2 # -*- eval: (outline-minor-mode); -*-
4 # Copyright (C) 2019 Ian Kelling
5 # SPDX-License-Identifier: AGPL-3.0-or-later
7 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
10 m
() { printf "$pre %s\n" "$*"; "$@"; }
11 e
() { printf "$pre %s\n" "$*"; }
12 err
() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $0: $*" >&2; }
15 # TODO: copy dkim keys from within this file. its now done in conflink.
16 # TODO: fix dkim key to b chmod 640, group Debian-exim
18 if [[ -s /usr
/local
/lib
/err
]]; then
19 source /usr
/local
/lib
/err
20 elif [[ -s /a
/bin
/errhandle
/err
]]; then
21 source /a
/bin
/errhandle
/err
23 err
"no err tracing script found"
27 [[ $EUID == 0 ]] ||
exec sudo
-E "${BASH_SOURCE[0]}" "$@"
28 if [[ ! $SUDO_USER ]]; then
29 echo "$0: error: requires running as nonroot or sudo"
38 Setup exim4 & dovecot & related things
40 The minimal assumption we have is that /etc/mailpass exists
43 -h|--help Print help and exit.
50 ####### instructions for icedove #####
51 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password
52 # we could also just use 127.0.0.1 with no ssl, but todo: disable that in dovecot, so mail is secure from local programs.
54 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
55 # background: ovecot does not yet have ocsp stapling support
56 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
58 # for phone, same thing but username alerts, pass in ivy-pass.
62 # * perstent password instructions
64 # # for hosts which have all private files I just use the same user
65 # # for other hosts, each one get\'s their own password.
66 # # for generating secure pass, and storing for server too:
67 # # user=USUALLY_SAME_AS_HOSTNAME
70 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
71 # s sed -i "/^$user:/d" /p/c/filesystem/etc/exim4/passwd
72 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
73 # # todo: port is no longer used in mailpass, remove it.
74 # echo "mail.iankelling.org 587 $user:$(<$f)" >> /p/c/machine_specific/$user/filesystem/etc/mailpass
75 # # then run this script, or part of it which uses /etc/mailpass
77 # # dovecot password, i just need 1 as I\'m the only user
78 # mkdir /p/c/filesystem/etc/dovecot
79 # echo "iank:$(doveadm pw -s ssha256)::::::" >>/p/c/filesystem/etc/dovecot/users
84 # # for ad-hoc testing of some random new host sending mail:
85 # user=li # client host username & hostname
87 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
88 # s sed -i "/^$user:/d" /etc/exim4/passwd
89 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" | s tee -a /etc/exim4/passwd
90 # echo "mail.iankelling.org:$user:$(<$f)" | ssh root@$user dd of=/etc/exim4/passwd.client
91 ####### end perstent password instructions ######
94 # * persistent dkim/dns instructions
95 # # Remove 1 level of comments in this section, set the domain var
96 # # for the domain you are setting up, then run this and copy dns settings
98 # domain=iankelling.org
99 # c /p/c/filesystem/etc/exim4
100 # # this has several bugs addressed in comments, but it was helpful
101 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
103 # openssl genrsa -out $domain-private.pem 2048 -outform PEM
104 # openssl rsa -in $domain-private.pem -out $domain.pem -pubout -outform PEM
105 # # selector is needed for having multiple keys for one domain.
106 # # I dun do that, so just use a static one: li
107 # echo "txt record name: li._domainkey.$domain"
108 # # Debadmin page does not have v=, fastmail does, and this
109 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
110 # # https://www.ietf.org/rfc/rfc6376.txt
111 # # Join and print all but first and last line.
112 # # last line: swap hold & pattern, remove newlines, print.
