 !hosts = +iank_trusted
2626 !authenticated = plain_server:login_server
2627 condition = ${if def:malware_name}
2628 remove_header = Subject:
2629 add_header = Subject: [Clamav warning: $malware_name] $h_subject
2630 log_message = heuristic malware warning: $malware_name
2631 EOF
2632
2633     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2634 # je.b8.nz will run out of memory with freshclam
2635 av_scanner = clamd:/var/run/clamav/clamd.ctl
2636 EOF
2637
2638     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2639 deny
2640   malware = */defer_ok
2641   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2642   message = This message was detected as possible malware ($malware_name).
2643 EOF
2644
2645     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2646 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2647 # smarthost config type, not sure.
2648 # failing message on mail-tester.com:
2649 # We check if there is a server (A Record) behind your hostname kd.
2650 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2651 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2652 # and this one seemed appropriate from grepping config.
2653 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2654 # mail to kd, so this should basically be a name that no host has as their
2655 # canonical hostname since the actual host sits behind a nat and changes.
2656 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2657 # I used this to avoid sender verification, didnt work but it still
2658 # makes sense based on the spec.
2659 hosts_treat_as_local = defaultnn.b8.nz
2660
2661 # Outside nn, we get the default cert location from a debian macro,
2662 # and the cert file is put in place by a certbot hook.
2663 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2664 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2665 EOF
2666
2667     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2668 gnusmarthost:
2669   debug_print = "R: smarthost for $local_part@$domain"
2670   driver = manualroute
2671   domains = ! +local_domains
2672 # send most mail through eggs, helps fsfs sender reputation.
2673 # uncomment and optionally move to 188 file to send through my own servers again
2674   senders = *@gnu.org
2675   transport = smarthost_dkim
2676   route_list = * fencepost.gnu.org::587 byname
2677   host_find_failed = ignore
2678   same_domain_copy_routing = yes
2679   no_more
2680 EOF
2681
2682     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2683 10.173.8.1 defaultnn.b8.nz
2684 EOF
2685     ;;&
2686   # ** $MAIL_HOST)
2687   $MAIL_HOST)
2688
2689     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2690 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2691 # use vpn transport. lower priority so it overrides the default route.
2692 # Use this in case our vpn fails, we dont send anything without it.
2693 .ifdef DCconfig_internet
2694 dnslookup_vpn:
2695   debug_print = "R: dnslookup for $local_part@$domain"
2696   driver = dnslookup
2697   domains = ! +local_domains
2698   transport = remote_smtp_vpn
2699   same_domain_copy_routing = yes
2700   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
2701   no_more
2702 .endif
2703 EOF
2704
2705
2706     # note on backups: I used to do an automatic sshfs and restricted
2707     # permissions to a specific directory on the remote server, /bu/mnt,
2708     # which required using a dedicated user, but realized smtp will be
2709     # more reliable and less fuss. If I ever need that again, see the
2710     # history of this file, and bum in brc2.
2711
2712     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2713 ### router/900_exim4-config_local_user
2714 #################################
2715
2716 # todo, it would be nice to save sent email too,
2717 # but its not so important, they still exist in my head
2718
2719 backup_redir:
2720 driver = redirect
2721 domains = +local_domains
2722 # b is just an arbirary short string
2723 data = b@eximbackup.b8.nz
2724 # note, to test this, i could temporarily allow testignore.
2725 # alerts avoids potential mail loop. root is already
2726 # redirected earlier, so that is just being overly cautious.
2727 local_parts = ! root : ! testignore : ! alerts
2728 unseen = true
2729
2730 backup_copy:
2731 driver = manualroute
2732 domains = eximbackup.b8.nz
2733 transport = backup_remote
2734 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2735 # note changes here also require change in passwd.client
2736 route_list = * eximbackup.b8.nz
2737 same_domain_copy_routing = yes
2738 errors_to = alerts@iankelling.org
2739 no_more
2740 EOF
2741
2742
2743     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2744 backup_remote:
2745   driver = smtp
2746   multi_domain
2747 .ifdef IGNORE_SMTP_LINE_LENGTH_LIMIT
2748   message_linelength_limit = 1000000
2749 .endif
2750   hosts_require_auth = *
2751   hosts_try_auth = *
2752   envelope_to_add
2753   # manual return path because we want it to be the envelope sender
2754   # we got not the one we are using in this smtp transport
2755   headers_add = "Return-path: $sender_address"
2756 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2757   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2758 .endif
2759 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2760   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2761 .endif
2762 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2763   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2764 .endif
2765 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2766   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2767 .endif
2768 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2769   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2770 .endif
2771 .ifdef REMOTE_SMTP_HELO_DATA
2772   helo_data=REMOTE_SMTP_HELO_DATA
2773 .endif
2774 .ifdef TLS_DH_MIN_BITS
2775 tls_dh_min_bits = TLS_DH_MIN_BITS
2776 .endif
2777 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2778 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2779 .endif
2780 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2781 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2782 .endif
2783 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2784   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2785 .endif
2786 EOF
2787
2788
2789     # this avoids some error. i cant remember what. todo:
2790     # test it out and document why/if its needed.
