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: check new macro DKIM_TIMESTAMPS
   7
   8 # todo: check if REMOTE_SMTP_INTERFACE or REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE can simplify my or fsfs config
   9
  10 # todo: max line length macro changed in t11. look into it
  11 # todo: check that all macros we use are still valid in t11
  12
  13 # todo: setup an alert for bouncing test emails.
  14
  15 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  16 # think about making bounces go from the original address.
  17
  18 # todo: add a prometheus alert for dovecot.
  19
  20 # todo: handle errors like this:
  21 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  22 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  23 #eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago
  24 #Debian-+  1954     1  0 36231 11560   4 Apr02 ?        00:40:25 /usr/sbin/exim4 -bd -q30m
  25 #Debian-+ 23058  1954  0 36821 10564   0 20:38 ?        00:00:00 /usr/sbin/exim4 -bd -q30m
  26
  27 #  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.
  28 #  todo: consider hardening cups listening on 0.0.0.0
  29 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  30
  31 # todo:  hosts should only allow external mail that is authed and
  32 # destined for backup route. it is a minor issue since traffic is
  33 # limited to the wghole network.
  34
  35 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  36 # instead of a simple rejection like it should.
  37
  38 # todo: run mailping test after running, or otherwise
  39 # clear out terminal alert
  40
  41 # todo: disable postgrey
  42
  43 # todo: in testforward-check, we should also look
  44
  45 # todo: test that bounces dont help create valid mailtest-check
  46
  47 # todo: move mail stuff in distro-end into this file
  48
  49 # todo: consider rotating dkim & publishing key so every past email I sent
  50 # isnt necessarily signed
  51
  52 # todo: consider how to get clamav out of Debian-exim group
  53 # so it cant read/write the whole mail spool, for better
  54 # security.
  55
  56 # todo: create a cronjob to update or warn on expiring dnssec keys
  57
  58 # todo: we should test failed mail daily or so
  59 # failed cronjob, failed sysd-log-once,
  60 # a local bounce from a cronjob, a local bounce
  61 # to a bad remote address, perhaps a local failure
  62 # when the sending daemon is down.
  63 # And send an alert email if no alerts have been sent
  64 # in 2 or 3 days or something. todo, test cron mail on li.
  65
  66 # todo: look at mailinabox extra dns records, note these changelogs:
  67 # - 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.
  68 # - 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.
  69 #
  70
  71 # todo: mailtest-check failure on remote hosts is not going to alert me.
  72 # sort that out.
  73 # todo: test mail failure as well as success.
  74 #
  75 # todo: validate that mailtest-check is doing dnsbl checks.
  76
  77 # background: I want to run exim in a network namespace so it can send
  78 # and receive through a vpn. This is needed so it can do ipv6, because
  79 # outside the namespace if we dont have ipv6, to send ipv6 through the
  80 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  81 # long time, it was fine, but it causes various pains, like increased
  82 # latency, increased recaptcha because my ip is from a data center, just
  83 # various issues I dont want on all the time. The problem with the
  84 # namespace is that all kinds of programs want to invoke exim, but they
  85 # wont be in the namespace. I could replace exim with a wrapper that
  86 # jumps into the namespace, i tried that, it works fine.  One remaining
  87 # problem was that I would have needed to hook into exim upgrades to
  88 # move exim and replace it with my wrapper script. Also, my script to
  89 # join the namespace is not super reliable because it uses a pgrep.
  90 # Instead, I should have created a systemd service for a process that
  91 # will never die and just writes its pid somewhere convenient.
  92 # That implementation
  93 # is below here:
  94 #
  95 # sudoers:
  96 # user ALL=(ALL) /usr/sbin/exim4
  97 #
  98 # move exim4 to eximian, use this script for exim4:
  99 #
 100 # #!/bin/bash
 101 # if ip a show veth1-mail &>/dev/null; then
 102 #   /usr/sbin/eximian "$@"
 103 #   exit
 104 # fi
 105 # dosudo=false
 106 # if [[ $USER && $USER != root ]]; then
 107 #   dosudo=true
 108 # fi
 109 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 110 # if $dosudo; then
 111 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 112 # else
 113 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 114 # fi
 115 # ## end script
 116 #
 117 # an alternate solution: there is a small setguid program for
 118 # network namespaces in my bookmarks.
 119 #
 120 # However, the solution I went with is: have 2 exim
 121 # configs. A nonstandard location for the daemon that runs
 122 # in the namespace. For all other invocations, it uses
 123 # the default config location, which is altered to be
 124 # in a smarthost config which sends mail to the deaemon.
 125 #
 126 # I have a bash function, enn to invoke exim like the daemon is running.
 127 # and mailbash to just enter its network namespace.
 128
 129 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 130
 131 shopt -s nullglob
 132
 133 if [[ -s /usr/local/lib/err ]]; then
 134   source /usr/local/lib/err
 135 elif [[ -s /a/bin/errhandle/err ]]; then
 136   source /a/bin/errhandle/err
 137 else
 138   echo "no err tracing script found"
 139   exit 1
 140 fi
 141 source /a/bin/distro-functions/src/identify-distros
 142 source /a/bin/distro-functions/src/package-manager-abstractions
 143
 144 # has nextcloud_admin_pass in it
 145 f=/p/c/machine_specific/$HOSTNAME/mail
 146 if [[ -e $f ]]; then
 147   # shellcheck source=/p/c/machine_specific/bk/mail
 148   source $f
 149 fi
 150
 151
 152 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 153
 154 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 155 u=$(id -nu 1000)
 156
 157
 158 usage() {
 159   cat <<EOF
 160 Usage: ${0##*/} anything_here_to_debug
 161 Setup exim4 & dovecot & related things
 162
 163 -h|--help  Print help and exit.
 164 EOF
 165   exit $1
 166 }
 167
 168 # debug output if we pass any arg
 169 if (( $# )); then
 170   set -x
 171 fi
 172
 173
 174 ####### instructions for icedove #####
 175 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 176 # then click advanced so it accepts it.
 177 # we could also just use 127.0.0.1 with no ssl
 178 #
 179 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 180 # background: dovecot does not yet have ocsp stapling support
 181 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 182 #
 183 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 184 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 185 # fetching mail settings: folder poll frequency 10 minutes.
 186 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 187 #######
 188
 189
 190 # * perstent password instructions
 191 # Note: for cert cron, we need to manually run first to accept known_hosts
 192
 193 # # exim passwords:
 194 # # for hosts which have all private files I just use the same user
 195 # # for other hosts, each one get\'s their own password.
 196 # # for generating secure pass, and storing for server too:
 197 # f=$(mktemp)
 198 # host=tp
 199 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 200 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 201 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 202 # #reference: exim4_passwd_client(5)
 203 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 204 # mkdir -p $dir
 205 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 206 # # then run this script
 207
 208 # # dovecot password, i just need 1 as I\'m the only user
 209 # mkdir /p/c/filesystem/etc/dovecot
 210 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 211
 212 ####### end perstent password instructions ######
 213
 214
 215 # * dkim dns
 216 # # Remove 1 level of comments in this section, set the domain var
 217 # # for the domain you are setting up, then run this and copy dns settings
 218 # # into dns.
 219 # domain=iankelling.org
 220 # c /p/c/filesystem/etc/exim4
 221 # # this has several bugs addressed in comments, but it was helpful
 222 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 223
 224 # openssl genrsa -out $domain-private.pem 2048
 225 # # Then, to get the public key strings to put in bind:
 226
 227 # # selector is needed for having multiple keys for one domain.
 228 # # I dun do that, so just use a static one: li
 229 # # Debadmin page does not have v=, fastmail does, and this
 230 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 231 # # https://www.ietf.org/rfc/rfc6376.txt
 232 # # Join and print all but first and last line.
 233 # # last line: swap hold & pattern, remove newlines, print.
 234 # # lines 2+: append to hold space
 235 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 236 # cat <<EOF
 237 # a._domainkey.$domain  TXT     (
 238 # "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')" )
 239 # EOF
 240 # # sed explanation: skip the first few lines, then put them into the hold space, then
 241 # # on the last line, back to the patern space, remove the newlines, then add a newline
 242 # # at the last char - 240, because bind txt records need strings <=255 chars,
 243 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 244 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 245
 246 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 247
 248 # * dmarc dns
 249
 250 # # 2017-02 dmarc policies:
 251 # # host -t txt _dmarc.gmail.com
 252 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 253 # # there were articles claiming gmail would be  changing
 254 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 255 # # expected to cause problems
 256 # # with a few old mailing lists, copying theirs for now.
 257 #
 258 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 259
 260 # * other dns
 261
 262 # # 2017-02 spf policies:
 263 # # host -t txt lists.fedoraproject.org
 264 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 265 # # i include fastmail\'s settings, per their instructions,
 266 # # and follow their policy. In mail in a box, or similar instructions,
 267 # # I\'ve seen recommended to not use a restrictive policy.
 268
 269 # # to check if dns has updated, you do
 270 # host -a mesmtp._domainkey.$domain
 271
 272 # # mx records,
 273 # # setting it to iankelling.org would work the same, but this
 274 # # is more flexible, I could change where mail.iankelling.org pointed.
 275 # cat <<'EOF'
 276 # mx records, 2 records each, for * and empty domain
 277 # pri 10 mail.iankelling.org
 278 # EOF
 279
 280 # # dnssec
 281 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 282
 283 # * functions & constants
 284
 285 pre="${0##*/}:"
 286 m() { printf "$pre %s\n"  "$*"; "$@"; }
 287 e() { printf "$pre %s\n"  "$*"; }
 288 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 289
 290 reload=false
 291 # This file is so if we fail in the middle and rerun, we dont lose state
 292 if [[ -e /var/local/mail-setup-reload ]]; then
 293   reload=true
 294 fi
 295 i() { # install file
 296   local tmp tmpdir dest="$1"
 297   local base="${dest##*/}"
 298   local dir="${dest%/*}"
 299   if [[ $dir != "$base" ]]; then
 300     # dest has a directory component
 301     mkdir -p "$dir"
 302   fi
 303   ir=false # i result
 304   tmpdir=$(mktemp -d)
 305   cat >$tmpdir/"$base"
 306   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 307   if [[ $tmp ]]; then
 308     printf "%s\n" "$tmp"
 309     ir=true
 310     if [[ $dest == /etc/systemd/system/* ]]; then
 311       touch /var/local/mail-setup-reload
 312       reload=true
 313     fi
 314   fi
 315   rm -rf $tmpdir
 316 }
 317 setini() {
 318   key="$1" value="$2" section="$3"
 319   file="/etc/radicale/config"
 320   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 321 }
 322 soff () {
 323   for service; do
 324     # ignore services that dont exist
 325     if systemctl cat $service &>/dev/null; then
 326       m systemctl disable --now $service
 327     fi
 328   done
 329 }
 330 sre() {
 331   for service; do
 332     m systemctl restart $service
 333     m systemctl enable $service;
 334   done
 335 }
 336 mailhost() {
 337   [[ $HOSTNAME == "$MAIL_HOST" ]]
 338 }
 339 e() { printf "%s\n" "$*"; }
 340 reifactive() {
 341   for service; do
 342     if systemctl is-active $service >/dev/null; then
 343       m systemctl restart $service
 344     fi
 345   done
 346 }
 347 stopifactive() {
 348   for service; do
 349     if systemctl is-active $service >/dev/null; then
 350       m systemctl stop $service
 351     fi
 352   done
 353 }
 354
 355 mxhost=mx.iankelling.org
 356 mxport=587
 357
 358 # old setup. left as comment for example
 359 # mxhost=mail.messagingengine.com
 360 # mxport=587
 361 # forward=ian@iankelling.org
 362
 363 smarthost="$mxhost::$mxport"
 364 uhome=$(eval echo ~$u)
 365
 366 # Somehow on one machine, a file got written with 664 perms.
 367 # just being defensive here.
 368 umask 0022
 369
 370 source /a/bin/bash_unpublished/source-state
 371 if [[ ! $MAIL_HOST ]]; then
 372   err "\$MAIL_HOST not set"
 373 fi
 374
 375 bhost_t=false
 376 case $HOSTNAME in
 377   $MAIL_HOST) : ;;
 378   kd|frodo|x2|x3|kw|sy|bo)
 379     bhost_t=true
 380     ;;
 381 esac
 382
 383
 384 # * Install universal packages
 385
 386
 387 # installs epanicclean iptables-exim ip6tables-exim
 388 /a/bin/ds/install-my-scripts
 389
 390 if [[ $(debian-codename-compat) == bionic ]]; then
 391   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 392 Package: spamassassin sa-compile spamc
 393 Pin: release n=focal,o=Ubuntu
 394 Pin-Priority: 500
 395 EOF
 396 fi
 397
 398 # light version of exim does not have sasl auth support.
 399 # note: for bitfolk hosts, unbound has important config with conflink.
 400 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 401
 402 # note: pyzor debian readme says you need to run some initialization command
 403 # but its outdated.
 404 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 405 case $HOSTNAME in
 406   je) : ;;
 407   # not included due to using wireguard: openvpn
 408   *) pi wget git unzip iptables ;;
 409 esac
 410 # bad packages that sometimes get automatically installed
 411 pu openresolv resolvconf
 412
 413 soff openvpn
 414
 415
 416 if [[ $(debian-codename) == etiona ]]; then
 417   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 418   # so running iptables as part of openvpn startup wont work. This should do it.
 419   pi iptables-persistent
 420   cat >/etc/iptables/rules.v6 <<'EOF'
 421 *mangle
 422 COMMIT
 423 *nat
 424 COMMIT
 425 EOF
 426   # load it now.
 427   m ip6tables -S >/dev/null
 428 fi
 429
 430 # our nostart pi fails to avoid enabling
 431
 432
 433 # * Mail clean cronjob
 434
 435 i /etc/systemd/system/mailclean.timer <<'EOF'
 436 [Unit]
 437 Description=Run mailclean daily
 438
 439 [Timer]
 440 OnCalendar=monthly
 441
 442 [Install]
 443 WantedBy=timers.target
 444 EOF
 445
 446 i /etc/systemd/system/mailclean.service <<EOF
 447 [Unit]
 448 Description=Delete and archive old mail files
 449 After=multi-user.target
 450
 451 [Service]
 452 User=$u
 453 Type=oneshot
 454 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 455 EOF
 456
 457 # * postgrey
 458
 459
 460 i /etc/default/postgrey <<'EOF'
 461 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 462 EOF
 463
 464 # * clamav
 465
 466 m usermod -a -G Debian-exim clamav
 467
 468 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 469 [Service]
 470 ExecStartPre=-/bin/mkdir -p /var/run/clamav
 471 ExecStartPre=/bin/chown clamav /var/run/clamav
 472 EOF
 473
 474 # * mail vpn config
 475
 476 # old.