113 # # lines 2+: append to hold space
114 # echo "txt record contents:"
115 # echo "v=DKIM1; k=rsa; p=$(sed -n '${x;s/\n//gp};2,$H' $domain.pem)"
116 # chmod 644 $domain.pem
117 # chmod 640 $domain-private.pem
118 # # in conflink, we chown these to group debian
120 # # selector was also put into /etc/exim4/conf.d/main/000_local,
121 # # via the mail-setup scripts
123 # # 2017-02 dmarc policies:
124 # # host -t txt _dmarc.gmail.com
125 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
126 # # there were articles claiming gmail would be changing
127 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
128 # # expected to cause problems
129 # # with a few old mailing lists, copying theirs for now.
131 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
133 # # 2017-02 spf policies:
134 # # host -t txt lists.fedoraproject.org
135 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
136 # # i include fastmail\'s settings, per their instructions,
137 # # and follow their policy. In mail in a box, or similar instructions,
138 # # I\'ve seen recommended to not use a restrictive policy.
140 # # to check if dns has updated, you do
141 # host -a mesmtp._domainkey.$domain
144 # # setting it to iankelling.org would work the same, but this
145 # # is more flexible, I could change where mail.iankelling.org pointed.
147 # mx records, 2 records each, for * and empty domain
148 # pri 10 mail.iankelling.org
150 ####### end persistent dkim instructions #########
153 # * functions constants
154 e
() { printf "%s\n" "$*"; }
155 pi
() { # package install
157 if dpkg
-s -- "$@" &> /dev
/null
; then
160 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
161 f
=/var
/cache
/apt
/pkgcache.bin
;
162 if [[ ! -r $f ]] ||
(( $
(( $
(date +%s
) - $
(stat
-c %Y
$f ) )) > 60*60*12 )); then
165 DEBIAN_FRONTEND
=noninteractive m apt-get
-y install --purge --auto-remove "$@"
169 mxhost
=mail.iankelling.org
173 # old setup. left as comment for example
174 # mxhost=mail.messagingengine.com
176 # forward=ian@iankelling.org
178 smarthost
="$mxhost::$mxport"
180 ## * Install packages
181 # light version of exim does not have sasl auth support.
182 pi exim4-daemon-heavy spamassassin spf-tools-perl openvpn dnsmasq
184 # trisquel 8 = openvpn, debian stretch = openvpn-client
185 vpn_ser
=openvpn-client
186 if [[ ! -e /lib
/systemd
/system
/openvpn-client@.service
]]; then
190 uhome
=$
(eval echo ~
$u)
191 ### * user forward file
192 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
193 # afaik, these will get ignored because they are routing to my own
194 # machine, but rm them is safer
195 rm -fv $uhome/.forward
/root
/.forward
197 # this can\'t be a symlink and has permission restrictions
198 # it might work in /etc/aliases, but this seems more proper.
199 e setting
$uhome/.forward to
$forward
200 install -m 644 {-o,-g}$u <(e
$forward) $uhome/.forward
203 # * Mail clean cronjob
205 cat >/etc
/systemd
/system
/mailclean.timer
<<'EOF'
207 Description=Run mailclean daily
213 WantedBy=timers.target
216 cat >/etc
/systemd
/system
/mailclean.service
<<EOF
218 Description=Delete and archive old mail files
219 After=multi-user.target
224 ExecStart=/a/bin/log-quiet/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
227 systemctl daemon-reload
232 if [[ $HOSTNAME != "$MAIL_HOST" ]]; then
233 m systemctl stop spamassassin
234 m systemctl disable spamassassin
238 sed -i '/^\s*CRON\s*=/d' /etc
/default
/spamassassin
239 e CRON
=1 >>/etc
/default
/spamassassin
240 # just noticed this in the config file, seems like a good idea.
241 sed -i '/^\s*NICE\s*=/d' /etc
/default
/spamassassin
242 e
'NICE="--nicelevel 15"' >>/etc
/default
/spamassassin
244 m systemctl
enable spamassassin
245 m systemctl start spamassassin
246 m systemctl reload spamassassin
248 cat >/etc
/systemd
/system
/spamddnsfix.service
<<'EOF'
250 Description=spamd dns bug fix cronjob
254 ExecStart=/a/bin/distro-setup/spamd-dns-fix
256 # 2017-09, debian closed the bug on this saying upstream had fixed it.