2791     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2792     # mail.fsf.org
2793     # *.posteo.de
2794     # EOF
2795
2796     # cron email from smarthost hosts will automatically be to
2797     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2798     # case that doesn't work, we still want to accept that mail, but not
2799     # from any host except the smarthosts. local_hostnames and this rule
2800     # is for that purpose.
2801     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2802 deny
2803   !authenticated = *
2804   domains = +local_hostnames
2805   message = no relay
2806 EOF
2807     echo|i /etc/exim4/conf.d/router/880_universal_forward
2808
2809
2810     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2811 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
2812 EOF
2813
2814     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2815     # and also have mail.iankelling.org whitelisted as a relay domain.
2816     # I could avoid that if I changed this to submit to 587 with a
2817     # password like a standard mua.
2818     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2819 # ian: save a copy of sent mail. i thought of other ways to
2820 # do this, for example, to only save sent mail that is not sent
2821 # from my mail client which saves a copy by default, but in the
2822 # end, it seems simplest to turn that off. We want to save
2823 # external mail sent by smarthosts.
2824 sentarchive:
2825   driver = redirect
2826   domains = ! +local_domains
2827   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2828   data    = vojdedIdNejyebni@b8.nz
2829   unseen
2830
2831 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2832 # replaced DCsmarthost with hostname
2833 fsfsmarthost:
2834   debug_print = "R: smarthost for $local_part@$domain"
2835   driver = manualroute
2836   domains = ! +local_domains
2837   senders = *@fsf.org
2838   transport = remote_smtp_smarthost
2839   route_list = * mail.fsf.org::587 byname
2840   host_find_failed = ignore
2841   same_domain_copy_routing = yes
2842   no_more
2843
2844 posteosmarthost:
2845   debug_print = "R: smarthost for $local_part@$domain"
2846   driver = manualroute
2847   domains = ! +local_domains
2848   senders = *@posteo.net
2849   transport = remote_smtp_smarthost
2850   route_list = * posteo.de::587 byname
2851   host_find_failed = ignore
2852   same_domain_copy_routing = yes
2853   no_more
2854 EOF
2855
2856     # Greping /etc/exim4, unqualified mails this would end up as
2857     # a return path, so it should go somewhere we will see.
2858     # The debconf output about mailname is as follows:
2859     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2860     # name.
2861     # This name will also be used by other programs. It should be the single, fully
2862     # qualified domain name (FQDN).
2863     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2864     # this option would be example.org.
2865     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2866     echo iankelling.org > /etc/mailname
2867
2868
2869     # mail.iankelling.org so local imap clients can connect with tls and
2870     # when they happen to not be local.
2871     # todo: this should be 10.8.0.4
2872
2873     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2874 # note: i put nn.b8.nz into bind for good measure
2875 10.173.8.2 nn.b8.nz mx.iankelling.org
2876 EOF
2877
2878     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2879     # weve configured this file in dnsmasq if we are using it.
2880     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2881 server=/mx.iankelling.org/127.0.1.1
2882 EOF
2883     # I used to use debconf-set-selections + dpkg-reconfigure,
2884     # which then updates this file
2885     # but the process is slower than updating it directly and then I want to set other things in
2886     # update-exim4.conf.conf, so there's no point.
2887     # The file is documented in man update-exim4.conf,
2888     # except the man page is not perfect, read the bash script to be sure about things.
2889
2890     # The debconf questions output is additional documentation that is not
2891     # easily accessible, but super long, along with the initial default comment in this
2892     # file, so I've saved that into ./mail-notes.conf.
2893     #
2894     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2895     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2896 # man page: is used to build the local_domains list, together with "localhost"
2897 # this is duplicated in a later router.