 477 #vpnser=mailvpn.service
 478 # note: this hangs if it cant resolv the endpoint. we
 479 # want it to just retry in the background. i just use a static ip instead.
 480 #
 481 # Note: at least on t10, on reboot, the service fails to come up according to systemd, but
 482 # in reality it is up and working, then it tries to restart infinitely, and fails
 483 # because it detects that the interface exists.
 484 #
 485 # failing output:
 486 #
 487 # Aug 02 21:59:27 sy wg-quick[2092]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 488 # Aug 02 21:59:27 sy wg-quick[2248]: [#] iptables-restore -n
 489 # 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?
 490 # Aug 02 21:59:27 sy wg-quick[2259]: [#] iptables-restore -n
 491 # 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?
 492 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=4/NOPERMISSION
 493
 494
 495 # successful output.
 496 # Aug 03 14:12:47 sy wg-quick[711336]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 497 # Aug 03 14:12:47 sy wg-quick[711384]: [#] iptables-restore -n
 498 # Aug 03 14:12:47 sy wg-quick[711336]: [#] ping -w10 -c1 10.8.0.1 ||:
 499 # Aug 03 14:12:47 sy wg-quick[711389]: PING 10.8.0.1 (10.8.0.1) 56(84) bytes of data.
 500 # 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
 501 # Aug 03 14:12:47 sy wg-quick[711389]: --- 10.8.0.1 ping statistics ---
 502 # Aug 03 14:12:47 sy wg-quick[711389]: 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 503 # Aug 03 14:12:47 sy wg-quick[711389]: rtt min/avg/max/mdev = 72.993/72.993/72.993/0.000 ms
 504 # Aug 03 14:12:47 sy systemd[1]: Finished WireGuard via wg-quick(8) for wgmail.
 505 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 506 # Aug 02 21:59:27 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 507 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Scheduled restart job, restart counter is at 1.
 508 # Aug 02 21:59:47 sy systemd[1]: Stopped WireGuard via wg-quick(8) for wgmail.
 509 # Aug 02 21:59:47 sy systemd[1]: Starting WireGuard via wg-quick(8) for wgmail...
 510 # Aug 02 21:59:47 sy wg-quick[3424]: wg-quick: `wgmail' already exists
 511 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=1/FAILURE
 512 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 513 # Aug 02 21:59:47 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 514
 515
 516 # According to iptables -S and iptables -t nat -S,
 517 # there are no modifications to iptables rules on a succsfull run,
 518 # and
 519
 520 vpnser=wg-quick@wgmail.service
 521
 522 case $HOSTNAME in
 523   $MAIL_HOST)
 524     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 525     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 526     ;;&
 527   bk)
 528     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 529     ;;&
 530   *)
 531     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 532     if [[ -d $d ]]; then
 533       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 534     fi
 535     ;;
 536 esac
 537
 538 case $HOSTNAME in
 539   li) : ;;
 540   *)
 541     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 542 [Unit]
 543 Requires=mailnn.service
 544 JoinsNamespaceOf=mailnn.service
 545 BindsTo=mailnn.service
 546 StartLimitIntervalSec=0
 547
 548 [Service]
 549 PrivateNetwork=true
 550 # i dont think we need any of these, but it doesnt hurt to stay consistent
 551 BindPaths=$bindpaths
 552
 553 Restart=on-failure
 554 RestartSec=20
 555 EOF
 556     ;;
 557 esac
 558
 559
 560 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 561 i /etc/systemd/system/mailvpn.service <<EOF
 562 [Unit]
 563 Description=OpenVPN tunnel for mail
 564 After=syslog.target network-online.target mailnn.service
 565 Wants=network-online.target
 566 Documentation=man:openvpn(8)
 567 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 568 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 569 # needed to continually restatr
 570 JoinsNamespaceOf=mailnn.service
 571 BindsTo=mailnn.service
 572 StartLimitIntervalSec=0
 573
 574 [Service]
 575 Type=notify
 576 RuntimeDirectory=openvpn-client
 577 RuntimeDirectoryMode=0710
 578 WorkingDirectory=/etc/openvpn/client
 579 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 580 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 581 LimitNPROC=10
 582 # DeviceAllow=/dev/null rw
 583 # DeviceAllow=/dev/net/tun rw
 584 PrivateNetwork=true
 585 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 586 # because of
 587 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 588 # there is a workaround there, but i dont think its really worth it,
 589 # the mail server is fine with a static dns anyways.
 590 # This thread is also interesting,
 591 # https://github.com/slingamn/namespaced-openvpn/issues/7
 592 # todo: the iptables rule at the bottom could be useful to prevent
 593 # dns from leaking in my network namespaced vpn.
 594 # I also like the idea of patching systemd-resolved so it
 595 # will listen on other interfaces, but its not worth my time.
 596 BindPaths=$bindpaths
 597 Restart=always
 598 # time to sleep before restarting a service
 599 RestartSec=20
 600
 601 [Install]
 602 WantedBy=multi-user.target
 603 EOF
 604
 605 i /etc/systemd/system/mailnnroute.service <<'EOF'
 606 [Unit]
 607 Description=Network routing for mailnn
 608 After=syslog.target network-online.target mailnn.service
 609 Wants=network-online.target
 610 JoinsNamespaceOf=mailnn.service
 611 BindsTo=mailnn.service
 612 StartLimitIntervalSec=0
 613
 614 [Service]
 615 Type=simple
 616 RemainAfterExit=true
 617 PrivateNetwork=true
 618 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 619 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 620 Restart=always
 621 RestartSec=20
 622
 623
 624 [Install]
 625 WantedBy=multi-user.target
 626 EOF
 627
 628 #
 629 i /etc/systemd/system/mailnn.service <<'EOF'
 630 [Unit]
 631 Description=Network Namespace for mail vpn service that will live forever and cant fail
 632 After=syslog.target network-online.target
 633 Wants=network-online.target
 634
 635 [Service]
 636 Type=simple
 637 PrivateNetwork=true
 638 ExecStart=/bin/sleep infinity
 639
 640 [Install]
 641 WantedBy=multi-user.target
 642 EOF
 643
 644 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 645 [Unit]
 646 Description=Watchdog to restart services relying on systemd-resolved dir
 647 After=syslog.target network-online.target
 648 Wants=network-online.target
 649 BindsTo=mailnn.service
 650
 651 [Service]
 652 Type=simple
 653 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 654 Restart=always
 655 # time to sleep before restarting a service
 656 RestartSec=10
 657
 658 [Install]
 659 WantedBy=multi-user.target
 660 EOF
 661
 662
 663
 664 # old service name
 665 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 666
 667 # We use a local unbound because systemd-resolved wont accept our
 668 # request, it will only listen to 127.0.0.53 in the main network
 669 # namespace, and rejected feature requests to change that (although I
 670 # could change the code and recompile), but anyways, that could answer
 671 # with things specific to the lan that aren't applicable in this
 672 # namespace, and since unbound is a recursive resolver, it means we just
 673 # use our own ip against dnsbl rate limits.
 674 #
 675 # If we ever notice this change, chattr +i on it
 676 # trust-ad is used in t10+, glibc 2.31
 677
 678 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 679 nameserver 127.0.0.1
 680 options edns0 trust-ad
 681 EOF
 682
 683 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 684 nameserver 127.0.0.53
 685 options edns0 trust-ad
 686 EOF
 687
 688
 689 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 690 nameserver 10.173.8.1
 691 options edns0 trust-ad
 692 EOF
 693
 694 # this is just a bug fix for trisquel.
 695 f=/etc/apparmor.d/usr.sbin.unbound
 696 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 697 if ! grep -qFx "$line" $f; then
 698   badline="/usr/sbin/unbound {"
 699   if ! grep -qFx "$badline" $f; then
 700     err expected line in $f not found
 701   fi
 702   sed -i "s,^$badline$,$line," $f
 703   if systemctl is-active apparmor &>/dev/null; then
 704     m systemctl reload apparmor
 705   fi
 706 fi
 707
 708 # note: anything added to nn_progs needs corresponding rm
 709 # down below in the host switch
 710 nn_progs=(exim4)
 711 if mailhost; then
 712   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 713   # Its in the nn so remote clients can connect to it.
 714   nn_progs+=(spamassassin dovecot)
 715 fi
 716
 717 case $HOSTNAME in
 718   $MAIL_HOST)
 719     # todo, should this be after vpn service
 720     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 721 [Unit]
 722 After=mailnn.service
 723 JoinsNamespaceOf=mailnn.service
 724 BindsTo=mailnn.service
 725 StartLimitIntervalSec=0
 726
 727 [Service]
 728 PrivateNetwork=true
 729 # note the nsswitch bind is actually not needed for bk, but
 730 # its the same file so it does no harm.
 731 BindPaths=$bindpaths
 732
 733 Restart=always
 734 RestartSec=20
 735 EOF
 736
 737     # sooo, there are a few ways to get traffic from the mail network
 738     # namespace to go over the wghole.
 739     #
 740     #1: unify the mail vpn and wghole
 741     # into 1 network.  this seems simple and logical, so I'm doing it.
 742     # One general downside is tying things together, if I need to mess
 743     # with one thing, it breaks the other. Oh well for now.
 744     #
 745     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 746     #
 747     # 3. We can setup the routing to happen on li, which seemed like I
 748     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 749     # wghole clients, but I think that is kind of hacky and breaks ipv4
 750     # routing within the mailvpn, it happened to work just because exim
 751     # prefers ipv6 and that was also available in the mailvpn.
 752     #
 753     # 4. Put the hole interface into the mail network namespace. This
 754     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 755     # vpn routing and establishes a direct connection.  I only use the
 756     # hole vpn for randomish things, it should be fine to join the mail
 757     # nn for that. There should be some way to fix the routing issue
 758     # by doing manual routing, but that doesn't seem like a good use of time.
 759     # relevant:
 760     # https://www.wireguard.com/netns/#
 761     #
 762     # for wireguard debugging
 763     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 764     # dmesg -w
 765
 766     ;;&
 767   $MAIL_HOST|bk)
 768     for unit in ${nn_progs[@]}; do
 769       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 770 [Unit]
 771
 772 # Wants appears better than requires because with requires,
 773 # if the vpnser fails to start, this service won't get run at
 774 # all, even if the vpnser starts on an automatic restart.
 775
 776 Wants=$vpnser
 777 After=network.target mailnn.service $vpnser
 778 JoinsNamespaceOf=mailnn.service
 779 BindsTo=mailnn.service
 780 StartLimitIntervalSec=0
 781
 782 [Service]
 783 PrivateNetwork=true
 784 # note the nsswitch bind is actually not needed for bk, but
 785 # its the same file so it does no harm.
 786 BindPaths=$bindpaths
 787
 788 Restart=always
 789 RestartSec=20
 790 EOF
 791     done
 792     ;;
 793   *)
 794     for unit in exim4 spamassassin dovecot unbound; do
 795       f=/etc/systemd/system/$unit.service.d/nn.conf
 796       if [[ -s $f ]]; then
 797         rm -fv $f
 798         reload=true
 799       fi
 800     done
 801     ;;
 802 esac
 803
 804 # * wghole (another mail vpn)
 805
 806 if $bhost_t; then
 807   i /etc/systemd/system/wg-quick@wghole.service.d/override.conf <<'EOF'
 808 [Unit]
 809 StartLimitIntervalSec=0
 810
 811 [Service]
 812 Restart=on-failure
 813 RestartSec=20
 814 EOF
 815 fi
 816
 817 # * spamassassin config
 818 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 819 # see exim spec
 820 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 821 EOF
 822 if $ir; then
 823   m sysctl -p
 824 fi
 825
 826 i /etc/spamassassin/mylocal.cf <<'EOF'
 827 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 828
 829 # /usr/share/doc/exim4-base/README.Debian.gz:
 830 #   SpamAssassin's default report should not be used in a add_header
 831 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 832 #   warning "BAD HEADER SECTION, Improper folded header field made up
 833 #   entirely of whitespace".) This is a safe, terse alternative:
 834 clear_report_template
 835 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 836 uridnsbl_skip_domain iankelling.org
 837 uridnsbl_skip_domain amnimal.ninja
 838 uridnsbl_skip_domain expertpathologyreview.com
 839 uridnsbl_skip_domain zroe.org
 840 EOF
 841
 842 # 2020-10-19 remove old file. remove this when all hosts updated
 843 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 844
 845 i /etc/default/spamassassin <<'EOF'
 846 # defaults plus debugging flags for an issue im having
 847 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 848 PIDFILE="/var/run/spamd.pid"
 849 # my additions
 850 NICE="--nicelevel 15"
 851 CRON=1
 852 EOF
 853 #####   end spamassassin config
 854
 855
 856 # * Update mail cert
 857
 858
 859 ## needed only for openvpn mail vpn.
 860 # if [[ -e /p/c/filesystem ]]; then
 861 #   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 862 #   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 863 #   # after my internet was down for a bit:
 864 #   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 865 #   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 866 # fi
 867
 868 # With openvpn, I didn't get around to persisting the openvpn
 869 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 870 # manually get the cert. However, we aren't using openvpn anymore, so it
 871 # is commented out.
 872 #
 873 # case $HOSTNAME in
 874 #   bk)
 875 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 876 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 877 #       exit 1
 878 #     fi
 879 #     ;;
 880 # esac
 881
 882 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 883
 884 i /etc/systemd/system/mailcert.service <<'EOF'
 885 [Unit]
 886 Description=Mail cert rsync
 887 After=multi-user.target
 888
 889 [Service]
 890 Type=oneshot
 891 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 892 EOF
 893 i /etc/systemd/system/mailcert.timer <<'EOF'
 894 [Unit]
 895 Description=Run mail-cert once a day
 896
 897 [Timer]
 898 OnCalendar=daily
 899
 900 [Install]
 901 WantedBy=timers.target
 902 EOF
 903
 904
 905 wghost=${HOSTNAME}wg.b8.nz
 906 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 907   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 908           certonly --manual --preferred-challenges=dns \
 909           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 910           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 911           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 912 fi
 913
 914 # * fail2ban
 915
 916 # todo: test that these configs actually work, eg run
 917 # s iptables-exim -S
 918 # and see someone is banned.