257 # remove this when i\'m using the newer package, ie, debian 10, or maybe
259 cat >/etc
/systemd
/system
/spamddnsfix.timer
<<'EOF'
261 Description=run spamd bug fix script every 10 minutes
265 # the script looks back 9 minutes into the journal,
266 # it takes a second to run,
267 # so lets run every 9 minutes and 10 seconds.
271 WantedBy=timers.target
273 m systemctl daemon-reload
274 m systemctl restart spamddnsfix.timer
275 m systemctl
enable spamddnsfix.timer
277 fi # [[ $HOSTNAME != "$MAIL_HOST" ]]
278 ##### end spamassassin config
282 if [[ -e /p
/c
/filesystem
]]; then
283 # allow failure of these commands when our internet is down, they are likely not needed,
284 # we check that a valid cert is there already.
285 # to put the hostname in the known hosts
286 if ! ssh -o StrictHostKeyChecking
=no root@li.iankelling.org
:; then
287 # This just causes failure if our cert is going to expire in the next 30 days.
288 # Certs I generate last 10 years.
289 openssl x509
-checkend $
(( 60 * 60 * 24 * 30 )) -noout -in /etc
/openvpn
/mail.crt
291 # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
292 # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
293 # after my internet was down for a bit:
294 # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
295 m
/a
/exe
/vpn-mk-client-cert
-b mail -n mail -s /b
/ds
/mail-route li.iankelling.org
301 f
=/usr
/local
/bin
/mail-cert-cron
305 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
307 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
309 f=/a/bin/bash_unpublished/source-state
313 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
314 local_mx=mail.iankelling.org
315 rsync_common="rsync -ogtL --chown=root:Debian-exim --chmod=640 root@li.iankelling.org:/etc/letsencrypt/live/$local_mx/"
316 ${rsync_common}fullchain.pem /etc/exim4/exim.crt
318 ${rsync_common}privkey.pem /etc/exim4/exim.key
320 if [[ $ret != $new_ret ]]; then
321 echo "$0: error: differing rsync returns, $ret, $new_ret"
325 if [[ $new_ret != 0 ]]; then
326 if ! openssl x509 -checkend $(( 60 * 60 * 24 * 3 )) -noout -in /etc/exim4/exim.crt; then
327 echo "$0: error!: cert rsync failed and it will expire in less than 3 days"
335 cat >/etc
/systemd
/system
/mailcert.service
<<'EOF'
337 Description=Mail cert rsync
338 After=multi-user.target
342 ExecStart=/a/bin/log-quiet/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
345 cat >/etc
/systemd
/system
/mailcert.timer
<<'EOF'
347 Description=Run mail-cert once a day
353 WantedBy=timers.target
355 m systemctl daemon-reload
356 m systemctl start mailcert
357 m systemctl restart mailcert.timer
358 m systemctl
enable mailcert.timer
362 # * common exim4 config
363 source /a
/bin
/bash_unpublished
/source-state
366 ### make local bounces go to normal maildir
367 # local mail that bounces goes to /Maildir or /root/Maildir
368 dirs=(/m
/md
/bounces
/{cur
,tmp
,new
})
369 m mkdir
-p ${dirs[@]}
370 m chown
-R $u:Debian-exim
/m
/md
/bounces
371 m
chmod 775 ${dirs[@]}
372 m usermod
-a -G Debian-exim
$u
373 for d
in /Maildir
/root
/Maildir
; do
374 if [[ ! -L $d ]]; then
377 m
ln -sf -T /m
/md
/bounces
$d
381 ### begin setup passwd.client
382 f
=/etc
/exim
4/passwd.client
383 rm -fv /etc
/exim
4/passwd.client
384 m
install -m 640 -g Debian-exim
/dev
/null
$f
385 while read -r domain _ pass
; do
386 # reference: exim4_passwd_client(5)
387 printf "%s:%s\n" "$domain" "$pass" >>$f
389 ### end setup passwd.client
391 # by default, only 10 days of logs are kept. increase that.