2898 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2899 EOF
2900
2901
2902     # dmarc. not used currently
2903     f=/etc/cron.daily/refresh-dmarc-tld-file
2904     cat >$f <<'EOF'
2905 #!/bin/bash
2906 cd /etc
2907 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2908 EOF
2909     m chmod 755 $f
2910
2911     ;;
2912   # ** bk
2913   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2914   bk)
2915
2916     echo|i /etc/exim4/conf.d/rcpt_local_acl
2917     echo|i /etc/exim4/conf.d/router/880_universal_forward
2918
2919     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2920 10.173.8.2 nn.b8.nz
2921 EOF
2922
2923     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2924 s,/etc/default/exim4,/etc/default/exim4in,g
2925 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2926 s,(^[ #]*Provides:).*,\1 exim4in,
2927 s,(^[ #]*NAME=).*,\1"exim4in",
2928 EOF
2929     chmod +x /etc/init.d/exim4in
2930     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2931 [Unit]
2932 # needed to continually restart
2933 StartLimitIntervalSec=0
2934
2935 [Service]
2936 Restart=always
2937 # time to sleep before restarting a service
2938 RestartSec=20
2939 EOF
2940
2941     i /etc/default/exim4in <<'EOF'
2942 # defaults but no queue runner and alternate config dir
2943 QUEUERUNNER='no'
2944 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2945 UPEX4OPTS='-d /etc/myexim4'
2946 EOF
2947
2948     echo bk.b8.nz > /etc/mailname
2949     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2950 # man page: is used to build the local_domains list, together with "localhost"
2951 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
2952 EOF
2953
2954     ;;
2955   # ** je
2956   je)
2957     echo je.b8.nz > /etc/mailname
2958     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2959 dc_other_hostnames='je.b8.nz'
2960 EOF
2961     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2962     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2963     echo|i /etc/exim4/conf.d/rcpt_local_acl
2964     echo|i /etc/exim4/conf.d/router/880_universal_forward
2965     ;;
2966   # ** not MAIL_HOST|bk|je
2967   *)
2968     # this one should be removed for all non mail hosts, but
2969     # bk and je never become mail_host
2970     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2971
2972     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2973     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2974     echo|i /etc/exim4/conf.d/rcpt_local_acl
2975     echo|i /etc/exim4/conf.d/router/890_backup_copy
2976     echo|i /etc/exim4/conf.d/main/000_local-nn
2977     echo|i /etc/exim4/conf.d/clamav_data_acl
2978
2979
2980     if $bhost_t; then
2981       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2982 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2983 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2984 # so we can maintiain the originals of the backups.
2985 # we wouldnt want this if we were dealing with any other
2986 # local deliveries, but we sent all others to the smarthost
2987 # which then strips the headers.
2988 envelope_to_remove = false
2989 return_path_remove = false
2990 EOF
2991     fi
2992
2993     # catches things like cronjob email
2994     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2995 universal_forward:
2996   driver = redirect
2997   domains = +local_domains
2998   data = alerts@iankelling.org
2999 EOF
3000
3001
3002     for unit in ${nn_progs[@]}; do
3003       f=/etc/systemd/system/$unit.service.d/nn.conf
3004       rm -fv $f
3005     done
3006
3007     # dont i dont care if defaultnn section gets left, it wont
3008     # get used.
3009     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
3010     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
3011
3012     # note: condition duplicated at else
3013     if $bhost_t; then
3014       install -d /bu
3015       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
3016       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
3017         chown -R Debian-exim:Debian-exim /bu/md
3018       fi
3019       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
3020 # modified debian maildir transport
3021 backup_maildir:
3022   driver = appendfile
3023   directory = /bu/md
3024   delivery_date_add
3025   # note, no return path or envelope added
3026   maildir_format
3027   directory_mode = 0700
3028   mode = 0644
3029   mode_fail_narrower = false
3030 EOF
3031
3032       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
3033 ### router/900_exim4-config_local_user
3034 #################################
3035
3036 backup_local:
3037   debug_print = "R: local_user for $local_part@$domain"
3038   driver = accept
3039   domains = eximbackup.b8.nz
3040   transport = backup_maildir
3041 EOF
3042
3043       # Bind to wghole to receive mailbackup.
3044       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
3045       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3046 dc_other_hostnames='eximbackup.b8.nz'
3047 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
3048 EOF
3049
3050       # wghole & thus exim will fail to start without internet connectivity.