 919
 920 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 921     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 922 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 923 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 924
 925 # Fail2Ban configuration file
 926 #
 927 # Author: Daniel Black
 928 #
 929 # This is a included configuration file and includes the definitions for the iptables
 930 # used in all iptables based actions by default.
 931 #
 932 # The user can override the defaults in iptables-common.local
 933 #
 934 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 935 #       made config file IPv6 capable (see new section Init?family=inet6)
 936
 937 [INCLUDES]
 938
 939 after = iptables-blocktype.local
 940         iptables-common.local
 941 # iptables-blocktype.local is obsolete
 942
 943 [Definition]
 944
 945 # Option:  actionflush
 946 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 947 # Values:  CMD
 948 #
 949 actionflush = <iptables> -F f2b-<name>
 950
 951
 952 [Init]
 953
 954 # Option:  chain
 955 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 956 #          added
 957 # Values:  STRING  Default: INPUT
 958 chain = INPUT
 959
 960 # Default name of the chain
 961 #
 962 name = default
 963
 964 # Option:  port
 965 # Notes.:  specifies port to monitor
 966 # Values:  [ NUM | STRING ]  Default:
 967 #
 968 port = ssh
 969
 970 # Option:  protocol
 971 # Notes.:  internally used by config reader for interpolations.
 972 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 973 #
 974 protocol = tcp
 975
 976 # Option:  blocktype
 977 # Note:    This is what the action does with rules. This can be any jump target
 978 #          as per the iptables man page (section 8). Common values are DROP
 979 #          REJECT, REJECT --reject-with icmp-port-unreachable
 980 # Values:  STRING
 981 blocktype = REJECT --reject-with icmp-port-unreachable
 982
 983 # Option:  returntype
 984 # Note:    This is the default rule on "actionstart". This should be RETURN
 985 #          in all (blocking) actions, except REJECT in allowing actions.
 986 # Values:  STRING
 987 returntype = RETURN
 988
 989 # Option:  lockingopt
 990 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 991 #          running concurrently and causing irratic behavior.  -w was introduced
 992 #          in iptables 1.4.20, so might be absent on older systems
 993 #          See https://github.com/fail2ban/fail2ban/issues/1122
 994 # Values:  STRING
 995 lockingopt = -w
 996
 997 # Option:  iptables
 998 # Notes.:  Actual command to be executed, including common to all calls options
 999 # Values:  STRING
1000 iptables = /usr/local/bin/iptables-exim <lockingopt>
1001
1002
1003 [Init?family=inet6]
1004
1005 # Option:  blocktype (ipv6)
1006 # Note:    This is what the action does with rules. This can be any jump target
1007 #          as per the iptables man page (section 8). Common values are DROP
1008 #          REJECT, REJECT --reject-with icmp6-port-unreachable
1009 # Values:  STRING
1010 blocktype = REJECT --reject-with icmp6-port-unreachable
1011
1012 # Option:  iptables (ipv6)
1013 # Notes.:  Actual command to be executed, including common to all calls options
1014 # Values:  STRING
1015 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
1016 EOF
1017
1018 i /etc/fail2ban/jail.d/exim.local <<'EOF'
1019 [exim]
1020 enabled  = true
1021 port     = 25,587
1022 filter   = exim
1023 banaction = iptables-exim
1024
1025 # 209.51.188.13 = mail.fsf.org
1026 # 2001:470:142::13 = mail.fsf.org
1027 # 209.51.188.92 = eggs.gnu.org
1028 # 2001:470:142:3::10 = eggs.gnu.org
1029 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
1030 # 10.173.8.1 = non-nn net
1031 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
1032 EOF
1033 if $ir; then
1034   m systemctl restart fail2ban
1035 fi
1036
1037 # * common exim4 config
1038
1039
1040 ## old, not using forward files anymore
1041 rm -fv $uhome/.forward /root/.forward
1042
1043
1044 # Make all system users be aliases. preventative
1045 # prevents things like cron mail for user without alias
1046 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
1047   if [[ ! $user ]]; then
1048     continue
1049   fi
1050   if ! grep -q "^$user:" /etc/aliases; then
1051     echo "$user: root" |m tee -a /etc/aliases
1052   fi
1053 done
1054
1055
1056 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
1057   case $HOSTNAME in
1058     $MAIL_HOST)
1059       sed -i "/^user:/d" /etc/aliases
1060       ;;
1061     *)
1062       if ! grep -q "^$user:" /etc/aliases; then
1063         echo "$user: root" |m tee -a /etc/aliases
1064       fi
1065       ;;
1066   esac
1067 done
1068
1069
1070 . /a/bin/bash_unpublished/priv-mail-setup
1071
1072
1073 m gpasswd -a iank adm #needed for reading logs
1074
1075 ### make local bounces go to normal maildir
1076 # local mail that bounces goes to /Maildir or /root/Maildir
1077 dirs=(/m/md/bounces/{cur,tmp,new})
1078 m mkdir -p ${dirs[@]}
1079 m chown iank:iank /m /m/md
1080 m ln -sfT /m/md /m/iank
1081 m chmod 771 /m /m/md
1082 m chown -R $u:Debian-exim /m/md/bounces
1083 m chmod 775 ${dirs[@]}
1084 m usermod -a -G Debian-exim $u
1085 for d in /Maildir /root/Maildir; do
1086   if [[ ! -L $d ]]; then
1087     m rm -rf $d
1088   fi
1089   m ln -sf -T /m/md/bounces $d
1090 done
1091
1092 # dkim, client passwd file
1093 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1094 f=/p/c/filesystem/etc/exim4/passwd.client
1095 if [[ -e $f ]]; then
1096   files+=($f)
1097 fi
1098 if (( ${#files[@]} )); then
1099   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1100     ${files[@]} /etc/exim4
1101 fi
1102
1103 # By default, only 10 days of logs are kept. increase that.
1104 # And dont compress, I look back at logs too often and
1105 # dont need the annoyance of decompressing them all the time.
1106 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1107 files=(/var/log/exim4/*.gz)
1108 if (( ${#files[@]} )); then
1109   gunzip ${files[@]}
1110 fi
1111
1112 ## disabled. not using .forward files, but this is still interesting
1113 ## for reference.
1114 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1115 # # i only need .forwards, so just doing that one.
1116 # cd /etc/exim4/conf.d/router
1117 # b=userforward_higher_priority
1118 # # replace the router name so it is unique
1119 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1120 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1121
1122 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1123
1124 # alerts is basically the postmaster address
1125 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1126 \$a root: alerts@iankelling.org
1127 /^root:/d
1128 EOF
1129
1130 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1131 ncsoft@zroe.org graceq2323@gmail.com hE
1132 EOF
1133
1134 # old name
1135 rm -fv /etc/exim4/conf.d/retry/37_retry
1136
1137 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1138 # Retry fast for my own domains
1139 iankelling.org * F,1d,4m;F,14d,1h
1140 amnimal.ninja * F,1d,4m;F,14d,1h
1141 expertpathologyreview.com * F,1d,4m;F,14d,1h
1142 je.b8.nz * F,1d,4m;F,14d,1h
1143 zroe.org * F,1d,4m;F,14d,1h
1144 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1145
1146 # The spec says the target domain will be used for temporary host errors,
1147 # but i've found that isn't correct, the hostname is required
1148 # at least sometimes.
1149 nn.b8.nz * F,1d,4m;F,14d,1h
1150 defaultnn.b8.nz * F,1d,4m;F,14d,1h
1151 mx.iankelling.org * F,1d,4m;F,14d,1h
1152 bk.b8.nz * F,1d,4m;F,14d,1h
1153 eggs.gnu.org * F,1d,4m;F,14d,1h
1154 fencepost.gnu.org * F,1d,4m;F,14d,1h
1155
1156 # afaik our retry doesnt need this, but just using everything
1157 mx.amnimal.ninja * F,1d,4m;F,14d,1h
1158 mx.expertpathologyreview.com * F,1d,4m;F,14d,1h
1159
1160
1161 mail.fsf.org * F,1d,15m;F,14d,1h
1162 EOF
1163
1164
1165 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1166
1167 # separate file so without quoted EOF for convenience
1168 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1169 # normally empty, I set this so I can set the envelope address
1170 # when doing mail redelivery to invoke filters. Also allows
1171 # me exiqgrep and stuff.
1172 MAIN_TRUSTED_GROUPS = $u
1173 EOF
1174
1175 cd /etc/exim4
1176 {
1177   for f in *-private.pem; do
1178     echo ${f%-private.pem}
1179   done
1180 } | i /etc/exim4/conf.d/my-dkim-domains
1181
1182 if grep -Fq REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS \
1183         /etc/exim4/conf.d/transport/10_exim4-config_transport-macros; then
1184   cat >/etc/exim4/conf.d/transport/11_iank <<'EOF'
1185 # This unsets the default macro defined in on t11 in
1186 # /etc/exim4/conf.d/transport/10_exim4-config_transport-macros
1187 # It seems like a very odd choice that this has become
1188 # the default in t11. Normal smarthost clients use username/password
1189 # auth. Oh well.
1190 REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS ==
1191 EOF
1192 else
1193   rm -f /etc/exim4/conf.d/transport/11_iank
1194 fi
1195
1196 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1197 MAIN_TLS_ENABLE = true
1198
1199 # require tls connections for all smarthosts
1200 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1201
1202 # debian exim config added this in 2016 or so?
1203 # it's part of the smtp spec, to limit lines to 998 chars
1204 # but a fair amount of legit mail does not adhere to it. I don't think
1205 # this should be default, like it says in
1206 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1207 # todo: the bug for introducing this was about headers, but
1208 # the fix maybe is for all lines? one says gmail rejects, the
1209 # other says gmail does not reject. figure out and open a new bug.
1210 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1211
1212 # more verbose logs. used to use +all, but made it less for more efficiency.
1213 MAIN_LOG_SELECTOR = -tls_cipher -tls_certificate_verified +pid +received_recipients +received_sender +sender_on_delivery +return_path_on_delivery +msg_id_created +subject +address_rewrite +smtp_confirmation
1214
1215 # Based on spec, seems like a good idea to be nice.
1216 smtp_return_error_details = true
1217
1218 # default is 10. when exim has been down for a bit, fsf mailserver
1219 # will do a big send in one connection, then exim decides to put
1220 # the messages in the queue instead of delivering them, to avoid
1221 # spawning too many delivery processes. This is the same as the
1222 # fsfs value. And the corresponding one for how many messages
1223 # to send out in 1 connection remote_max_parallel = 256
1224 smtp_accept_queue_per_connection = 500
1225
1226
1227 DKIM_CANON = relaxed
1228 DKIM_SELECTOR = li
1229
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{$domain}{+local_domains} }\
1267   } {no}{yes}}
1268
1269
1270 # enable 587 in addition to the default 25, so that
1271 # i can send mail where port 25 is firewalled by isp
1272 daemon_smtp_ports = 25 : 587
1273 # default of 25, can get stuck when catching up on mail
1274 smtp_accept_max = 400
1275 smtp_accept_reserve = 100
1276 smtp_reserve_hosts = +iank_trusted
1277
1278 # Rules that make receiving more liberal should be on backup hosts
1279 # so that we dont reject mail accepted by MAIL_HOST
1280 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
1281 EOF
1282
1283 if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show exim4)" ge 4.94; then
1284   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1285 # In t11, we cant do the old anymore because this is tainted data used in a file lookup.
1286 # /usr/share/doc/exim4/NEWS.Debian.gz suggests to use lookups to untaint data.
1287 DKIM_DOMAIN = ${lookup {${domain:$rh_from:}}lsearch,ret=key{/etc/exim4/conf.d/my-dkim-domains}}
1288 EOF
1289 else
1290   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1291 # From comments in
1292 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1293 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1294 # There could be some circumstance when the
1295 # from: isnt our domain, but the envelope sender is
1296 # and so still want to sign, but I cant think of any case.
1297 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1298 EOF
1299 fi
1300
1301 rm -fv /etc/exim4/rcpt_local_acl # old path
1302
1303 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1304 # This acl already exists in rcpt, this just makes it more widespread.
1305 # See the comment there for its rationale. The reason it needs to be
1306 # more widespread is that I've turned on sender verification, but cron
1307 # emails can fail sender verification since I may be in a network that
1308 # doesn't have my local dns.
1309 accept
1310   authenticated = *
1311
1312 # i setup a local programs smtp to mail.iankelling.org, this
1313 # skips sender verification for it.
1314 accept
1315   hosts = 10.173.8.1
1316 EOF
1317
1318 rm -fv /etc/exim4/data_local_acl # old path
1319
1320 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1321 # Except for the "condition =", this was
1322 # a comment in the check_data acl. The comment about this not
1323 # being suitable has been changed in newer exim versions. The only thing
1324 # related I found was to
1325 # add the condition =, cuz spamassassin has problems with big
1326 # messages and spammers don't bother with big messages,
1327 # but I've increased the size from 10k
1328 # suggested in official docs, and 100k in the wiki example because
1329 # those docs are rather old and I see a 110k spam message
1330 # pretty quickly looking through my spam folder.
1331
1332 warn
1333   !hosts = +iank_trusted
1334   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1335
1336 warn
1337   !hosts = +iank_trusted
1338   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1339   !authenticated = plain_server:login_server
1340   condition = ${if < {$message_size}{5000K}}
1341   spam = Debian-exim:true
1342   add_header = X-Spam_score_int: $spam_score_int
1343   add_header = X-Spam_score: $spam_score
1344   add_header = X-Spam_bar: $spam_bar
1345   add_header = X-Spam_report: $spam_report
1346   add_header = X-Spam_action: $spam_action
1347
1348
1349 #accept
1350 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1351 #  dmarc_status = reject:quarantine
1352 #  add_header = Reply-to: dmarctest@iankelling.org
1353
1354 EOF
1355
1356
1357 # old file
1358 rm -fv /etc/exim4/conf.d/router/8{8,9}0_backup_copy /etc/exim4/conf.d/router/865_backup_redir
1359
1360 # It is important for this to exist everywhere except in MAIL_HOST
1361 # non-nn config. Previously, just had it in the nn-config on MAIL_HOST,
1362 # but that is a problem if we change mail host and still have something
1363 # in the queue which was destined for this router, but hosts were
1364 # unreachable, the routers will be reevaluated on the next retry.
1365 i /etc/exim4/conf.d/router/170_backup_copy <<EOF
1366 ### router/900_exim4-config_local_user
1367 #################################
1368
1369 backup_copy:
1370 driver = manualroute
1371 domains = eximbackup.b8.nz
1372 transport = backup_remote
1373 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
1374 # note changes here also require change in passwd.client
1375 route_list = * eximbackup.b8.nz
1376 same_domain_copy_routing = yes
1377 errors_to = alerts@iankelling.org
1378 no_more
1379 EOF
1380
1381
1382 # exim4-config transports are the same as default except for
1383 # message_linelength_limit = 2097152
1384 #
1385 # TODO: copy the defaults into their own file, and setup a cronjob so
1386 # that if file.dpkg-dist shows up, and it is different, we get an alert.
1387
1388 i /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp_smarthost <<'EOF'
1389 ### transport/30_exim4-config_remote_smtp_smarthost
1390 #################################
1391
1392 # This transport is used for delivering messages over SMTP connections
1393 # to a smarthost. The local host tries to authenticate.
1394 # This transport is used for smarthost and satellite configurations.
1395
1396 remote_smtp_smarthost:
1397   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1398   driver = smtp
1399   message_linelength_limit = 2097152
1400   multi_domain
1401   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1402         {\
1403         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1404         }\
1405         {} \
1406       }
1407 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1408   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1409 .endif
1410 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1411   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1412 .endif
1413 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1414   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1415 .endif
1416 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1417   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1418 .endif
1419 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1420   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1421 .endif
1422 .ifdef REMOTE_SMTP_RETURN_PATH
1423   return_path = REMOTE_SMTP_RETURN_PATH
1424 .endif
1425 .ifdef REMOTE_SMTP_HELO_DATA
1426   helo_data=REMOTE_SMTP_HELO_DATA
1427 .endif
1428 .ifdef TLS_DH_MIN_BITS
1429 tls_dh_min_bits = TLS_DH_MIN_BITS
1430 .endif
1431 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1432 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1433 .endif
1434 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1435 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1436 .endif
1437 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1438   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1439 .endif
1440 .ifdef REMOTE_SMTP_SMARTHOST_PROTOCOL
1441   protocol = REMOTE_SMTP_SMARTHOST_PROTOCOL
1442 .endif
1443 EOF
1444
1445 i /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp <<'EOF'
1446 ### transport/30_exim4-config_remote_smtp
1447 #################################
1448 # This transport is used for delivering messages over SMTP connections.
1449
1450 remote_smtp:
1451   debug_print = "T: remote_smtp for $local_part@$domain"
1452   driver = smtp
1453   message_linelength_limit = 2097152
1454 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1455   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1456 .endif
1457 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1458   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1459 .endif
1460 .ifdef REMOTE_SMTP_RETURN_PATH
1461   return_path = REMOTE_SMTP_RETURN_PATH
1462 .endif
1463 .ifdef REMOTE_SMTP_HELO_DATA
1464   helo_data=REMOTE_SMTP_HELO_DATA
1465 .endif
1466 .ifdef REMOTE_SMTP_INTERFACE
1467   interface = REMOTE_SMTP_INTERFACE
1468 .endif
1469 .ifdef DKIM_DOMAIN
1470 dkim_domain = DKIM_DOMAIN
1471 .endif
1472 .ifdef DKIM_IDENTITY
1473 dkim_identity = DKIM_IDENTITY
1474 .endif
1475 .ifdef DKIM_SELECTOR
1476 dkim_selector = DKIM_SELECTOR
1477 .endif
1478 .ifdef DKIM_PRIVATE_KEY
1479 dkim_private_key = DKIM_PRIVATE_KEY
1480 .endif
1481 .ifdef DKIM_CANON
1482 dkim_canon = DKIM_CANON
1483 .endif
1484 .ifdef DKIM_STRICT
1485 dkim_strict = DKIM_STRICT
1486 .endif
1487 .ifdef DKIM_SIGN_HEADERS
1488 dkim_sign_headers = DKIM_SIGN_HEADERS
1489 .endif
1490 .ifdef DKIM_TIMESTAMPS
1491 dkim_timestamps = DKIM_TIMESTAMPS
1492 .endif
1493 .ifdef TLS_DH_MIN_BITS
1494 tls_dh_min_bits = TLS_DH_MIN_BITS
1495 .endif
1496 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1497 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1498 .endif
1499 .ifdef REMOTE_SMTP_PRIVATEKEY
1500 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1501 .endif
1502 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1503   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1504 .endif
1505 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1506   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1507 .endif
1508
1509 EOF
1510
1511 i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
1512 backup_remote:
1513   driver = smtp
1514   multi_domain
1515   message_linelength_limit = 2097152
1516   hosts_require_auth = *
1517   hosts_try_auth = *
1518   envelope_to_add
1519   # manual return path because we want it to be the envelope sender
1520   # we got not the one we are using in this smtp transport
1521   headers_add = "Return-path: $sender_address"
1522 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1523   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1524 .endif
1525 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1526   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1527 .endif
1528 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1529   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1530 .endif
1531 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1532   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1533 .endif
1534 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1535   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1536 .endif
1537 .ifdef REMOTE_SMTP_HELO_DATA
1538   helo_data=REMOTE_SMTP_HELO_DATA
1539 .endif
1540 .ifdef TLS_DH_MIN_BITS
1541 tls_dh_min_bits = TLS_DH_MIN_BITS
1542 .endif
1543 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1544 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1545 .endif
1546 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1547 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1548 .endif
1549 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1550   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1551 .endif
1552 EOF
1553
1554 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1555 ### router/900_exim4-config_local_user
1556 #################################
1557
1558 # This router matches local user mailboxes. If the router fails, the error
1559 # message is "Unknown user".
1560 local_user:
1561   debug_print = "R: local_user for $local_part@$domain"
1562   driver = accept
1563   domains = +local_domains
1564 # ian: default file except where mentioned.
1565 # ian: commented this. I get all local parts. for bk, an rcpt
1566 # check handles checking with dovecot, and the only router
1567 # after this is root.
1568 #  local_parts = ! root
1569   transport = LOCAL_DELIVERY
1570   cannot_route_message = Unknown user
1571 # ian: added for + addressing.
1572   local_part_suffix = +*
1573   local_part_suffix_optional
1574 EOF
1575 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1576 dovecot_lmtp:
1577   driver = lmtp
1578   socket = /var/run/dovecot/lmtp
1579   #maximum number of deliveries per batch, default 1
1580   batch_max = 200
1581   envelope_to_add
1582 EOF
1583
1584 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1585 # same as debians 30_exim4-config_remote_smtp, but
1586 # with interface added at the end.
1587
1588 remote_smtp_vpn:
1589   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1590   driver = smtp
1591   message_linelength_limit = 2097152
1592 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1593   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1594 .endif
1595 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1596   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1597 .endif
1598 .ifdef REMOTE_SMTP_RETURN_PATH
1599   return_path = REMOTE_SMTP_RETURN_PATH
1600 .endif
1601 .ifdef REMOTE_SMTP_HELO_DATA
1602   helo_data=REMOTE_SMTP_HELO_DATA
1603 .endif
1604 .ifdef DKIM_DOMAIN
1605 dkim_domain = DKIM_DOMAIN
1606 .endif
1607 .ifdef DKIM_SELECTOR
1608 dkim_selector = DKIM_SELECTOR
1609 .endif
1610 .ifdef DKIM_PRIVATE_KEY
1611 dkim_private_key = DKIM_PRIVATE_KEY
1612 .endif
1613 .ifdef DKIM_CANON
1614 dkim_canon = DKIM_CANON
1615 .endif
1616 .ifdef DKIM_STRICT
1617 dkim_strict = DKIM_STRICT
1618 .endif
1619 .ifdef DKIM_SIGN_HEADERS
1620 dkim_sign_headers = DKIM_SIGN_HEADERS
1621 .endif
1622 .ifdef TLS_DH_MIN_BITS
1623 tls_dh_min_bits = TLS_DH_MIN_BITS
1624 .endif
1625 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1626 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1627 .endif
1628 .ifdef REMOTE_SMTP_PRIVATEKEY
1629 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1630 .endif
1631 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1632   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1633 .endif
1634 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1635   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1636 .endif
1637   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1638 EOF
1639
1640 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1641 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1642
1643 smarthost_dkim:
1644   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1645   driver = smtp
1646   message_linelength_limit = 2097152
1647   multi_domain
1648   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1649         {\
1650         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1651         }\
1652         {} \
1653       }
1654 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1655   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1656 .endif
1657 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1658   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1659 .endif
1660 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1661   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1662 .endif
1663 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1664   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1665 .endif
1666 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1667   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1668 .endif
1669 .ifdef REMOTE_SMTP_RETURN_PATH
1670   return_path = REMOTE_SMTP_RETURN_PATH
1671 .endif
1672 .ifdef REMOTE_SMTP_HELO_DATA
1673   helo_data=REMOTE_SMTP_HELO_DATA
1674 .endif
1675 .ifdef TLS_DH_MIN_BITS
1676 tls_dh_min_bits = TLS_DH_MIN_BITS
1677 .endif
1678 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1679 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1680 .endif
1681 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1682 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1683 .endif
1684 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1685   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1686 .endif
1687 .ifdef DKIM_DOMAIN
1688 dkim_domain = DKIM_DOMAIN
1689 .endif
1690 .ifdef DKIM_SELECTOR
1691 dkim_selector = DKIM_SELECTOR
1692 .endif
1693 .ifdef DKIM_PRIVATE_KEY
1694 dkim_private_key = DKIM_PRIVATE_KEY
1695 .endif
1696 .ifdef DKIM_CANON
1697 dkim_canon = DKIM_CANON
1698 .endif
1699 .ifdef DKIM_STRICT
1700 dkim_strict = DKIM_STRICT
1701 .endif
1702 .ifdef DKIM_SIGN_HEADERS
1703 dkim_sign_headers = DKIM_SIGN_HEADERS
1704 .endif
1705 EOF
1706
1707
1708 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1709 # default stuff, i havent checked if its needed
1710 dc_minimaldns='false'
1711 dc_relay_nets=''
1712 CFILEMODE='644'
1713 dc_use_split_config='true'
1714 dc_mailname_in_oh='true'
1715 EOF
1716
1717
1718 # * radicale
1719 if mailhost; then
1720   if ! mountpoint /o; then
1721     echo "error /o is not a mountpoint" >&2
1722     exit 1
1723   fi
1724
1725   # davx/davdroid setup instructions at the bottom
1726
1727   # main docs:
1728   # http://radicale.org/user_documentation/
1729   # https://davdroid.bitfire.at/configuration/
1730
1731   # note on debugging: if radicale can't bind to the address,
1732   # in the log it just says "Starting Radicale". If you run
1733   # it in the foreground, it will give more info. Background
1734   # plus debug does not help.
1735   # sudo -u radicale radicale -D
1736
1737   # created password file with:
1738   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1739   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1740   # # setup chgrp www-data in ./conflink
1741
1742   pi-nostart radicale
1743
1744   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1745 [Unit]
1746
1747 After=network.target network-online.target mailnn.service $vpnser
1748
1749 Wants=$vpnser
1750 JoinsNamespaceOf=mailnn.service
1751 StartLimitIntervalSec=0
1752
1753 [Service]
1754 PrivateNetwork=true
1755 BindPaths=$bindpaths
1756 Restart=always
1757 # time to sleep before restarting a service
1758 RestartSec=20
1759
1760 [Install]
1761 # for openvpn
1762 RequiredBy=$vpnser
1763 EOF
1764
1765
1766   # use persistent uid/gid
1767   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1768   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1769   if [[ $uid != 609 ]]; then
1770     m systemctl stop radicale ||:
1771     m usermod -u 609 radicale
1772     m groupmod -g 609 radicale
1773     m usermod -g 609 radicale
1774   fi
1775   m find /o/radicale  -xdev -exec chown -h 609 {} +
1776   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1777
1778
1779   # I moved /var/lib/radicale after it's initialization.
1780   # I did a sudo -u radicale git init in the collections subfolder
1781   # after it gets created, per the git docs.
1782   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1783
1784   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1785
1786   # more config is for li in distro-end
1787
1788   # coment in this file says this is needed for it to run on startup
1789   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1790
1791   # comments say default is 0.0.0.0:5232
1792   m setini hosts 10.8.0.4:5232 server
1793   # https://radicale.org/2.1.html
1794   m setini type http_x_remote_user auth
1795
1796
1797   # disable power management feature, set to 240 min sync interval,
1798   # so it shouldn't be bad.
1799
1800   # davx^5 from f-droid
1801   # login with url and user name
1802   # url https://cal.iankelling.org/ian
1803   # username ian
1804   # pass, see password manager for radicale
1805   #
1806   # add account dialog:
1807   #
1808   # set account name as ian@iankelling.org, per help text below the
1809   # field.
1810   #
1811   # switch to groups are per-contact categories,
1812   # per https://davdroid.bitfire.at/configuration/radicale/
1813   #
1814   #
1815   # After setting up account, I added one address book, named
1816   # ianaddr. calender was already created, named ian. checked boxes under
1817   # both. synced.
1818   #
1819   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1820   #
1821   # ignorable background info:
1822   #
1823   # opentasks uses the calendar file.
1824   #
1825   # The address book I created got a uuid as a name for the file. Note
1826   # the .props file says if it's a calendar or addressbook.
1827   #
1828   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1829   # both show the requests happening. Without creating the address book,
1830   # after creating a contact, a sync would delete it.
1831   #
1832   # Address books correspond to .props files in the radicale dir.
1833   #
1834   #  Some background is here,
1835   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1836   # which shows separate vcard option is from rfc 6350, the other is 2426,
1837   # radicale page says it implements the former not the latter,
1838   # which conflicts with the documentation of which to select, but whatever.
1839   # http://radicale.org/technical_choices/
1840   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1841   #
1842   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1843
1844   # Note, radicale had built-in git support to track changes, but they
1845   # removed it in 2.0.
1846
1847 fi
1848
1849 # * dovecot
1850
1851 # ** $MAIL_HOST|bk|je)
1852 case $HOSTNAME in
1853   $MAIL_HOST|bk|je)
1854     # based on a little google and package search, just the dovecot
1855     # packages we need instead of dovecot-common.
1856     #
1857     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1858     # directly.  The reason to do this is to use dovecot\'s sieve, which
1859     # can generally do more than exims filters (a few things less) and
1860     # sieve has the benefit of being supported in postfix and
1861     # proprietary/weird environments, so there is more examples on the
1862     # internet.
1863     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1864
1865     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1866       if [[ -e $f ]]; then
1867         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1868         break
1869       fi
1870     done
1871     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1872       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1873     done
1874
1875     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1876     i /etc/dovecot/dhparam <<'EOF'
1877 -----BEGIN DH PARAMETERS-----
1878 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1879 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1880 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1881 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1882 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1883 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1884 -----END DH PARAMETERS-----
1885 EOF
1886     {
1887
1888       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1889         cat <<'EOF'
1890 ssl_cert = </etc/exim4/fullchain.pem
1891 ssl_key = </etc/exim4/privkey.pem
1892 EOF
1893       else
1894         # We have a lets encrypt hooks that puts things here.
1895         # This is just for bk, which uses the vpn cert in exim
1896         # for sending mail, but the local hostname cert for
1897         # dovecot.
1898         cat <<'EOF'
1899 ssl_cert = </etc/exim4/exim.crt
1900 ssl_key = </etc/exim4/exim.key
1901 EOF
1902       fi
1903
1904       cat <<'EOF'
1905 # https://ssl-config.mozilla.org
1906 ssl = required
1907 # this is the same as the certbot list, i check changes in /a/bin/ds/filesystem/usr/local/bin/check-lets-encrypt-ssl-settings
1908 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
1909 ssl_protocols = TLSv1.2
1910 ssl_prefer_server_ciphers = no
1911
1912 protocol lmtp {
1913 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1914 # default is just $mail_plugins
1915   mail_plugins = $mail_plugins sieve
1916 }
1917 EOF
1918       if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show dovecot-core)" ge 1:2.3; then
1919         cat <<EOF
1920 ssl_dh = </etc/dovecot/dhparam
1921 EOF
1922       fi
1923     } >/etc/dovecot/local.conf
1924
1925     ;;&
1926
1927   # **  $MAIL_HOST)
1928   $MAIL_HOST)
1929     # If we changed 90-sieve.conf and removed the active part of the
1930     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1931     # default config if not needed. This won\'t work as a symlink in /a/c
1932     # unfortunately.
1933     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1934
1935     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1936       m touch $uhome/sieve/personal{,end}{,test}.sieve
1937     fi
1938
1939     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1940     cat >>/etc/dovecot/local.conf <<EOF
1941 # simple password file based login
1942 !include conf.d/auth-passwdfile.conf.ext
1943
1944 # ian: %u is used for alerts user vs iank
1945 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1946 mail_uid = $u
1947 mail_gid = $u
1948
1949 protocol lmtp {
1950 # For a normal setup with exim, we need something like this, which
1951 # removes the domain part
1952 #  auth_username_format = %Ln
1953 #
1954 #  or else # Exim says something like
1955 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1956 # Dovecot verbose log says something like
1957 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1958 # reference: http://wiki.dovecot.org/LMTP/Exim
1959 #
1960 # However, I use this to direct all mail to the same inbox.
1961 # A normal way to do this, which I did at first is to have
1962 # a router in exim almost at the end, eg 950,
1963 #local_catchall:
1964 #  debug_print = "R: catchall for \$local_part@\$domain"
1965 #  driver = redirect
1966 #  domains = +local_domains
1967 #  data = $u
1968 # based on
1969 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1970 # with superflous options removed.
1971 # However, this causes the envelope to be rewritten,
1972 # which makes filtering into mailboxes a little less robust or more complicated,
1973 # so I've done it this way instead. it also requires
1974 # modifying the local router in exim.
1975   auth_username_format = $u
1976 }
1977 EOF
1978     ;;&
1979   # **  bk|je)
1980   bk|je)
1981     chown -R mail.mail /m/md
1982
1983     f=/etc/dovecot/conf.d/10-auth.conf
1984     if [[ -e $f ]]; then
1985       mv $f $f-iank-disabled
1986     fi
1987
1988     cat >>/etc/dovecot/local.conf <<EOF
1989 !include /etc/dovecot/local.conf.ext
1990
1991 # for debugging info, uncomment these.
1992 # logs go to syslog and to /var/log/mail.log
1993 #auth_verbose=yes
1994 #mail_debug=yes
1995
1996
1997 protocol lmtp {
1998 # This downcases the localpart. default is case sensitive.
1999 # case sensitive local part will miss out on valid email when some person or system
2000 # mistakenly capitalizes things.
2001   auth_username_format = %Lu
2002 }
2003
2004 # make 147 only listen on localhost, plan to use for nextcloud.
2005 # copied from mailinabox
2006 service imap-login {
2007   inet_listener imap {
2008     address = 127.0.0.1
2009   }
2010 }
2011 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
2012 service auth {
2013   unix_listener auth-client {
2014     user = Debian-exim
2015     group = Debian-exim
2016   }
2017 }
2018
2019
2020 plugin {
2021   sieve_before = /etc/dovecot/sieve-spam.sieve
2022   # from mailinabox
2023   sieve = /m/sieve/%d/%n.sieve
2024   sieve_dir = /m/sieve/%d/%n
2025 }
2026
2027
2028 # all taken from mailinabox.
2029 mail_location = maildir:/m/md/%d/%n
2030 # meh, ok.
2031 mail_privileged_group = mail
2032 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
2033 first_valid_uid = 1
2034
2035 # todo: test these changes in the universal config
2036 # mailboxes taken from mailinabox but removed
2037 # settings duplicate to defaults
2038 namespace inbox {
2039   mailbox INBOX {
2040     auto = subscribe
2041   }
2042   mailbox Spam {
2043     special_use = \Junk
2044     auto = subscribe
2045   }
2046   mailbox Drafts {
2047     auto = subscribe
2048   }
2049   mailbox Sent {
2050     auto = subscribe
2051   }
2052   mailbox Trash {
2053     auto = subscribe
2054   }
2055   mailbox Archive {
2056     special_use = \Archive
2057     auto = subscribe
2058   }
2059 }
2060 auth_mechanisms = plain login
2061 EOF
2062
2063     i /etc/dovecot/sieve-spam.sieve <<'EOF'
2064 require ["regex", "fileinto", "imap4flags"];
2065
2066 if allof (header :regex "X-Spam-Status" "^Yes") {
2067   fileinto "Spam";
2068   stop;
2069 }
2070 EOF
2071
2072     i /etc/dovecot/local.conf.ext <<'EOF'
2073 passdb {
2074   driver = sql
2075   args = /etc/dovecot/dovecot-sql.conf.ext
2076 }
2077 userdb {
2078   driver = sql
2079   args = /etc/dovecot/dovecot-sql.conf.ext
2080 }
2081
2082 EOF
2083
2084     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
2085 # from mailinabox
2086 driver = sqlite
2087 # for je and bk, populated the testignore users for the relevant domains
2088 connect = /m/rc/users.sqlite
2089 default_pass_scheme = SHA512-CRYPT
2090 password_query = SELECT email as user, password FROM users WHERE email='%u';
2091 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
2092 iterate_query = SELECT email AS user FROM users;
2093 EOF
2094     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
2095
2096     # db needs to be in a www-data writable directory
2097     db=/m/rc/users.sqlite
2098     if [[ ! -s $db ]]; then
2099       m mkdir -p /m/rc
2100       m sqlite3 $db <<'EOF'
2101 CREATE TABLE users (
2102 id INTEGER PRIMARY KEY AUTOINCREMENT,
2103 email TEXT NOT NULL UNIQUE,
2104 password TEXT NOT NULL,
2105 extra,
2106 privileges TEXT NOT NULL DEFAULT '');
2107 EOF
2108     fi
2109     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
2110     #
2111     # example of adding a user:
2112     # hash: doveadm pw -s SHA512-CRYPT -p passhere
2113     # sqlite3 /m/rc/users.sqlite <<'EOF'
2114     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
2115     #EOF
2116     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
2117
2118     # this should be at the end since it requires a valid dovecot config
2119     m sievec /etc/dovecot/sieve-spam.sieve
2120     ;;&
2121   # **  bk)
2122   bk)
2123     # roundcube uses this
2124     mkdir -p /m/sieve
2125     chown mail.mail /m/sieve
2126     m pi dovecot-managesieved
2127     ;;
2128 esac
2129
2130 # * thunderbird autoconfig setup
2131
2132 bkdomains=(expertpathologyreview.com amnimal.ninja)
2133 if [[ $HOSTNAME == bk ]]; then
2134   for domain in ${bkdomains[@]}; do
2135     m /a/exe/web-conf apache2 autoconfig.$domain
2136     dir=/var/www/autoconfig.$domain/html/mail
2137     m mkdir -p $dir
2138     # taken from mailinabox
2139     i $dir/config-v1.1.xml <<EOF
2140 <?xml version="1.0" encoding="UTF-8"?>
2141 <clientConfig version="1.1">
2142     <emailProvider id="$domain">
2143       <domain>$domain</domain>
2144
2145       <displayName>$domain Mail</displayName>
2146       <displayShortName>$domain</displayShortName>
2147
2148       <incomingServer type="imap">
2149          <hostname>mail2.iankelling.org</hostname>
2150          <port>993</port>
2151          <socketType>SSL</socketType>
2152          <username>%EMAILADDRESS%</username>
2153          <authentication>password-cleartext</authentication>
2154       </incomingServer>
2155
2156       <outgoingServer type="smtp">
2157          <hostname>mail2.iankelling.org</hostname>
2158          <port>587</port>
2159          <socketType>STARTTLS</socketType>
2160          <username>%EMAILADDRESS%</username>
2161          <authentication>password-cleartext</authentication>
2162          <addThisServer>true</addThisServer>
2163          <useGlobalPreferredServer>false</useGlobalPreferredServer>
2164       </outgoingServer>
2165
2166       <documentation url="https://$domain/">
2167          <descr lang="en">$domain website.</descr>
2168       </documentation>
2169     </emailProvider>
2170
2171     <webMail>
2172       <loginPage url="https://$domain/roundcube" />
2173       <loginPageInfo url="https://$domain/roundcube" >
2174         <username>%EMAILADDRESS%</username>
2175         <usernameField id="rcmloginuser" name="_user" />
2176         <passwordField id="rcmloginpwd" name="_pass" />
2177         <loginButton id="rcmloginsubmit" />
2178       </loginPageInfo>
2179     </webMail>
2180     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
2181 </clientConfig>
2182 EOF
2183   done
2184 fi
2185
2186 # * roundcube setup
2187
2188 if [[ $HOSTNAME == bk ]]; then
2189
2190   # zip according to /installer
2191   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
2192   # $config['enable_installer'] = true;
2193   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
2194
2195   ### begin composer install
2196   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
2197   # cd $(mktemp -d)
2198   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
2199   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
2200   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
2201   #   echo 'ERROR: Invalid composer installer checksum' >&2
2202   #   rm -fv composer-setup.php
2203   #   exit 1
2204   # fi
2205   # m php composer-setup.php --quiet
2206   # rm -fv composer-setup.php
2207   # m mv composer.phar /usr/local/bin
2208
2209   # the above method gets composer2, carddav plugin at least doesnt work with that
2210   # yet, it was just released 10-24-2020.
2211   m cd /usr/local/bin
2212   m wget -nv -N https://getcomposer.org/composer-1.phar
2213   chmod +x composer-1.phar
2214   ### end composer install
2215
2216   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
2217   ncdirs=(/var/www/ncninja)
2218   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
2219   # point debian cronjob to our local install, preventing daily cron error
2220
2221   # debian's cronjob will fail, remove both paths it uses just to be sure
2222   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
2223
2224   #### begin dl roundcube
2225   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
2226   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
2227   cd /root
2228   if [[ -e $f ]]; then
2229     timestamp=$(stat -c %Y $f)
2230   else
2231     timestamp=0
2232   fi
2233   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
2234   new_timestamp=$(stat -c %Y $f)
2235   for rcdir in ${rcdirs[@]}; do
2236     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
2237       m tar -C /usr/local/lib --no-same-owner -zxf $f
2238       m rm -rf $rcdir
2239       m mv /usr/local/lib/roundcubemail-$v $rcdir
2240     fi
2241   done
2242   #### end dl roundcube
2243
2244   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2245     domain=${bkdomains[i]}
2246     rcdir=${rcdirs[i]}
2247     rcbase=${rcdir##*/}
2248     ncdir=${ncdirs[i]}
2249     myncdir=/root/${ncdir##*/}
2250     mkdir -p $myncdir
2251
2252     # copied from debians cronjob
2253     i /etc/cron.d/$rcbase <<EOF
2254 #  Roundcube database cleaning: finally removes all records that are
2255 #  marked as deleted.
2256 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
2257 EOF
2258
2259     m /a/exe/web-conf - apache2 $domain <<EOF
2260 Alias /roundcube $rcdir
2261 ### begin roundcube settings
2262 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
2263 <Directory $rcdir/>
2264   Options +FollowSymLinks
2265   # This is needed to parse $rcdir/.htaccess.
2266   AllowOverride All
2267   Require all granted
2268 </Directory>
2269 # Protecting basic directories:
2270 <Directory $rcdir/config>
2271   Options -FollowSymLinks
2272   AllowOverride None
2273 </Directory>
2274 ### end roundcube settings
2275
2276
2277 ### begin nextcloud settings
2278 Alias /nextcloud "$ncdir/"
2279 <Directory $ncdir/>
2280   Require all granted
2281   AllowOverride All
2282   Options FollowSymLinks MultiViews
2283
2284   <IfModule mod_dav.c>
2285     Dav off
2286   </IfModule>
2287
2288 </Directory>
2289
2290 # based on install checker, links to
2291 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
2292 # their example was a bit wrong, I figured it out by adding
2293 # LogLevel warn rewrite:trace5
2294 # then watching the apache logs
2295
2296 RewriteEngine on
2297 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2298 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2299 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2300 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2301 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2302 ### end nextcloud settings
2303 EOF
2304     if [[ ! -e $rcdir/config/secret ]]; then
2305       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2306     fi
2307     secret=$(cat $rcdir/config/secret)
2308
2309     rclogdir=/var/log/$rcbase
2310     rctmpdir=/var/tmp/$rcbase
2311     rcdb=/m/rc/$rcbase.sqlite
2312     # config from mailinabox
2313     i $rcdir/config/config.inc.php <<EOF
2314 <?php
2315 \$config = array();
2316 # debian creates this for us
2317 \$config['log_dir'] = '$rclogdir/';
2318 # debian also creates a temp dir, but it is under its install dir,
2319 # seems better to have our own.
2320 \$config['temp_dir'] = '$rctmpdir/';
2321 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2322 \$config['default_host'] = 'ssl://localhost';
2323 \$config['default_port'] = 993;
2324 \$config['imap_conn_options'] = array(
2325   'ssl'         => array(
2326      'verify_peer'  => false,
2327      'verify_peer_name'  => false,
2328    ),
2329  );
2330 \$config['imap_timeout'] = 15;
2331 \$config['smtp_server'] = 'tls://127.0.0.1';
2332 \$config['smtp_conn_options'] = array(
2333   'ssl'         => array(
2334      'verify_peer'  => false,
2335      'verify_peer_name'  => false,
2336    ),
2337  );
2338 \$config['product_name'] = 'webmail';
2339 \$config['des_key'] = '$secret';
2340 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2341 \$config['skin'] = 'elastic';
2342 \$config['login_autocomplete'] = 2;
2343 \$config['password_charset'] = 'UTF-8';
2344 \$config['junk_mbox'] = 'Spam';
2345 # disable builtin addressbook
2346 \$config['address_book_type'] = '';
2347 ?>
2348 EOF
2349
2350     m mkdir -p $rclogdir
2351     m chmod 750 $rclogdir
2352     m chown www-data:adm $rclogdir
2353     # note: subscribed to updates:
2354     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2355     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2356     m mkdir -p $rctmpdir /m/rc
2357     m chown -R www-data.www-data $rctmpdir /m/rc
2358     m chmod 750 $rctmpdir
2359     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2360     # todo: check for other mailinabox things
2361     m sudo -u www-data touch $rclogdir/errors.log
2362
2363     #### begin carddav install
2364     # This is the official roundcube carddav repo.
2365     # Install doc suggests downloading with composer, but that
2366     # didnt work, it said some ldap package for roundcube was missing,
2367     # but I dont want to download some extra ldap thing.
2368     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2369     verf=$rcdir/plugins/carddav/myversion
2370     upgrade=false
2371     install=false
2372     v=4.0.0
2373     if [[ -e $verf ]]; then
2374       if [[ $(cat $verf) != "$v" ]]; then
2375         install=true
2376         upgrade=true
2377       fi
2378     else
2379       install=true
2380     fi
2381     if $install; then
2382       m rm -rf $rcdir/plugins/carddav
2383       tmpd=$(mktemp -d)
2384       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2385       cd $rcdir/plugins
2386       tar xzf $tmpd/t.tgz
2387       rm -rf $tmpd
2388       m chown -R www-data:www-data $rcdir/plugins/carddav
2389       m cd $rcdir/plugins/carddav
2390       if $upgrade; then
2391         m sudo -u www-data composer-1.phar update --no-dev
2392       else
2393         m sudo -u www-data composer-1.phar install --no-dev
2394       fi
2395       m chown -R root:root $rcdir/plugins/carddav
2396       echo $v >$verf
2397     fi
2398
2399     # So, strangely, this worked in initial testing, but then
2400     # on first run it wouldn't show the existing contacts until
2401     # I went into the carddav settings and did "force immediate sync",
2402     # which seemed to fix things. Note, some of these settings
2403     # get initalized per/addressbook in the db, then need changing
2404     # there or through the settings menu.
2405
2406     # About categories, see https://www.davx5.com/tested-with/nextcloud
2407     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2408     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2409 <?php
2410 \$prefs['_GLOBAL']['hide_preferences'] = false;
2411 \$prefs['davserver'] = array(
2412 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2413   'name'         =>  'Main',
2414   'username'     =>  '%u', // login username
2415   'password'     =>  '%p', // login password
2416   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2417   'active'       =>  true,
2418   'readonly'     =>  false,
2419   'refresh_time' => '00:10:00',
2420   'fixed'        =>  array('username','password'),
2421   'use_categories' => false,
2422   'hide'        =>  false,
2423 );
2424 ?>
2425 EOF
2426     #### end carddav install
2427
2428     cd $rcdir/plugins
2429     if [[ ! -d html5_notifier ]]; then
2430       m git clone https://github.com/stremlau/html5_notifier
2431     fi
2432     cd $rcdir/plugins/html5_notifier
2433     m git pull --rebase
2434
2435     # todo: try out roundcube plugins: thunderbird labels
2436
2437     # Password changing plugin settings
2438     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2439 # following are from mailinabox
2440 $config['password_minimum_length'] = 8;
2441 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2442 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2443 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2444 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2445 $config['password_dovecotpw_with_method'] = true;
2446 EOF
2447     # so PHP can use doveadm, for the password changing plugin
2448     m usermod -a -G dovecot www-data
2449     m usermod -a -G mail $u
2450
2451     # so php can update passwords
2452     m chown www-data:dovecot /m/rc/users.sqlite
2453     m chmod 664 /m/rc/users.sqlite
2454
2455     # Run Roundcube database migration script (database is created if it does not exist)
2456     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2457     m chown www-data:www-data $rcdb
2458     m chmod 664 $rcdb
2459   done # end loop over domains and rcdirs
2460
2461   ### begin php setup for rc ###
2462   # Enable PHP modules.
2463   m phpenmod -v php mcrypt imap
2464   # dpkg says this is required.
2465   # nextcloud needs these too
2466   m a2enmod proxy_fcgi setenvif
2467   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2468   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2469   m a2enconf $fpm
2470   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2471   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2472   m a2dismod php$phpver
2473   # according to /install, we should set date.timezone,
2474   # but that is dumb, the system already has the right zone in
2475   # $rclogdir/errors.log
2476   # todo: consider other settings in
2477   # /a/opt/mailinabox/setup/nextcloud.sh
2478   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2479 apc.enable_cli = 1
2480 EOF
2481
2482   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2483 date.timezone = "America/New_York"
2484 # for nextcloud
2485 upload_max_filesize = 2000M
2486 post_max_size = 2000M
2487 # install checker, nextcloud/settings/admin/overview
2488 memory_limit = 512M
2489 EOF
2490   m systemctl restart $fpm
2491   # dunno if reload/restart is needed
2492   m systemctl reload apache2
2493   # note bk backups are defined in crontab outside this file
2494   ### end php setup for rc ###
2495
2496 fi # end roundcube setup
2497
2498 # * nextcloud setup
2499
2500 if [[ $HOSTNAME == bk ]]; then
2501   # from install checker, nextcloud/settings/admin/overview and
2502   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2503   # curl from the web installer requirement, but i switched to cli
2504   # it recommends php-file info, but that is part of php7.3-common, already got installed
2505   # with roundcube.
2506   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2507
2508   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2509   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2510 [www]
2511 clear_env = no
2512 EOF
2513
2514   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2515     domain=${bkdomains[i]}
2516     ncdir=${ncdirs[i]}
2517     ncbase=${ncdir##*/}
2518     m cd /var/www
2519     if [[ ! -e $ncdir/index.php ]]; then
2520       # if we wanted to only install a specific version, use something like
2521       # file=latest-22.zip
2522       file=latest.zip
2523       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2524       m rm -rf nextcloud
2525       m unzip -q $file
2526       m rm -f $file
2527       m chown -R www-data.www-data nextcloud
2528       m mv nextcloud $ncdir
2529     fi
2530
2531     if [[ ! -e $myncdir/done-install ]]; then
2532       m cd $ncdir
2533       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2534       m touch $myncdir/done-install
2535     fi
2536
2537     # note, strange this happend where updater did not increment the version var,
2538     # mine was stuck on 20. I manually updated it.
2539     m cd $ncdir/config
2540     if [[ ! -e $myncdir/config.php-orig ]]; then
2541       m cp -a config.php $myncdir/config.php-orig
2542     fi
2543     cat $myncdir/config.php-orig - >$myncdir/tmp.php <<EOF
2544 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2545 \$CONFIG["mail_smtpmode"] = "sendmail";
2546 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2547 \$CONFIG["mail_smtpport"] = 25;
2548 \$CONFIG["mail_smtptimeout"] = 10;
2549 \$CONFIG["mail_smtpsecure"] = "";
2550 \$CONFIG["mail_smtpauth"] = false;
2551 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2552 \$CONFIG["mail_smtpname"] = "";
2553 \$CONFIG["mail_smtppassword"] = "";
2554 \$CONFIG["mail_domain"] = "$domain";
2555
2556 # https://github.com/nextcloud/user_external#readme
2557 # plus mailinabox example
2558 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2559
2560
2561 # based on installer check
2562 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2563 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2564
2565 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2566 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2567 \$CONFIG['trusted_domains'] = array (
2568         0 => '$domain',
2569     );
2570 #\$CONFIG[''] = '';
2571 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2572 var_export(\$CONFIG);
2573 fwrite(STDOUT, ";\n");
2574 EOF
2575     e running php $myncdir/tmp.php
2576     # note: we leave it around place for debugging
2577     php $myncdir/tmp.php >config.php
2578     cd $ncdir
2579     m sudo -u www-data php occ maintenance:update:htaccess
2580     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2581     # user_external not compaible with nc 23
2582     for app in contacts calendar; do
2583       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2584         cd $ncdir
2585         m sudo -u www-data php occ app:install $app
2586       fi
2587     done
2588     i /etc/systemd/system/$ncbase.service <<EOF
2589 [Unit]
2590 Description=ncup $ncbase
2591 After=multi-user.target
2592
2593 [Service]
2594 Type=oneshot
2595 ExecStart=/usr/local/bin/ncup $ncbase
2596 User=www-data
2597 IOSchedulingClass=idle
2598 CPUSchedulingPolicy=idle
2599 EOF
2600     i /etc/systemd/system/$ncbase.timer <<EOF
2601 [Unit]
2602 Description=ncup $ncbase timer
2603
2604 [Timer]
2605 OnCalendar=Daily
2606
2607 [Install]
2608 WantedBy=timers.target
2609 EOF
2610     systemctl enable --now $ncbase.timer
2611     i /usr/local/bin/ncup <<'EOFOUTER'
2612 #!/bin/bash
2613
2614 source /usr/local/lib/err
2615
2616 m() { printf "%s\n" "$*";  "$@"; }
2617 err-cleanup() {
2618   echo failed nextcloud update for $ncbase >&2
2619   # -odf or else systemd will kill the background delivery process
2620   # and the message will sit in the queue until the next queue run.
2621   exim -odf -t <<EOF
2622 To: alerts@iankelling.org
2623 From: www-data@$(hostname -f)
2624 Subject: failed nextcloud update for $ncbase
2625
2626 For logs, run: jr -u $ncbase
2627 EOF
2628 }
2629
2630 if [[ $(id -u -n) != www-data ]]; then
2631   echo error: running as wrong user: $(id -u -n), expected www-data
2632   exit 1
2633 fi
2634
2635 if [[ ! $1 ]]; then
2636   echo error: expected an arg, nextcloud relative base dir
2637   exit 1
2638 fi
2639
2640 ncbase=$1
2641 cd /var/www/$ncbase
2642 # https://docs.nextcloud.com/server/22/admin_manual/maintenance/update.html?highlight=updater+phar
2643 m php /var/www/$ncbase/updater/updater.phar -n
2644 EOFOUTER
2645     chmod +x /usr/local/bin/ncup
2646
2647     mkdir -p /var/www/cron-errors
2648     chown www-data.www-data /var/www/cron-errors
2649     i /etc/cron.d/$ncbase <<EOF
2650 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2651 SHELL=/bin/bash
2652 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2653 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2654 EOF
2655
2656   done
2657 fi
2658
2659
2660 # * exim host conditional config
2661
2662 # ** exim certs
2663
2664 all_dirs=(/p/c/filesystem)
2665 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2666   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2667 done
2668 files=()
2669 for d in ${all_dirs[@]}; do
2670   f=$d/etc/exim4/passwd
2671   if [[ -e $f  ]]; then
2672     files+=($f)
2673   fi
2674   tmp=($d/etc/exim4/*.pem)
2675   if (( ${#tmp[@]} )); then
2676     files+=(${tmp[@]})
2677   fi
2678 done
2679
2680 if (( ${#files[@]} )); then
2681   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2682 fi
2683
2684
2685 # ** exim: auth
2686
2687 case $HOSTNAME in
2688   bk|je)
2689     # avoid accepting mail for invalid users
2690     # https://wiki.dovecot.org/LMTP/Exim
2691     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2692 deny
2693   message = invalid recipient
2694   domains = +local_domains
2695   !verify = recipient/callout=no_cache
2696 EOF
2697     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2698 dovecot_plain:
2699   driver = dovecot
2700   public_name = PLAIN
2701   server_socket = /var/run/dovecot/auth-client
2702   server_set_id = $auth1
2703 EOF
2704     ;;
2705 esac
2706 if $bhost_t; then
2707   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2708 # from 30_exim4-config_examples
2709 plain_server:
2710 driver = plaintext
2711 public_name = PLAIN
2712 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2713 server_set_id = $auth2
2714 server_prompts = :
2715 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2716 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2717 .endif
2718 EOF
2719 fi
2720
2721 # ** exim: main daemon use non-default config file
2722 case $HOSTNAME in
2723   bk|$MAIL_HOST)
2724     # to see the default comments in /etc/default/exim4:
2725     # s update-exim4defaults --force --init
2726     # which will overwrite any existing file
2727     i /etc/default/exim4 <<'EOF'
2728 QUEUERUNNER='combined'
2729 QUEUEINTERVAL='30m'
2730 COMMONOPTIONS='-C /etc/exim4/my.conf'
2731 UPEX4OPTS='-o /etc/exim4/my.conf'
2732 # i use epanic-clean for alerting if there are bad paniclog entries
2733 E4BCD_WATCH_PANICLOG='no'
2734 EOF
2735     # make exim be a nonroot setuid program.
2736     chown Debian-exim:Debian-exim /usr/sbin/exim4
2737     # needs guid set in order to become Debian-exim
2738     chmod g+s,u+s /usr/sbin/exim4
2739     # need this to avoid error on service reload:
2740     # 2022-08-07 18:44:34.005 [892491] pid 892491: SIGHUP received: re-exec daemon
2741     # 2022-08-07 18:44:34.036 [892491] cwd=/var/spool/exim4 5 args: /usr/sbin/exim4 -bd -q30m -C /etc/exim4/my.conf
2742     # 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)
2743     # note: the daemon gives up and dies after retrying those 9 times.
2744     # I came upon this by guessing and trial and error.
2745     setcap CAP_NET_BIND_SERVICE+ei /usr/sbin/exim4
2746     i /etc/exim4/trusted_configs <<'EOF'
2747 /etc/exim4/my.conf
2748 EOF
2749     ;;
2750   *)
2751     # default file
2752     i /etc/default/exim4 <<'EOF'
2753 QUEUERUNNER='combined'
2754 QUEUEINTERVAL='30m'
2755 EOF
2756     ;;
2757 esac
2758
2759 # ** exim non-root
2760
2761 case $HOSTNAME in
2762   bk|je|li)
2763     # no reason to expect it to ever be there.
2764     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2765     ;;
2766   *)
2767     dirs=()
2768     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2769       if [[ -d $d ]]; then
2770         dirs+=($d)
2771       fi
2772     done
2773     i /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2774 [Service]
2775 # see 56.2 Root privilege in exim spec
2776 AmbientCapabilities=CAP_NET_BIND_SERVICE
2777 # https://www.redhat.com/sysadmin/mastering-systemd
2778 # things that seem good and reasonabl.e
2779 PrivateTmp=yes
2780 ProtectHome=yes
2781 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2782 # this whole setting doesnt work. tried it with a newer systemd 250 though
2783 # an nspawn, and it worked there.
2784 InaccessiblePaths=${dirs[@]}
2785 # this gives us the permission denied error:
2786 # socket bind() to port 25 for address (any IPv6) failed: Permission denied
2787 # but we also have to set the file capabilities to avoid the error.
2788 #NoNewPrivileges=yes
2789 ProtectSystem=yes
2790
2791 # when we get newer systemd
2792 #ProtectDevices=yes
2793 EOF
2794     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2795 # see 56.2 Root privilege in exim spec
2796 deliver_drop_privilege = true
2797 EOF
2798     files=(
2799       300_exim4-config_real_local
2800       600_exim4-config_userforward
2801       700_exim4-config_procmail
2802       800_exim4-config_maildrop
2803       mmm_mail4root
2804     )
2805     for f in ${files[@]}; do
2806       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2807     done
2808     ;;
2809 esac
2810
2811 case $HOSTNAME in
2812
2813   # ** $MAIL_HOST|bk|je)
2814   $MAIL_HOST|bk|je)
2815
2816     echo|i /etc/exim4/conf.d/router/870_backup_local
2817
2818     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2819 # note: some things we don't set that are here by default because they are unused.
2820 dc_local_interfaces=''
2821 dc_eximconfig_configtype='internet'
2822 dc_localdelivery='dovecot_lmtp'
2823 EOF
2824     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2825 # recommended if dns is expected to work
2826 CHECK_RCPT_VERIFY_SENDER = true
2827 # default config comment says: If you enable this, you might reject legitimate mail,
2828 # but eggs has had this a long time, so that seems unlikely.
2829 CHECK_RCPT_SPF = true
2830 CHECK_RCPT_REVERSE_DNS = true
2831 CHECK_MAIL_HELO_ISSUED = true
2832
2833
2834 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2835 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2836
2837 # testing dmarc
2838 #dmarc_tld_file = /etc/public_suffix_list.dat
2839
2840 EOF
2841     ;;&
2842
2843   # ** $MAIL_HOST|bk)
2844   $MAIL_HOST|bk)
2845
2846
2847     # no clamav on je, it has 1.5g memory and clamav uses most of it
2848     i /etc/exim4/conf.d/clamav_data_acl <<'EOF'
2849 warn
2850 !hosts = +iank_trusted
2851 !authenticated = plain_server:login_server
2852 condition = ${if def:malware_name}
2853 remove_header = Subject:
2854 add_header = Subject: [Clamav warning: $malware_name] $h_subject
2855 log_message = heuristic malware warning: $malware_name
2856 EOF
2857
2858     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2859 # je.b8.nz will run out of memory with freshclam
2860 av_scanner = clamd:/var/run/clamav/clamd.ctl
2861 EOF
2862
2863     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2864 deny
2865   malware = */defer_ok
2866   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2867   message = This message was detected as possible malware ($malware_name).
2868 EOF
2869
2870     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2871 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2872 # smarthost config type, not sure.
2873 # failing message on mail-tester.com:
2874 # We check if there is a server (A Record) behind your hostname kd.
2875 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2876 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2877 # and this one seemed appropriate from grepping config.
2878 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2879 # mail to kd, so this should basically be a name that no host has as their
2880 # canonical hostname since the actual host sits behind a nat and changes.
2881 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2882 # I used this to avoid sender verification, didnt work but it still
2883 # makes sense based on the spec.
2884 hosts_treat_as_local = defaultnn.b8.nz
2885
2886 # Outside nn, we get the default cert location from a debian macro,
2887 # and the cert file is put in place by a certbot hook.
2888 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2889 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2890 EOF
2891
2892     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2893 gnusmarthost:
2894   debug_print = "R: smarthost for $local_part@$domain"
2895   driver = manualroute
2896   domains = ! +local_domains
2897 # send most mail through eggs, helps fsfs sender reputation.
2898 # uncomment and optionally move to 188 file to send through my own servers again
2899   senders = *@gnu.org
2900   transport = smarthost_dkim
2901   route_list = * fencepost.gnu.org::587 byname
2902   host_find_failed = ignore
2903   same_domain_copy_routing = yes
2904   no_more
2905 EOF
2906
2907     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2908 10.173.8.1 defaultnn.b8.nz
2909 EOF
2910     ;;&
2911   # ** $MAIL_HOST)
2912   $MAIL_HOST)
2913
2914     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2915 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2916 # use vpn transport. lower priority so it overrides the default route.
2917 # Use this in case our vpn fails, we dont send anything without it.
2918 .ifdef DCconfig_internet
2919 dnslookup_vpn:
2920   debug_print = "R: dnslookup for $local_part@$domain"
2921   driver = dnslookup
2922   domains = ! +local_domains
2923   transport = remote_smtp_vpn
2924   same_domain_copy_routing = yes
2925   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
2926   no_more
2927 .endif
2928 EOF
2929
2930
2931     # note on backups: I used to do an automatic sshfs and restricted
2932     # permissions to a specific directory on the remote server, /bu/mnt,
2933     # which required using a dedicated user, but realized smtp will be
2934     # more reliable and less fuss. If I ever need that again, see the
2935     # history of this file, and bum in brc2.
2936     i /etc/exim4/conf.d/router/161_backup_redir_nn <<'EOF'
2937 backup_redir_nn:
2938 driver = redirect
2939 # b is just an arbirary short string
2940 data = b@eximbackup.b8.nz
2941 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2942 # note, to test this, i could temporarily allow testignore.
2943 # alerts avoids potential mail loop. root is already
2944 # redirected earlier, so that is just being overly cautious.
2945 local_parts = ! root : ! testignore : ! alerts
2946 unseen = true
2947 errors_to = alerts@iankelling.org
2948 EOF
2949
2950
2951
2952     # This allows for forwarded mail to not get most rcpt checks, especially SPF,
2953     # which would incorrectly get denied.
2954     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2955 mail.fsf.org
2956 *.posteo.de
2957 EOF
2958
2959     # cron email from smarthost hosts will automatically be to
2960     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2961     # case that doesn't work, we still want to accept that mail, but not
2962     # from any host except the smarthosts. local_hostnames and this rule
2963     # is for that purpose.
2964     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2965 deny
2966   !authenticated = *
2967   domains = +local_hostnames
2968   message = no relay
2969 EOF
2970     echo|i /etc/exim4/conf.d/router/880_universal_forward
2971
2972
2973     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2974 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
2975 EOF
2976
2977
2978     i /etc/exim4/conf.d/router/186_sentarchive_nn <<'EOF'
2979 # ian: save a copy of sent mail. i thought of other ways to
2980 # do this, for example, to only save sent mail that is not sent
2981 # from my mail client which saves a copy by default, but in the
2982 # end, it seems simplest to turn that off. We want to save
2983 # external mail sent by smarthosts.
2984 sentarchive_nn:
2985   driver = redirect
2986   domains = ! +local_domains
2987   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2988   data    = vojdedIdNejyebni@b8.nz
2989   unseen
2990 EOF
2991
2992
2993     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2994     # and also have mail.iankelling.org whitelisted as a relay domain.
2995     # I could avoid that if I changed this to submit to 587 with a
2996     # password like a standard mua.
2997     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2998 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2999 # replaced DCsmarthost with hostname
3000 fsfsmarthost:
3001   debug_print = "R: smarthost for $local_part@$domain"
3002   driver = manualroute
3003   domains = ! +local_domains
3004   senders = *@fsf.org
3005   transport = remote_smtp_smarthost
3006   route_list = * mail.fsf.org::587 byname
3007   host_find_failed = ignore
3008   same_domain_copy_routing = yes
3009   no_more
3010
3011 posteosmarthost:
3012   debug_print = "R: smarthost for $local_part@$domain"
3013   driver = manualroute
3014   domains = ! +local_domains
3015   senders = *@posteo.net
3016   transport = remote_smtp_smarthost
3017   route_list = * posteo.de::587 byname
3018   host_find_failed = ignore
3019   same_domain_copy_routing = yes
3020   no_more
3021 EOF
3022
3023     # Greping /etc/exim4, unqualified mails this would end up as
3024     # a return path, so it should go somewhere we will see.
3025     # The debconf output about mailname is as follows:
3026     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
3027     # name.
3028     # This name will also be used by other programs. It should be the single, fully
3029     # qualified domain name (FQDN).
3030     # Thus, if a mail address on the local host is foo@example.org, the correct value for
3031     # this option would be example.org.
3032     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
3033     echo iankelling.org > /etc/mailname
3034
3035
3036     # mail.iankelling.org so local imap clients can connect with tls and
3037     # when they happen to not be local.
3038     # todo: this should be 10.8.0.4
3039
3040     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3041 # note: i put nn.b8.nz into bind for good measure
3042 10.173.8.2 nn.b8.nz mx.iankelling.org
3043 EOF
3044
3045     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
3046     # weve configured this file in dnsmasq if we are using it.
3047     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
3048 server=/mx.iankelling.org/127.0.1.1
3049 EOF
3050     # I used to use debconf-set-selections + dpkg-reconfigure,
3051     # which then updates this file
3052     # but the process is slower than updating it directly and then I want to set other things in
3053     # update-exim4.conf.conf, so there's no point.
3054     # The file is documented in man update-exim4.conf,
3055     # except the man page is not perfect, read the bash script to be sure about things.
3056
3057     # The debconf questions output is additional documentation that is not
3058     # easily accessible, but super long, along with the initial default comment in this
3059     # file, so I've saved that into ./mail-notes.conf.
3060     #
3061     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
3062     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3063 # man page: is used to build the local_domains list, together with "localhost"
3064 # this is duplicated in a later router.
3065 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
3066 EOF
3067
3068
3069     # dmarc. not used currently
3070     f=/etc/cron.daily/refresh-dmarc-tld-file
3071     cat >$f <<'EOF'
3072 #!/bin/bash
3073 cd /etc
3074 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
3075 EOF
3076     m chmod 755 $f
3077
3078     ;;
3079   # ** bk
3080   ## we use this host to monitor MAIL_HOST and host a mail server for someone
3081   bk)
3082
3083
3084     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3085 10.173.8.2 nn.b8.nz
3086 EOF
3087
3088     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
3089 s,/etc/default/exim4,/etc/default/exim4in,g
3090 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
3091 s,(^[ #]*Provides:).*,\1 exim4in,
3092 s,(^[ #]*NAME=).*,\1"exim4in",
3093 EOF
3094     chmod +x /etc/init.d/exim4in
3095     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
3096 [Unit]
3097 # needed to continually restart
3098 StartLimitIntervalSec=0
3099
3100 [Service]
3101 Restart=always
3102 # time to sleep before restarting a service
3103 RestartSec=20
3104 EOF
3105
3106     i /etc/default/exim4in <<'EOF'
3107 # defaults but no queue runner and alternate config dir
3108 QUEUERUNNER='no'
3109 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
3110 UPEX4OPTS='-d /etc/myexim4'
3111 EOF
3112
3113     echo bk.b8.nz > /etc/mailname
3114     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3115 # man page: is used to build the local_domains list, together with "localhost"
3116 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
3117 EOF
3118
3119     ;;
3120   # ** je
3121   je)
3122     echo je.b8.nz > /etc/mailname
3123     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3124 dc_other_hostnames='je.b8.nz'
3125 EOF
3126     ;;
3127   # ** not MAIL_HOST|bk|je
3128   *)
3129     # this one should be removed for all non mail hosts, but
3130     # bk and je never become mail_host
3131     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
3132     echo|i /etc/exim4/conf.d/router/160_backup_redir
3133     echo|i /etc/exim4/conf.d/router/161_backup_redir_nn
3134     echo|i /etc/exim4/conf.d/router/185_sentarchive
3135     echo|i /etc/exim4/conf.d/router/186_sentarchive_nn
3136     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
3137     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
3138     echo|i /etc/exim4/conf.d/rcpt_local_acl
3139     echo|i /etc/exim4/conf.d/main/000_local-nn
3140     echo|i /etc/exim4/conf.d/clamav_data_acl
3141
3142
3143     if $bhost_t; then
3144       cat >>/etc/exim4/conf.d/main/000_local <<EOF
3145 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
3146 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
3147 # so we can maintiain the originals of the backups.
3148 # we wouldnt want this if we were dealing with any other
3149 # local deliveries, but we sent all others to the smarthost
3150 # which then strips the headers.
3151 envelope_to_remove = false
3152 return_path_remove = false
3153 EOF
3154     fi
3155
3156     # catches things like cronjob email
3157     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
3158 universal_forward:
3159   driver = redirect
3160   domains = +local_domains
3161   data = alerts@iankelling.org
3162 EOF
3163
3164
3165     for unit in ${nn_progs[@]}; do
3166       f=/etc/systemd/system/$unit.service.d/nn.conf
3167       rm -fv $f
3168     done
3169
3170     # dont i dont care if defaultnn section gets left, it wont
3171     # get used.
3172     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
3173     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
3174
3175     # note: condition duplicated at else
3176     if $bhost_t; then
3177       install -d /bu
3178       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
3179       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
3180         chown -R Debian-exim:Debian-exim /bu/md
3181       fi
3182       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
3183 # modified debian maildir transport
3184 backup_maildir:
3185   driver = appendfile
3186   directory = /bu/md
3187   delivery_date_add
3188   # note, no return path or envelope added
3189   maildir_format
3190   directory_mode = 0700
3191   mode = 0644
3192   mode_fail_narrower = false
3193 EOF
3194
3195       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
3196 ### router/900_exim4-config_local_user
3197 #################################
3198
3199 backup_local:
3200   debug_print = "R: local_user for $local_part@$domain"
3201   driver = accept
3202   domains = eximbackup.b8.nz
3203   transport = backup_maildir
3204 EOF
3205
3206       # Bind to wghole to receive mailbackup.
3207       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
3208       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3209 dc_other_hostnames='eximbackup.b8.nz'
3210 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
3211 EOF
3212
3213       # wghole & thus exim will fail to start without internet connectivity.
3214       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
3215 [Unit]
3216 StartLimitIntervalSec=0
3217
3218 [Service]
3219 Restart=always
3220 RestartSec=20
3221 EOF
3222
3223     else  # if $bhost_t; then
3224       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3225 # Note: If theres like a temporary problem where mail gets sent to
3226 # one of these hosts, if exim isnt listening, it will be a temporary error
3227 # instead of a permanent 5xx.
3228 dc_local_interfaces='127.0.0.1;::1'
3229 EOF
3230       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
3231     fi
3232     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3233 dc_eximconfig_configtype='smarthost'
3234 dc_smarthost='$smarthost'
3235 EOF
3236
3237     hostname -f |i /etc/mailname
3238     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3239 # The manpage incorrectly states this will do header rewriting, but
3240 # that only happens if we have dc_hide_mailname is set.
3241 dc_readhost='iankelling.org'
3242 # Only used in case of bounces.
3243 dc_localdelivery='maildir_home'
3244 EOF
3245     ;;
3246 esac
3247
3248
3249
3250
3251 # ** $MAILHOST|bk, things that belong at the end
3252 case $HOSTNAME in
3253   $MAIL_HOST|bk)
3254     # config for the non-nn exim. note, it uses not default dir, but we
3255     # generate that into the default config file
3256     m rsync -ra --delete --delete-excluded \
3257       --exclude=/conf.d/router/161_backup_redir_nn \
3258       --exclude=/conf.d/router/186_sentarchive_nn \
3259       --exclude=/conf.d/main/000_local-nn /etc/exim4/ /etc/myexim4
3260     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3261 # this makes it easier to see which exim is doing what
3262 log_file_path = /var/log/exim4/my%s
3263 EOF
3264
3265
3266
3267     cat >/etc/logrotate.d/myexim <<'EOF'
3268 /var/log/exim4/mymain /var/log/exim4/myreject {
3269         daily
3270         missingok
3271         rotate 1000
3272         delaycompress
3273         notifempty
3274         nocreate
3275 }
3276 /var/log/exim4/mypanic {
3277         size 10M
3278         missingok
3279         rotate 10
3280         compress
3281         delaycompress
3282         notifempty
3283         nocreate
3284 }
3285 EOF
3286
3287     # If we ever wanted to have a separate spool,
3288     # we could do it like this.
3289     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3290     # spool_directory = /var/spool/myexim4
3291     # EOF
3292     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3293 dc_eximconfig_configtype='smarthost'
3294 dc_smarthost='nn.b8.nz'
3295 EOF
3296     ;;&
3297   bk)
3298
3299     # config for the non-nn exim
3300     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3301 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3302 EOF
3303     ;;
3304   $MAIL_HOST)
3305
3306
3307     i /etc/myexim4/conf.d/router/185_sentarchive <<'EOF'
3308 sentarchive:
3309   driver = redirect
3310   domains = ! +local_domains
3311   senders = <; *@fsf.org ; *@posteo.net
3312   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3313   data    = vojdedIdNejyebni@b8.nz
3314   unseen
3315 EOF
3316
3317
3318     i /etc/myexim4/conf.d/router/160_backup_redir <<'EOF'
3319 backup_redir:
3320 driver = redirect
3321 # i dont email myself from my own machine much, so lets ignore that.
3322 domains = ! +local_domains
3323 senders = <; *@fsf.org ; *@posteo.net
3324 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3325 # b is just an arbirary short string
3326 data = b@eximbackup.b8.nz
3327 # note, to test this, i could temporarily allow testignore.
3328 # alerts avoids potential mail loop.
3329 local_parts = ! root : ! testignore : ! alerts : ! daylert
3330 unseen = true
3331 errors_to = alerts@iankelling.org
3332 EOF
3333
3334
3335
3336     # for bk, we have a exim4in.service that will do this for us.
3337     m update-exim4.conf -d /etc/myexim4
3338     ;;
3339 esac
3340
3341 # * spool dir setup
3342
3343 # ** bind mount setup
3344 # put spool dir in directory that spans multiple distros.
3345 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3346 #
3347 dir=/nocow/exim4
3348 sdir=/var/spool/exim4
3349 # we only do this if our system has $dir
3350
3351 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3352 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3353 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3354 # so, im trying a bind mount to get rid of that.
3355 if [[ -e /nocow ]]; then
3356   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3357     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3358   fi
3359   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3360 [Unit]
3361 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3362 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3363 After=local-fs.target
3364
3365 [Service]
3366 ExecStartPre=/usr/local/bin/exim-nn-iptables
3367 EOF
3368   if ! mountpoint -q $sdir; then
3369     stopifactive exim4 exim4in
3370     if [[ -L $sdir ]]; then
3371       m rm $sdir
3372     fi
3373     if [[ ! -e $dir && -d $sdir ]]; then
3374       m mv $sdir $dir
3375     fi
3376     if [[ ! -d $sdir ]]; then
3377       m mkdir $sdir
3378       m chmod 000 $sdir # only want it to be used when its mounted
3379     fi
3380     m mount $sdir
3381   fi
3382 fi
3383
3384
3385
3386 # ** exim/spool uid setup
3387 # i have the spool directory be common to distro multi-boot, so
3388 # we need the uid to be the same. 608 cuz it's kind of in the middle
3389 # of the free system uids.
3390 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3391 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3392 if [[ ! $uid ]]; then
3393   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3394   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3395     --no-create-home --disabled-login --force-badname Debian-exim
3396 elif [[ $uid != 608 ]]; then
3397   stopifactive exim4 exim4in
3398   m usermod -u 608 Debian-exim
3399   m groupmod -g 608 Debian-exim
3400   m usermod -g 608 Debian-exim
3401   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3402   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3403 fi
3404
3405 # * start / stop services
3406
3407 reifactive dnsmasq nscd
3408
3409 if $reload; then
3410   m systemctl daemon-reload
3411 fi
3412
3413 # checking bhost_t is redundant, but could help us catch errors.
3414 if $bhost_t || [[ -e /etc/wireguard/wghole.conf ]]; then
3415   # todo: in mail-setup, we have a static list of backup hosts, not *y
3416   m systemctl --now enable wg-quick@wghole
3417 fi
3418
3419 sysd-prom-fail-install epanicclean
3420 m systemctl --now enable epanicclean
3421
3422 case $HOSTNAME in
3423   je)
3424     /a/exe/web-conf apache2 je.b8.nz
3425     ;;
3426   bk)
3427     /a/exe/web-conf apache2 mail2.iankelling.org
3428     ;;
3429 esac
3430
3431 m /a/bin/ds/mail-cert-cron -1
3432 sre mailcert.timer
3433
3434 case $HOSTNAME in
3435   $MAIL_HOST|bk)
3436     m systemctl --now enable mailnn mailnnroute
3437     ;;&
3438   $MAIL_HOST)
3439     # we use dns to start wg
3440     if $reload; then
3441       sre unbound
3442     else
3443       m systemctl --now enable unbound
3444     fi
3445     ;;&
3446   $MAIL_HOST|bk)
3447     # If these have changes, id rather manually restart it, id rather
3448     # not restart and cause temporary errors
3449     if $reload; then
3450       sre $vpnser
3451     else
3452       m systemctl --now enable $vpnser
3453     fi
3454     if ! systemctl is-active clamav-daemon >/dev/null; then
3455       m systemctl --now enable clamav-daemon
3456       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3457       if [[ $out ]]; then
3458         reload=true
3459       fi
3460
3461       # note, this will cause paniclog entries because it takes like 45
3462       # seconds for clamav to start, i use ./epanic-clean to remove
3463       # them.
3464     fi
3465     ;;&
3466   $MAIL_HOST|bk|je)
3467     # start spamassassin/dovecot before exim.
3468     sre dovecot spamassassin
3469     # need to wait a bit before restarting exim, else I
3470     # get a paniclog entry like: spam acl condition: all spamd servers failed
3471     sleep 3
3472     m systemctl --now enable mailclean.timer
3473     ;;&
3474   $MAIL_HOST)
3475     # < 2.1 (eg: in t9), uses a different data format which required manual
3476     # migration. dont start if we are running an old version.
3477     if dpkg --compare-versions "$(dpkg -s radicale | awk '$1 == "Version:" { print $2 }')" ge 2.1; then
3478       m systemctl --now enable radicale
3479     fi
3480     ;;&
3481 esac
3482
3483 # for debugging dns issues
3484 case $HOSTNAME in
3485   je|bk)
3486     systemctl enable --now logrotate-fast.timer
3487     ;;
3488 esac
3489
3490 # last use of $reload happens in previous block
3491 rm -f /var/local/mail-setup-reload
3492
3493
3494 case $HOSTNAME in
3495   $MAIL_HOST|bk|je|li)
3496     # on li, these are never started, except $vpnser
3497     :
3498     ;;
3499   *)
3500     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3501     ;;
3502 esac
3503
3504 sre exim4
3505
3506 case $HOSTNAME in
3507   $MAIL_HOST)
3508     m systemctl --now enable mailbindwatchdog
3509     ;;
3510   *)
3511     soff mailbindwatchdog
3512     ;;
3513 esac
3514
3515
3516 case $HOSTNAME in
3517   bk) sre exim4in ;;
3518 esac
3519
3520 # * mail monitoring / testing
3521
3522 # note, to test clamav, send an email with body that only contains
3523 # https://en.wikipedia.org/wiki/EICAR_test_file
3524 # which set malware_name to Eicar-Signature
3525 case $HOSTNAME in
3526   $MAIL_HOST|bk|je)
3527     # note: cronjob "ian" also does some important monitoring
3528     # todo: this will sometimes cause an alert because mailtest-check will run
3529     # before we have setup network namespace and spamassassin
3530     i /etc/cron.d/mailtest <<EOF
3531 SHELL=/bin/bash
3532 PATH=/usr/bin:/bin:/usr/local/bin
3533 MAILTO=daylert@iankelling.org
3534 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3535 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3536 # if a bounce happened yesterday, dont let it slip through the cracks
3537 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3538 EOF
3539
3540
3541     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3542       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3543     i /etc/systemd/system/mailtest-check.service <<'EOF'
3544 [Unit]
3545 Description=mailtest-check
3546 After=local-fs.target
3547 StartLimitIntervalSec=0
3548
3549 [Service]
3550 Type=simple
3551 ExecStart=/usr/local/bin/mailtest-check slow
3552 Restart=always
3553 RestartSec=60
3554
3555 [Install]
3556 WantedBy=graphical.target
3557 EOF
3558     sysd-prom-fail-install mailtest-check
3559     sre mailtest-check
3560     ;;&
3561   $MAIL_HOST)
3562     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3563     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3564
3565     cat >>/etc/cron.d/mailtest <<EOF
3566 # 10 am friday
3567 0   10 * * 5  root echo "weekly alert. You are not in the matrix."
3568 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3569 EOF
3570     ;;&
3571   bk)
3572     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3573     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3574     # We dont need to send from different addresses to the same
3575     # address. this breaks down our nice elegant logic of building up
3576     # froms and tos , so I just handle expertpath in a special case
3577     # below and set the to: to be testignore@zroe.org.  If we did sent
3578     # that way, it would also mess up our mailtest-check logic that
3579     # finds which messages to check.
3580     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3581     # that would become 2 messages and we'd only check 1.
3582     ;;&
3583   je)
3584     test_froms=(testignore@je.b8.nz)
3585     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3586     ;;&
3587   $MAIL_HOST|bk|je)
3588
3589     # Dont put these test messages into the sent folder or else it will
3590     # overwhelm it, plus i dont want to save a copy at all.
3591     # Plus addresses we generally want to ignore.
3592     i /etc/exim4/ignore-sent <<EOF
3593 $(printf "%s\n" ${test_tos[@]})
3594 vojdedIdNejyebni@b8.nz
3595 b@eximbackup.b8.nz
3596 EOF
3597
3598     cat >/usr/local/bin/send-test-forward <<'EOF'
3599 #!/bin/bash
3600 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3601 olds=(
3602 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3603 )
3604 if (( ${#olds[@]} )); then
3605   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3606 fi
3607 EOF
3608     for test_from in ${test_froms[@]}; do
3609
3610       test_to=${test_tos[0]}
3611       for t in ${test_tos[@]:1}; do
3612         test_to+=", $t"
3613       done
3614       case $test_from in
3615         testignore@expertpathologyreview.com)
3616           test_to=testignore@zroe.org
3617           ;;
3618       esac
3619
3620       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3621 /usr/sbin/exim -odf -f $test_from -t <<EOF
3622 From: $test_from
3623 To: $test_to
3624 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3625
3626 /usr/local/bin/send-test-forward
3627 EOF
3628 EOFOUTER
3629     done
3630     m chmod +x /usr/local/bin/send-test-forward
3631     ;;
3632   *)
3633     soff mailtest-check.service
3634     rm -fv /etc/cron.d/mailtest \
3635        /var/lib/prometheus/node-exporter/mailtest-check.prom* \
3636        /var/local/cron-errors/check-remote-mailqs*
3637     ;;
3638 esac
3639
3640
3641
3642 # * misc
3643 m sudo -u $u mkdir -p /home/$u/.cache
3644 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3645 while (($#)); do
3646   target=$1
3647   f=$2
3648   shift 2
3649   if [[ ! -L $f ]]; then
3650     if [[ -e $f ]]; then
3651       rm -rf $f
3652     fi
3653     m sudo -u $u ln -sf -T $target $f
3654   fi
3655 done
3656
3657
3658 # /etc/alias setup is debian specific, and exim postinst script sets up
3659 # an /etc/alias from root to the postmaster, based on the question
3660 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3661 # root, or there was no preexisting aliases file. postfix won\'t set up
3662 # a root to $postmaster alias if it\'s already installed. Easiest to
3663 # just set it ourselves.
3664
3665 # debconf question for postmaster:
3666 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3667 # to the user account of the actual system administrator.
3668 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3669 # recommended.
3670 # Note that postmaster\'s mail should be read on the system to which it is directed,
3671 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3672 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3673 # force local delivery.
3674 # Multiple user names need to be separated by spaces.
3675 # Root and postmaster mail recipient:
3676
3677 m exit 0
3678 :
3679
3680 # Local Variables:
3681 # eval: (outline-minor-mode)
3682 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3683 # End:
3684 # this is combined with defining outline-level in init.el