392 m
sed -ri 's/^(\s*rotate\s).*/\11000/' /etc
/logrotate.d
/exim4-base
395 ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
396 # i only need .forwards, so just doing that one.
397 cd /etc
/exim
4/conf.d
/router
398 b
=userforward_higher_priority
399 # replace the router name so it is unique
400 sed -r s
/^
\\S
+:/$b:/ 600_exim4-config_userforward
>175_
$b
403 rm -vf /etc
/exim
4/conf.d
/main
/000_localmacros
# old filename
404 cat >/etc
/exim
4/conf.d
/main
/000_local
<<EOF
405 MAIN_TLS_ENABLE = true
407 # debian exim config added this in 2016 or so?
408 # it's part of the smtp spec, to limit lines to 998 chars
409 # but a fair amount of legit mail does not adhere to it. I don't think
410 # this should be default, like it says in
411 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
412 # todo: the bug for introducing this was about headers, but
413 # the fix maybe is for all lines? one says gmail rejects, the
414 # other says gmail does not reject. figure out and open a new bug.
415 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
418 MAIN_LOG_SELECTOR = +all
421 # normally empty, I set this so I can set the envelope address
422 # when doing mail redelivery to invoke filters. Also allows
423 # me exiqgrep and stuff.
424 MAIN_TRUSTED_GROUPS = $u
427 rm -fv /etc
/exim
4/rcpt_local_acl
# old path
428 cat >/etc
/exim
4/conf.d
/rcpt_local_acl
<<'EOF'
429 # Only hosts we control send to @mail.iankelling.org, so make sure
430 # they are all authed.
431 # Note, if we wanted authed senders for all domains,
432 # we could make this condition in acl_check_mail
434 message = ian trusted domain recepient but no auth
436 domains = mail.iankelling.org
438 rm -fv /etc
/exim
4/data_local_acl
# old path
439 cat >/etc
/exim
4/conf.d
/data_local_acl
<<'EOF'
440 # Except for the "condition =", this was
441 # a comment in the check_data acl. The comment about this not
442 # being suitable is mostly bs. The only thing related I found was to
443 # add the condition =, cuz spamassassin has problems with big
444 # messages and spammers don't bother with big messages,
445 # but I've increased the size from 10k
446 # suggested in official docs, and 100k in the wiki example because
447 # those docs are rather old and I see a 110k spam message
448 # pretty quickly looking through my spam folder.
450 condition = ${if < {$message_size}{2000K}}
451 spam = Debian-exim:true
452 add_header = X-Spam_score: $spam_score\n\
453 X-Spam_score_int: $spam_score_int\n\
454 X-Spam_bar: $spam_bar\n\
455 X-Spam_report: $spam_report
458 # spf = pass:fail:softfail:none:neutral:permerror:temperror
459 # dmarc_status = reject:quarantine
460 # add_header = Reply-to: dmarctest@iankelling.org
463 cat >/etc
/exim
4/conf.d
/auth
/29_exim4-config_auth
<<'EOF'
464 # from 30_exim4-config_examples
469 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
470 server_set_id = $auth2
472 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
473 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
477 cat >/etc
/exim
4/conf.d
/router
/900_exim4-config_local_user
<<'EOF'
478 ### router/900_exim4-config_local_user
479 #################################
481 # This router matches local user mailboxes. If the router fails, the error
482 # message is "Unknown user".
485 debug_print = "R: local_user for $local_part@$domain"
487 domains = +local_domains
488 # ian: commented this, in conjunction with a dovecot lmtp
489 # change so I get mail for all users.