3051       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
3052 [Unit]
3053 StartLimitIntervalSec=0
3054
3055 [Service]
3056 Restart=always
3057 RestartSec=20
3058 EOF
3059
3060     else  # if $bhost_t; then
3061       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3062 # Note: If theres like a temporary problem where mail gets sent to
3063 # one of these hosts, if exim isnt listening, it will be a temporary error
3064 # instead of a permanent 5xx.
3065 dc_local_interfaces='127.0.0.1;::1'
3066 EOF
3067       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
3068     fi
3069     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3070 dc_eximconfig_configtype='smarthost'
3071 dc_smarthost='$smarthost'
3072 EOF
3073
3074     hostname -f |i /etc/mailname
3075     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3076 # The manpage incorrectly states this will do header rewriting, but
3077 # that only happens if we have dc_hide_mailname is set.
3078 dc_readhost='iankelling.org'
3079 # Only used in case of bounces.
3080 dc_localdelivery='maildir_home'
3081 EOF
3082     ;;
3083 esac
3084
3085
3086
3087
3088 # ** $MAILHOST|bk, things that belong at the end
3089 case $HOSTNAME in
3090   $MAIL_HOST|bk)
3091     # config for the non-nn exim
3092     m rsync -ra --delete --delete-excluded --exclude=/conf.d/main/000_local-nn /etc/exim4/ /etc/myexim4
3093     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3094 # this makes it easier to see which exim is doing what
3095 log_file_path = /var/log/exim4/my%s
3096 EOF
3097
3098
3099
3100     cat >/etc/logrotate.d/myexim <<'EOF'
3101 /var/log/exim4/mymain /var/log/exim4/myreject {
3102         daily
3103         missingok
3104         rotate 1000
3105         delaycompress
3106         notifempty
3107         nocreate
3108 }
3109 /var/log/exim4/mypanic {
3110         size 10M
3111         missingok
3112         rotate 10
3113         compress
3114         delaycompress
3115         notifempty
3116         nocreate
3117 }
3118 EOF
3119
3120     # If we ever wanted to have a separate spool,
3121     # we could do it like this.
3122     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3123     # spool_directory = /var/spool/myexim4
3124     # EOF
3125     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3126 dc_eximconfig_configtype='smarthost'
3127 dc_smarthost='nn.b8.nz'
3128 EOF
3129     ;;&
3130   bk)
3131
3132     # config for the non-nn exim
3133     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
3134 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3135 EOF
3136     ;;
3137   $MAIL_HOST)
3138     # for bk, we have a exim4in.service that will do this for us.
3139     m update-exim4.conf -d /etc/myexim4
3140     ;;
3141 esac
3142
3143 # * spool dir setup
3144
3145 # ** bind mount setup
3146 # put spool dir in directory that spans multiple distros.
3147 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3148 #
3149 dir=/nocow/exim4
3150 sdir=/var/spool/exim4
3151 # we only do this if our system has $dir
3152
3153 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3154 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3155 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3156 # so, im trying a bind mount to get rid of that.
3157 if [[ -e /nocow ]]; then
3158   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3159     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3160   fi
3161   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3162 [Unit]
3163 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3164 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3165 After=local-fs.target
3166
3167 [Service]
3168 ExecStartPre=/usr/local/bin/exim-nn-iptables
3169 EOF
3170   if ! mountpoint -q $sdir; then
3171     stopifactive exim4 exim4in
3172     if [[ -L $sdir ]]; then
3173       m rm $sdir
3174     fi
3175     if [[ ! -e $dir && -d $sdir ]]; then
3176       m mv $sdir $dir
3177     fi
3178     if [[ ! -d $sdir ]]; then
3179       m mkdir $sdir
3180       m chmod 000 $sdir # only want it to be used when its mounted
3181     fi
3182     m mount $sdir
3183   fi
3184 fi
3185
3186
3187
3188 # ** exim/spool uid setup
3189 # i have the spool directory be common to distro multi-boot, so
3190 # we need the uid to be the same. 608 cuz it's kind of in the middle
3191 # of the free system uids.
3192 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3193 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3194 if [[ ! $uid ]]; then
3195   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3196   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3197     --no-create-home --disabled-login --force-badname Debian-exim
3198 elif [[ $uid != 608 ]]; then
3199   stopifactive exim4 exim4in
3200   m usermod -u 608 Debian-exim
3201   m groupmod -g 608 Debian-exim
3202   m usermod -g 608 Debian-exim
3203   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3204   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3205 fi
3206
3207 # * start / stop services
3208
3209 reifactive dnsmasq nscd
3210
3211 if $reload; then
3212   m systemctl daemon-reload
3213 fi
3214
3215 # checking bhost_t is redundant, but could help us catch errors.