492 transport = LOCAL_DELIVERY
493 cannot_route_message = Unknown user
495 cat >/etc
/exim
4/conf.d
/transport
/30_exim4-config_dovecot_lmtp
<<'EOF'
498 socket = /var/run/dovecot/lmtp
499 #maximum number of deliveries per batch, default 1
503 cat >/etc
/exim
4/host_local_deny_exceptions
<<'EOF'
508 cat >/etc
/exim
4/conf.d
/router
/190_exim4-config_fsfsmarthost
<<'EOF'
509 # smarthost for fsf mail
510 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
511 # replaced DCsmarthost with mail.fsf.org
513 debug_print = "R: smarthost for $local_part@$domain"
515 domains = ! +local_domains
517 transport = remote_smtp_smarthost
518 route_list = * mail.fsf.org byname
519 host_find_failed = ignore
520 same_domain_copy_routing = yes
525 cat >/etc
/exim
4/update-exim4.conf.conf
<<'EOF'
526 # default stuff, i havent checked if its needed
527 dc_minimaldns='false'
530 dc_use_split_config='true'
531 dc_local_interfaces=''
532 dc_mailname_in_oh='true'
536 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
538 ####### begin dovecot setup ########
539 # based on a little google and package search, just the dovecot
540 # packages we need instead of dovecot-common.
542 # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
543 # directly. The reason to do this is to use dovecot\'s sieve, which
544 # has extensions that allow it to be almost equivalent to exim\'s
545 # filter capabilities, some ways probably better, some worse, and
546 # sieve has the benefit of being supported in postfix and
547 # proprietary/weird environments, so there is more examples on the
548 # internet. I was torn about whether to do this or not, meh.
549 pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd
551 for f
in /p
/c
/subdir_files
/sieve
/*sieve
/a
/c
/subdir_files
/sieve
/*sieve
; do
552 m sudo
-u $u /a
/exe
/lnf
-T $f $uhome/sieve
/${f##*/}
554 # if we changed 90-sieve.conf and removed the active part of the
555 # sieve option, we wouldn\'t need this, but I\'d rather not modify a
556 # default config if not needed. This won\'t work as a symlink in /a/c
558 m sudo
-u $u /a
/exe
/lnf
-T sieve
/main.sieve
$uhome/.dovecot.sieve
560 # we set this later in local.conf
561 sed -ri -f - /etc
/dovecot
/conf.d
/10-mail.conf
<<'EOF'
562 /^\s*mail_location\s*=/d
565 cat >/etc
/dovecot
/conf.d
/20-lmtp.conf
<<EOF
567 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
568 mail_plugins = \$mail_plugins sieve
570 #mail_plugins = \$mail_plugins
572 # For a normal setup with exim, we need something like this, which
573 # removes the domain part
574 # auth_username_format = %Ln
576 # or else # Exim says something like
577 # "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
578 # Dovecot verbose log says something like
579 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
580 # reference: http://wiki.dovecot.org/LMTP/Exim
582 # However, I use this to direct all mail to the same inbox.
583 # A normal way to do this, which I did at first is to have
584 # a router in exim almost at the end, eg 950,
586 # debug_print = "R: catchall for \$local_part@\$domain"
588 # domains = +local_domains
591 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
592 # with superflous options removed.
593 # However, this causes the envelope to be rewritten,
594 # which makes filtering into mailboxes a little less robust or more complicated,
595 # so I've done it this way instead. it also requires
596 # modifying the local router in exim.
597 auth_username_format = $u
603 cat >/etc
/dovecot
/local.conf
<<EOF
604 # so I can use a different login that my shell login for mail. this is
605 # worth doing solely for the reason that if this login is compromised,
606 # it won't also compromise my shell password.
607 !include conf.d/auth-passwdfile.conf.ext
609 # settings derived from wiki and 10-ssl.conf
611 ssl_cert = </etc/exim4/exim.crt
612 ssl_key = </etc/exim4/exim.key
613 # https://github.com/certbot/certbot/raw/master/certbot-apache/certbot_apache/options-ssl-apache.conf
614 # in my cert cronjob, I check if that has changed upstream.
615 ssl_cipher_list = ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
617 # ian: added this, more secure, per google etc
618 ssl_prefer_server_ciphers = yes
621 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
625 # for debugging info, uncomment these.
626 # logs go to syslog and to /var/log/mail.log
630 ####### end dovecot setup ########
634 # mail.iankelling.org so local imap clients can connect with tls and
635 # when they happen to not be local.
636 sed -ri -f - /etc
/hosts
<<'EOF'
637 /^127\.0\.1\.1.* mail\.iankelling\.org\b/{p;d}
638 /^127\.0\.1\.1 /s/ *$/ mail.iankelling.org/
640 /a
/exe
/cedit
mail /etc
/dnsmasq-servers.conf
<<'EOF' || [[ $? == 1 ]]
641 server=/mail.iankelling.org/127.0.1.1
643 if systemctl is-active dnsmasq
>/dev
/null
; then
644 m systemctl reload dnsmasq
647 # I used to use debconf-set-selections + dpkg-reconfigure,
648 # which then updates this file
649 # but the process is slower than updating it directly and then I want to set other things in
650 # update-exim4.conf.conf, so there's no point.
651 # The file is documented in man update-exim4.conf,
652 # except the man page is not perfect, read the bash script to be sure about things.
654 # The debconf questions output is additional documentation that is not
655 # easily accessible, but super long, along with the initial default comment in this
656 # file, so I've saved that into ./mail-notes.conf.
658 cat >>/etc
/exim
4/update-exim4.conf.conf
<<EOF
659 # note: some things we don't set that are here by default because they are unused.
661 dc_eximconfig_configtype='internet'
663 # man page: is used to build the local_domains list, together with “localhost”
664 # iank.bid is for testing
665 # mail.iankelling.org is for machines i own
666 dc_other_hostnames='*.iankelling.org;iankelling.org;*iank.bid;iank.bid;*zroe.org;zroe.org;*.b8.nz;b8.nz'
669 # Is a list of domains for which we accept mail from anywhere on the Internet but which are not delivered locally, e.g.
670 # because this machine serves as secondary MX for these domains. Sets MAIN_RELAY_TO_DOMAINS.
671 # todo: we should not accept from anywhere, only the mx for fsf.
672 dc_relay_domains='*.fsf.org;fsf.org'
676 # the debconf output about mailname is as follows:
677 # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
679 # This name will also be used by other programs. It should be the single, fully
680 # qualified domain name (FQDN).
681 # Thus, if a mail address on the local host is foo@example.org, the correct value for
682 # this option would be example.org.
683 # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
685 echo mail.iankelling.org
> /etc
/mailname
687 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
688 # smarthost config type, not sure. all other settings
689 # would be unused in that config type.
690 cat >>/etc
/exim
4/conf.d
/main
/000_local
<<EOF
691 # enable 587 in addition to the default 25, so that
692 # i can send mail where port 25 is firewalled by isp
693 daemon_smtp_ports = 25 : 587
699 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
701 # The file is based on the outgoing domain-name in the from-header.
702 DKIM_DOMAIN = \${lc:\${domain:\$h_from:}}
704 DKIM_PRIVATE_KEY= \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
707 # failing message on mail-tester.com:
708 # We check if there is a server (A Record) behind your hostname kd.
709 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
710 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
711 # and this one seemed appropriate from grepping config.
712 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
713 # mail to kd, so this should basically be a name that no host has as their
714 # canonical hostname since the actual host sits behind a nat and changes.
715 # Seems logical for this to be the same as mailname.
716 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
718 LOCAL_DELIVERY = dovecot_lmtp
720 # options exim has to avoid having to alter the default config files
721 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
722 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
724 # most of the ones that gmail seems to use.
725 # Exim has horrible default of signing unincluded
726 # list- headers since they got mentioned in an
727 # rfc, but this messes up mailing lists, like gnu/debian which want to
728 # keep your dkim signature intact but add list- headers.