3216 if $bhost_t || [[ -e /etc/wireguard/wghole.conf ]]; then
3217   # todo: in mail-setup, we have a static list of backup hosts, not *y
3218   m systemctl --now enable wg-quick@wghole
3219 fi
3220
3221 sysd-prom-fail-install epanicclean
3222 m systemctl --now enable epanicclean
3223
3224 case $HOSTNAME in
3225   je)
3226     /a/exe/web-conf apache2 je.b8.nz
3227     ;;
3228   bk)
3229     /a/exe/web-conf apache2 mail2.iankelling.org
3230     ;;
3231 esac
3232
3233 m /a/bin/ds/mail-cert-cron -1
3234 sre mailcert.timer
3235
3236 case $HOSTNAME in
3237   $MAIL_HOST|bk)
3238     m systemctl --now enable mailnn mailnnroute
3239     ;;&
3240   $MAIL_HOST)
3241     # we use dns to start wg
3242     if $reload; then
3243       sre unbound
3244     else
3245       m systemctl --now enable unbound
3246     fi
3247     ;;&
3248   $MAIL_HOST|bk)
3249     # If these have changes, id rather manually restart it, id rather
3250     # not restart and cause temporary errors
3251     if $reload; then
3252       sre $vpnser
3253     else
3254       m systemctl --now enable $vpnser
3255     fi
3256     if ! systemctl is-active clamav-daemon >/dev/null; then
3257       m systemctl --now enable clamav-daemon
3258       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3259       if [[ $out ]]; then
3260         reload=true
3261       fi
3262
3263       # note, this will cause paniclog entries because it takes like 45
3264       # seconds for clamav to start, i use ./epanic-clean to remove
3265       # them.
3266     fi
3267     ;;&
3268   $MAIL_HOST|bk|je)
3269     # start spamassassin/dovecot before exim.
3270     sre dovecot spamassassin
3271     # need to wait a bit before restarting exim, else I
3272     # get a paniclog entry like: spam acl condition: all spamd servers failed
3273     sleep 3
3274     m systemctl --now enable mailclean.timer
3275     ;;&
3276   $MAIL_HOST)
3277     # < 2.1 (eg: in t9), uses a different data format which required manual
3278     # migration. dont start if we are running an old version.
3279     if dpkg --compare-versions "$(dpkg -s radicale | awk '$1 == "Version:" { print $2 }')" ge 2.1; then
3280       m systemctl --now enable radicale
3281     fi
3282     ;;&
3283 esac
3284
3285 # for debugging dns issues
3286 case $HOSTNAME in
3287   je|bk)
3288     systemctl enable --now logrotate-fast.timer
3289     ;;
3290 esac
3291
3292 # last use of $reload happens in previous block
3293 rm -f /var/local/mail-setup-reload
3294
3295
3296 case $HOSTNAME in
3297   $MAIL_HOST|bk|je|li)
3298     # on li, these are never started, except $vpnser
3299     :
3300     ;;
3301   *)
3302     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3303     ;;
3304 esac
3305
3306 sre exim4
3307
3308 case $HOSTNAME in
3309   $MAIL_HOST)
3310     m systemctl --now enable mailbindwatchdog
3311     ;;
3312   *)
3313     soff mailbindwatchdog
3314     ;;
3315 esac
3316
3317
3318 case $HOSTNAME in
3319   bk) sre exim4in ;;
3320 esac
3321
3322 # * mail monitoring / testing
3323
3324 # note, to test clamav, send an email with body that only contains
3325 # https://en.wikipedia.org/wiki/EICAR_test_file
3326 # which set malware_name to Eicar-Signature
3327 case $HOSTNAME in
3328   $MAIL_HOST|bk|je)
3329     # note: cronjob "ian" also does some important monitoring
3330     # todo: this will sometimes cause an alert because mailtest-check will run
3331     # before we have setup network namespace and spamassassin
3332     i /etc/cron.d/mailtest <<EOF
3333 SHELL=/bin/bash
3334 PATH=/usr/bin:/bin:/usr/local/bin
3335 MAILTO=daylert@iankelling.org
3336 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3337 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3338 # if a bounce happened yesterday, dont let it slip through the cracks
3339 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3340 EOF
3341
3342
3343     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3344       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3345     i /etc/systemd/system/mailtest-check.service <<'EOF'
3346 [Unit]
3347 Description=mailtest-check
3348 After=local-fs.target
3349 StartLimitIntervalSec=0
3350
3351 [Service]
3352 Type=simple
3353 ExecStart=/usr/local/bin/mailtest-check slow
3354 Restart=always
3355 RestartSec=60
3356
3357 [Install]
3358 WantedBy=graphical.target
3359 EOF
3360     sysd-prom-fail-install mailtest-check
3361     sre mailtest-check
3362     ;;&
3363   $MAIL_HOST)
3364     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3365     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3366
3367     cat >>/etc/cron.d/mailtest <<EOF
3368 # 10 am friday
3369 0   10 * * 5  root echo "weekly alert. You are not in the matrix."
3370 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3371 EOF
3372     ;;&
3373   bk)
3374     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3375     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3376     # We dont need to send from different addresses to the same
3377     # address. this breaks down our nice elegant logic of building up
3378     # froms and tos , so I just handle expertpath in a special case
3379     # below and set the to: to be testignore@zroe.org.  If we did sent
3380     # that way, it would also mess up our mailtest-check logic that
3381     # finds which messages to check.
3382     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3383     # that would become 2 messages and we'd only check 1.
3384     ;;&
3385   je)
3386     test_froms=(testignore@je.b8.nz)
3387     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3388     ;;&
3389   $MAIL_HOST|bk|je)
3390
3391     # Dont put these test messages into the sent folder or else it will
3392     # overwhelm it, plus i dont want to save a copy at all.
3393     rm -f /etc/exim4/ignore-sent
3394     for t in ${test_tos[@]}; do
3395       echo $t >> /etc/exim4/ignore-sent
3396     done
3397
3398     cat >/usr/local/bin/send-test-forward <<'EOF'
3399 #!/bin/bash
3400 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3401 olds=(
3402 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3403 )
3404 if (( ${#olds[@]} )); then
3405   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3406 fi
3407 EOF
3408     for test_from in ${test_froms[@]}; do
3409
3410       test_to=${test_tos[0]}
3411       for t in ${test_tos[@]:1}; do
3412         test_to+=", $t"
3413       done
3414       case $test_from in
3415         testignore@expertpathologyreview.com)
3416           test_to=testignore@zroe.org
3417           ;;
3418       esac
3419
3420       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3421 /usr/sbin/exim -odf -f $test_from -t <<EOF
3422 From: $test_from
3423 To: $test_to
3424 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3425
3426 /usr/local/bin/send-test-forward
3427 EOF
3428 EOFOUTER
3429     done
3430     m chmod +x /usr/local/bin/send-test-forward
3431     ;;
3432   *)
3433     soff mailtest-check.service
3434     rm -fv /etc/cron.d/mailtest \
3435        /var/lib/prometheus/node-exporter/mailtest-check.prom* \
3436        /var/local/cron-errors/check-remote-mailqs*
3437     ;;
3438 esac
3439
3440
3441
3442 # * misc
3443 m sudo -u $u mkdir -p /home/$u/.cache
3444 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3445 while (($#)); do
3446   target=$1
3447   f=$2
3448   shift 2
3449   if [[ ! -L $f ]]; then
3450     if [[ -e $f ]]; then
3451       rm -rf $f
3452     fi
3453     m sudo -u $u ln -sf -T $target $f
3454   fi
3455 done
3456
3457
3458 # /etc/alias setup is debian specific, and exim postinst script sets up
3459 # an /etc/alias from root to the postmaster, based on the question
3460 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3461 # root, or there was no preexisting aliases file. postfix won\'t set up
3462 # a root to $postmaster alias if it\'s already installed. Easiest to
3463 # just set it ourselves.
3464
3465 # debconf question for postmaster:
3466 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3467 # to the user account of the actual system administrator.
3468 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3469 # recommended.
3470 # Note that postmaster\'s mail should be read on the system to which it is directed,
3471 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3472 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3473 # force local delivery.
3474 # Multiple user names need to be separated by spaces.
3475 # Root and postmaster mail recipient:
3476
3477 m exit 0
3478 :
3479
3480 # Local Variables:
3481 # eval: (outline-minor-mode)
3482 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3483 # End:
3484 # this is combined with defining outline-level in init.el