729 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
731 # recommended if dns is expected to work
732 CHECK_RCPT_VERIFY_SENDER = true
733 # seems like a good idea
734 CHECK_DATA_VERIFY_HEADER_SENDER = true
735 CHECK_RCPT_SPF = true
736 CHECK_RCPT_REVERSE_DNS = true
737 CHECK_MAIL_HELO_ISSUED = true
740 #dmarc_tld_file = /etc/public_suffix_list.dat
743 f
=/etc
/cron.daily
/refresh-dmarc-tld-file
747 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
751 sed -i --follow-symlinks -f - /etc
/aliases
<<EOF
752 \$a root: $postmaster
757 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
758 d
=/etc
/systemd
/system
/openvpn@
mail.service.d
760 cat >$d/override.conf
<<'EOF'
763 # time to sleep before restarting a service
767 # StartLimitIntervalSec in recent systemd versions
770 if ! systemctl
cat openvpn@
mail.service|
grep -xF StartLimitInterval
=0 &>/dev
/null
; then
771 # needed for the above config to go into effect
772 m systemctl daemon-reexec
776 m systemctl
enable mailclean.timer
777 m systemctl start mailclean.timer
778 m systemctl restart
$vpn_ser@
mail
779 m systemctl
enable $vpn_ser@
mail
780 m systemctl
enable dovecot
781 m systemctl restart dovecot
784 else # $HOSTNAME != $MAIL_HOST
785 # remove mail. 2 lines to properly remove whitespace
786 sed -ri -f - /etc
/hosts
<<'EOF'
787 s#^(127\.0\.1\.1 .*) +mail\.iankelling\.org$#\1#
788 s#^(127\.0\.1\.1 .*)mail\.iankelling\.org +(.*)#\1\2#
791 echo |
/a
/exe
/cedit
mail /etc
/dnsmasq-servers.conf ||
[[ $?
== 1 ]]
792 if systemctl is-active dnsmasq
>/dev
/null
; then
793 m systemctl reload dnsmasq
796 m systemctl disable mailclean.timer
&>/dev
/null ||
:
797 m systemctl stop mailclean.timer
&>/dev
/null ||
:
798 m systemctl disable
$vpn_ser@
mail
799 m systemctl stop
$vpn_ser@
mail
800 m systemctl disable dovecot ||
:
801 m systemctl stop dovecot ||
:
804 # would only exist because I wrote it i the previous condition,
805 # it\'s not part of exim
806 rm -fv /etc
/exim
4/conf.d
/main
/000_localmacros
807 cat >>/etc
/exim
4/update-exim4.conf.conf
<<EOF
808 dc_eximconfig_configtype='smarthost'
809 dc_smarthost='$smarthost'
810 # The manpage incorrectly states this will do header rewriting, but
811 # that only happens if we have dc_hide_mailname is set.
812 dc_readhost='iankelling.org'
813 # Only used in case of bounces.
814 dc_localdelivery='maildir_home'
817 hostname
-f >/etc
/mailname
819 # This ends up at alerts mailbox on MAIL_HOST, but using a user that doesn't exist elsewhere
821 sed -i --follow-symlinks -f - /etc
/aliases
<<EOF
822 \$a root: root@mail.iankelling.org
826 fi # end $HOSTNAME != $MAIL_HOST
830 # ** bind mount setup
831 # put spool dir in directory that spans multiple distros.
832 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
834 # todo: I\'m suspicious of uids for Debian-exim being the same across
835 # distros. It would be good to test this.
837 sdir
=/var
/spool
/exim4
838 # we only do this if our system has $dir
840 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
841 # about 2 seconds later, exim starts, and immediately puts into paniclog:
842 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
843 # so, im trying a bind mount to get rid of that.
844 if [[ -e /nocow
]]; then
845 if ! grep -Fx "/nocow/exim4 /var/spool/exim4 none bind 0 0" /etc
/fstab
; then
846 echo "/nocow/exim4 /var/spool/exim4 none bind 0 0" >>/etc
/fstab
848 if ! mountpoint
-q $sdir; then
849 m systemctl stop exim4
850 if [[ -L $sdir ]]; then
853 if [[ ! -e $dir && -d $sdir ]]; then
856 if [[ ! -d $sdir ]]; then
858 m
chmod 000 $sdir # only want it to be used when its mounted
866 # ** exim/spool uid setup
867 # i have the spool directory be common to distro multi-boot, so
868 # we need the uid to be the same. 608 cuz it's kind of in the middle
869 # of the free system uids.
870 IFS
=:; read _ _ uid _
< <(getent passwd Debian-exim ||
:) ||
:; unset IFS
871 IFS
=:; read _ _ gid _
< <(getent group Debian-exim ||
:) ||
:; unset IFS
872 if [[ ! $uid ]]; then
873 # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
874 m adduser
--uid 608 --system --group --quiet --home /var
/spool
/exim4 \
875 --no-create-home --disabled-login --force-badname Debian-exim
876 elif [[ $uid != 608 ]]; then
877 m systemctl stop exim4 ||
:
878 m usermod
-u 608 Debian-exim
879 m groupmod
-g 608 Debian-exim
880 m usermod
-g 608 Debian-exim
881 m
find / /nocow
-xdev -uid $uid -exec chown
-h 608 {} +
882 m
find / /nocow
-xdev -gid $gid -exec chgrp
-h 608 {} +
890 if systemctl is-active exim4
>/dev
/null
; then
891 m systemctl reload exim4
893 m systemctl start exim4
897 # * mail monitoring / testing
898 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
899 f
=/usr
/local
/bin
/send-test-forward
902 /usr/sbin/exim -t <<EOF
903 From: ian@iankelling.org
905 Subject: primary_test $(date +%s) $(date +%Y-%m-%dT%H:%M:%S%z)
912 cat >/etc
/cron.d
/mailtest
<<EOF
914 # running as user just because no need to run as root
915 */10 * * * * $u $f 2>&1 | /usr/local/bin/log-once send-test-forward
916 */10 * * * * $u /usr/local/bin/mailtest-check 2>&1 | /usr/local/bin/log-once -1 mailtest-check
917 */10 * * * * root chmod -R g+rw /m/md/bounces 2>&1 | /usr/local/bin/log-once -1 bounces-chmod
919 m
cp /a
/bin
/distro-setup
/filesystem
/usr
/local
/bin
/mailtest-check
/usr
/local
/bin
921 rm -fv /etc
/cron.d
/mailtest
927 # MAIL_HOST also does radicale, and easier to start and stop it here
928 # for when MAIL_HOST changes, so radicale gets the synced files and
929 # does not stop us from remounting /o.
930 if dpkg
-s radicale
&>/dev
/null
; then
931 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
932 m systemctl restart radicale
933 m systemctl
enable radicale
934 if [[ -e /etc
/logrotate.d
/radicale.disabled
]]; then
935 m
mv /etc
/logrotate.d
/radicale
{.disabled
,}
938 m systemctl stop radicale
939 m systemctl disable radicale
940 # weekly logrotate tries to restart radicale even if it's a disabled service in flidas.
941 if [[ -e /etc
/logrotate.d
/radicale
]]; then
942 m
mv /etc
/logrotate.d
/radicale
{,.disabled
}
948 m sudo
-u $u ln -sf -T /m
/.mu
/home
/$u/.mu
951 # /etc/alias setup is debian specific, and exim postinst script sets up
952 # an /etc/alias from root to the postmaster, based on the question
953 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
954 # root, or there was no preexisting aliases file. postfix won\'t set up
955 # a root to $postmaster alias if it\'s already installed. Easiest to
956 # just set it ourselves.
958 # debconf question for postmaster:
959 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
960 # to the user account of the actual system administrator.
961 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
963 # Note that postmaster\'s mail should be read on the system to which it is directed,
964 # rather than being forwarded elsewhere, so (at least one of) the users listed here
965 # should not redirect their mail off this machine. A 'real-' prefix can be used to
966 # force local delivery.
967 # Multiple user names need to be separated by spaces.
968 # Root and postmaster mail recipient: