4 # Copyright (C) 2019 Ian Kelling
6 # Licensed under the Apache License, Version 2.0 (the "License");
7 # you may not use this file except in compliance with the License.
8 # You may obtain a copy of the License at
10 # http://www.apache.org/licenses/LICENSE-2.0
12 # Unless required by applicable law or agreed to in writing, software
13 # distributed under the License is distributed on an "AS IS" BASIS,
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 # See the License for the specific language governing permissions and
16 # limitations under the License.
18 # TODO: copy dkim keys from within this file. its now done in conflink.
19 # TODO: fix dkim key to b chmod 640, group Debian-exim
22 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
24 [[ $EUID == 0 ]] ||
exec sudo
-E "${BASH_SOURCE[0]}" "$@"
25 if [[ ! $SUDO_USER ]]; then
26 echo "$0: error: requires running as nonroot or sudo"
35 Setup exim4 & dovecot & related things
37 The minimal assumption we have is that /etc/mailpass exists
40 -h|--help Print help and exit.
47 ####### instructions for icedove #####
48 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password
49 # we could also just use 127.0.0.1 with no ssl, but todo: disable that in dovecot, so mail is secure from local programs.
51 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
52 # background: ovecot does not yet have ocsp stapling support
53 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
55 # for phone, same thing but username alerts, pass in ivy-pass.
59 ####### begin perstent password instructions ######
61 # # for hosts which have all private files I just use the same user
62 # # for other hosts, each one get\'s their own password.
63 # # for generating secure pass, and storing for server too:
64 # # user=USUALLY_SAME_AS_HOSTNAME
67 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
68 # s sed -i "/^$user:/d" /p/c/filesystem/etc/exim4/passwd
69 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
70 # # todo: port is no longer used in mailpass, remove it.
71 # echo "mail.iankelling.org 587 $user:$(<$f)" >> /p/c/machine_specific/$user/filesystem/etc/mailpass
72 # # then run this script, or part of it which uses /etc/mailpass
74 # # dovecot password, i just need 1 as I\'m the only user
75 # mkdir /p/c/filesystem/etc/dovecot
76 # echo "iank:$(doveadm pw -s ssha256)::::::" >>/p/c/filesystem/etc/dovecot/users
81 # # for ad-hoc testing of some random new host sending mail:
82 # user=li # client host username & hostname
84 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
85 # s sed -i "/^$user:/d" /etc/exim4/passwd
86 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" | s tee -a /etc/exim4/passwd
87 # echo "mail.iankelling.org:$user:$(<$f)" | ssh root@$user dd of=/etc/exim4/passwd.client
88 ####### end perstent password instructions ######
91 ####### begin persistent dkim/dns instructions #########
92 # # Remove 1 level of comments in this section, set the domain var
93 # # for the domain you are setting up, then run this and copy dns settings
95 # domain=iankelling.org
96 # c /p/c/filesystem/etc/exim4
97 # # this has several bugs addressed in comments, but it was helpful
98 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
100 # openssl genrsa -out $domain-private.pem 2048 -outform PEM
101 # openssl rsa -in $domain-private.pem -out $domain.pem -pubout -outform PEM
102 # # selector is needed for having multiple keys for one domain.
103 # # I dun do that, so just use a static one: li
104 # echo "txt record name: li._domainkey.$domain"
105 # # Debadmin page does not have v=, fastmail does, and this
106 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
107 # # https://www.ietf.org/rfc/rfc6376.txt
108 # # Join and print all but first and last line.
109 # # last line: swap hold & pattern, remove newlines, print.
110 # # lines 2+: append to hold space
111 # echo "txt record contents:"
112 # echo "v=DKIM1; k=rsa; p=$(sed -n '${x;s/\n//gp};2,$H' $domain.pem)"
113 # chmod 644 $domain.pem
114 # chmod 640 $domain-private.pem
115 # # in conflink, we chown these to group debian
117 # # selector was also put into /etc/exim4/conf.d/main/000_localmacros,
118 # # via the mail-setup scripts
120 # # 2017-02 dmarc policies:
121 # # host -t txt _dmarc.gmail.com
122 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
123 # # there were articles claiming gmail would be changing
124 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
125 # # expected to cause problems
126 # # with a few old mailing lists, copying theirs for now.
128 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
130 # # 2017-02 spf policies:
131 # # host -t txt lists.fedoraproject.org
132 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
133 # # i include fastmail\'s settings, per their instructions,
134 # # and follow their policy. In mail in a box, or similar instructions,
135 # # I\'ve seen recommended to not use a restrictive policy.
136 # echo "spf dns: name is empty, value: v=spf1 a include:spf.messagingengine.com ?all"
138 # # to check if dns has updated, you do
139 # host -a mesmtp._domainkey.$domain
142 # # setting it to iankelling.org would work the same, but this
143 # # is more flexible, I could change where mail.iankelling.org pointed.
145 # mx records, 2 records each, for * and empty domain
146 # pri 10 mail.iankelling.org
147 # pri 20 in1-smtp.messagingengine.com
148 # pri 30 in2-smtp.messagingengine.com
150 ####### end persistent dkim instructions #########
154 e
() { printf "%s\n" "$*"; }
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
$f ) )) > 60*60*12 )); then
165 apt-get
-y install --purge --auto-remove "$@"
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" # exim
180 # trisquel 8 = openvpn, debian stretch = openvpn-client
181 vpn_ser
=openvpn-client
182 if [[ ! -e /lib
/systemd
/system
/openvpn-client@.service
]]; then
186 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
187 # afaik, these will get ignored because they are routing to my own
188 # machine, but rm them is safer
189 rm -f $
(eval echo ~
$u)/.forward
/root
/.forward
191 # this can\'t be a symlink and has permission restrictions
192 # it might work in /etc/aliases, but this seems more proper.
193 install -m 644 {-o,-g}$u <(e
$forward) $
(eval echo ~
$u)/.forward
199 if [[ -e /p
/c
/filesystem
]]; then
200 # allow failure of these commands when our internet is down, they are likely not needed,
201 # we check that a valid cert is there already.
202 # to put the hostname in the known hosts
203 if ! ssh -o StrictHostKeyChecking
=no root@li.iankelling.org
:; then
204 # This just causes failure if our cert is going to expire in the next 30 days.
205 # Certs I generate last 10 years.
206 openssl x509
-checkend $
(( 60 * 60 * 24 * 30 )) -noout -in /etc
/openvpn
/mail.crt
208 # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
209 # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
210 # after my internet was down for a bit:
211 # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
212 /a
/exe
/vpn-mk-client-cert
-b mail -n mail -s /b
/ds
/mail-route li.iankelling.org
217 cat >/etc
/systemd
/system
/mailclean.timer
<<'EOF'
219 Description=Run mailclean daily
225 WantedBy=timers.target
228 cat >/etc
/systemd
/system
/mailclean.service
<<EOF
230 Description=Delete and archive old mail files
231 After=multi-user.target
236 ExecStart=/a/bin/log-quiet/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
239 systemctl daemon-reload
242 source /a
/bin
/bash_unpublished
/source-state
243 mkdir
-p /etc
/exim
4/conf.d
/{main
,transport
,auth
,router
}
245 cat >/etc
/exim
4/rcpt_local_acl
<<'EOF'
246 # Only hosts we control send to @mail.iankelling.org, so make sure
247 # they are all authed.
248 # Note, if we wanted authed senders for all domains,
249 # we could make this condition in acl_check_mail
251 message = ian trusted domain recepient but no auth
253 domains = mail.iankelling.org
255 cat >/etc
/exim
4/data_local_acl
<<'EOF'
256 # Except for the "condition =", this was
257 # a comment in the check_data acl. The comment about this not
258 # being suitable is mostly bs. The only thing related I found was to
259 # add the condition =, cuz spamassassin has problems with big
260 # messages and spammers don't bother with big messages,
261 # but I've increased the size from 10k
262 # suggested in official docs, and 100k in the wiki example because
263 # those docs are rather old and I see a 110k spam message
264 # pretty quickly looking through my spam folder.
266 condition = ${if < {$message_size}{2000K}}
267 spam = Debian-exim:true
268 add_header = X-Spam_score: $spam_score\n\
269 X-Spam_score_int: $spam_score_int\n\
270 X-Spam_bar: $spam_bar\n\
271 X-Spam_report: $spam_report
274 # spf = pass:fail:softfail:none:neutral:permerror:temperror
275 # dmarc_status = reject:quarantine
276 # add_header = Reply-to: dmarctest@iankelling.org
279 cat >/etc
/exim
4/conf.d
/auth
/29_exim4-config_auth
<<'EOF'
280 # from 30_exim4-config_examples
285 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
286 server_set_id = $auth2
288 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
289 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
293 cat >/etc
/exim
4/conf.d
/router
/900_exim4-config_local_user
<<'EOF'
294 ### router/900_exim4-config_local_user
295 #################################
297 # This router matches local user mailboxes. If the router fails, the error
298 # message is "Unknown user".
301 debug_print = "R: local_user for $local_part@$domain"
303 domains = +local_domains
304 # ian: commented this, in conjunction with a dovecot lmtp
305 # change so I get mail for all users.
308 transport = LOCAL_DELIVERY
309 cannot_route_message = Unknown user
311 cat >/etc
/exim
4/conf.d
/transport
/30_exim4-config_dovecot_lmtp
<<'EOF'
314 socket = /var/run/dovecot/lmtp
315 #maximum number of deliveries per batch, default 1
319 cat >/etc
/exim
4/host_local_deny_exceptions
<<'EOF'
324 cat >/etc
/exim
4/conf.d
/router
/190_exim4-config_fsfsmarthost
<<'EOF'
325 # smarthost for fsf mail
326 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
327 # replaced DCsmarthost with mail.fsf.org
329 debug_print = "R: smarthost for $local_part@$domain"
331 domains = ! +local_domains
333 transport = remote_smtp_smarthost
334 route_list = * mail.fsf.org byname
335 host_find_failed = ignore
336 same_domain_copy_routing = yes
341 #### begin mail cert setup ###
342 f
=/usr
/local
/bin
/mail-cert-cron
346 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
348 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
350 f=/a/bin/bash_unpublished/source-state
354 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
355 local_mx=mail.iankelling.org
356 rsync_common="rsync -ogtL --chown=root:Debian-exim --chmod=640 root@li.iankelling.org:/etc/letsencrypt/live/$local_mx/"
357 ${rsync_common}fullchain.pem /etc/exim4/exim.crt
359 ${rsync_common}privkey.pem /etc/exim4/exim.key
361 if [[ $ret != $new_ret ]]; then
362 echo "$0: error: differing rsync returns, $ret, $new_ret"
366 if [[ $new_ret != 0 ]]; then
367 if ! openssl x509 -checkend $(( 60 * 60 * 24 * 3 )) -noout -in /etc/exim4/exim.crt; then
368 echo "$0: error!: cert rsync failed and it will expire in less than 3 days"
376 cat >/etc
/systemd
/system
/mailcert.service
<<'EOF'
378 Description=Mail cert rsync
379 After=multi-user.target
383 ExecStart=/a/bin/log-quiet/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
386 cat >/etc
/systemd
/system
/mailcert.timer
<<'EOF'
388 Description=Run mail-cert once a day
394 WantedBy=timers.target
396 systemctl daemon-reload
397 systemctl start mailcert
398 systemctl restart mailcert.timer
399 systemctl
enable mailcert.timer
401 ##### end mailcert setup #####
404 cat >/etc
/exim
4/update-exim4.conf.conf
<<'EOF'
405 # default stuff, i havent checked if its needed
406 dc_minimaldns='false'
409 dc_use_split_config='true'
410 dc_local_interfaces=''
411 dc_mailname_in_oh='true'
415 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
417 # mail.iankelling.org so local imap clients can connect with tls and
418 # when they happen to not be local.
419 sed -ri -f - /etc
/hosts
<<'EOF'
420 /^127\.0\.1\.1.* mail\.iankelling\.org\b/{p;d}
421 /^127\.0\.1\.1 /s/ *$/ mail.iankelling.org/
423 /a
/exe
/cedit
mail /etc
/dnsmasq-servers.conf
<<'EOF' || [[ $? == 1 ]]
424 server=/mail.iankelling.org/127.0.1.1
426 systemctl reload dnsmasq
428 # I used to use debconf-set-selections + dpkg-reconfigure,
429 # which then updates this file
430 # but the process is slower than updating it directly and then I want to set other things in
431 # update-exim4.conf.conf, so there's no point.
432 # The file is documented in man update-exim4.conf,
433 # except the man page is not perfect, read the bash script to be sure about things.
435 # The debconf questions output is additional documentation that is not
436 # easily accessible, but super long, along with the initial default comment in this
437 # file, so I've saved that into ./mail-notes.conf.
439 cat >>/etc
/exim
4/update-exim4.conf.conf
<<EOF
440 # note: some things we don't set that are here by default because they are unused.
442 dc_eximconfig_configtype='internet'
444 # man page: is used to build the local_domains list, together with “localhost”
445 # iank.bid is for testing
446 # mail.iankelling.org is for machines i own
447 dc_other_hostnames='*.iankelling.org;iankelling.org;*iank.bid;iank.bid;*zroe.org;zroe.org;*.b8.nz;b8.nz'
450 # Is a list of domains for which we accept mail from anywhere on the Internet but which are not delivered locally, e.g.
451 # because this machine serves as secondary MX for these domains. Sets MAIN_RELAY_TO_DOMAINS.
452 # todo: we should not accept from anywhere, only the mx for fsf.
453 dc_relay_domains='*.fsf.org;fsf.org'
457 # the debconf output about mailname is as follows:
458 # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
460 # This name will also be used by other programs. It should be the single, fully
461 # qualified domain name (FQDN).
462 # Thus, if a mail address on the local host is foo@example.org, the correct value for
463 # this option would be example.org.
464 # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
466 echo mail.iankelling.org
> /etc
/mailname
468 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
469 # smarthost config type, not sure. all other settings
470 # would be unused in that config type.
471 rm -f /etc
/exim
4/conf.d
/main
/000_localmacros
# old filename
472 cat >/etc
/exim
4/conf.d
/main
/000_local
<<EOF
473 # enable 587 in addition to the default 25, so that
474 # i can send mail where port 25 is firewalled by isp
475 daemon_smtp_ports = 25 : 587
476 # i don't have ipv6 setup for my vpn tunnel yet.
479 MAIN_TLS_ENABLE = true
485 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
487 # The file is based on the outgoing domain-name in the from-header.
488 DKIM_DOMAIN = \${lc:\${domain:\$h_from:}}
490 DKIM_PRIVATE_KEY= \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
493 # failing message on mail-tester.com:
494 # We check if there is a server (A Record) behind your hostname kd.
495 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
496 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
497 # and this one seemed appropriate from grepping config.
498 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
499 # mail to kd, so this should basically be a name that no host has as their
500 # canonical hostname since the actual host sits behind a nat and changes.
501 # Seems logical for this to be the same as mailname.
502 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
504 # normally empty, I set this so I can set the envelope address
505 # when doing mail redelivery to invoke filters
506 MAIN_TRUSTED_GROUPS = $u
508 LOCAL_DELIVERY = dovecot_lmtp
510 # options exim has to avoid having to alter the default config files
511 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/rcpt_local_acl
512 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/data_local_acl
514 # debian exim config added this in 2016 or so?
515 # it's part of the smtp spec, to limit lines to 998 chars
516 # but a fair amount of legit mail does not adhere to it. I don't think
517 # this should be default, like it says in
518 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
519 # todo: the bug for introducing this was about headers, but
520 # the fix maybe is for all lines? one says gmail rejects, the
521 # other says gmail does not reject. figure out and open a new bug.
522 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
524 # most of the ones that gmail seems to use.
525 # Exim has horrible default of signing unincluded
526 # list- headers since they got mentioned in an
527 # rfc, but this messes up mailing lists, like gnu/debian which want to
528 # keep your dkim signature intact but add list- headers.
529 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
531 # recommended if dns is expected to work
532 CHECK_RCPT_VERIFY_SENDER = true
533 # seems like a good idea
534 CHECK_DATA_VERIFY_HEADER_SENDER = true
535 CHECK_RCPT_SPF = true
536 CHECK_RCPT_REVERSE_DNS = true
537 CHECK_MAIL_HELO_ISSUED = true
539 MAIN_LOG_SELECTOR = +all
542 #dmarc_tld_file = /etc/public_suffix_list.dat
545 f
=/etc
/cron.daily
/refresh-dmarc-tld-file
549 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
553 sed -i --follow-symlinks -f - /etc
/aliases
<<EOF
554 \$a root: $postmaster
558 ####### begin dovecot setup ########
559 # based on a little google and package search, just the dovecot
560 # packages we need instead of dovecot-common.
562 # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
563 # directly. The reason to do this is to use dovecot\'s sieve, which
564 # has extensions that allow it to be almost equivalent to exim\'s
565 # filter capabilities, some ways probably better, some worse, and
566 # sieve has the benefit of being supported in postfix and
567 # proprietary/weird environments, so there is more examples on the
568 # internet. I was torn about whether to do this or not, meh.
569 pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd
571 for f
in /p
/c
/subdir_files
/sieve
/*sieve
/a
/c
/subdir_files
/sieve
/*sieve
; do
572 sudo
-u $u /a
/exe
/lnf
-T $f $
(eval echo ~
$u)/sieve
/${f##*/}
574 # if we changed 90-sieve.conf and removed the active part of the
575 # sieve option, we wouldn\'t need this, but I\'d rather not modify a
576 # default config if not needed. This won\'t work as a symlink in /a/c
578 sudo
-u $u /a
/exe
/lnf
-T sieve
/main.sieve $
(eval echo ~
$u)/.dovecot.sieve
580 # we set this later in local.conf
581 sed -ri -f - /etc
/dovecot
/conf.d
/10-mail.conf
<<'EOF'
582 /^\s*mail_location\s*=/d
585 cat >/etc
/dovecot
/conf.d
/20-lmtp.conf
<<EOF
587 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
588 mail_plugins = \$mail_plugins sieve
590 #mail_plugins = \$mail_plugins
592 # For a normal setup with exim, we need something like this, which
593 # removes the domain part
594 # auth_username_format = %Ln
596 # or else # Exim says something like
597 # "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
598 # Dovecot verbose log says something like
599 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
600 # reference: http://wiki.dovecot.org/LMTP/Exim
602 # However, I use this to direct all mail to the same inbox.
603 # A normal way to do this, which I did at first is to have
604 # a router in exim almost at the end, eg 950,
606 # debug_print = "R: catchall for \$local_part@\$domain"
608 # domains = +local_domains
611 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
612 # with superflous options removed.
613 # However, this causes the envelope to be rewritten,
614 # which makes filtering into mailboxes a little less robust or more complicated,
615 # so I've done it this way instead. it also requires
616 # modifying the local router in exim.
617 auth_username_format = $u
623 cat >/etc
/dovecot
/local.conf
<<EOF
624 # so I can use a different login that my shell login for mail. this is
625 # worth doing solely for the reason that if this login is compromised,
626 # it won't also compromise my shell password.
627 !include conf.d/auth-passwdfile.conf.ext
629 # settings derived from wiki and 10-ssl.conf
631 ssl_cert = </etc/exim4/exim.crt
632 ssl_key = </etc/exim4/exim.key
633 # https://github.com/certbot/certbot/raw/master/certbot-apache/certbot_apache/options-ssl-apache.conf
634 # in my cert cronjob, I check if that has changed upstream.
635 ssl_cipher_list = ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
637 # ian: added this, more secure, per google etc
638 ssl_prefer_server_ciphers = yes
641 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
645 # for debugging info, uncomment these.
646 # logs go to syslog and to /var/log/mail.log
650 ####### end dovecot setup ########
652 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
653 d
=/etc
/systemd
/system
/openvpn@
mail
655 cat >$d/override.conf
<<'EOF'
658 # time to sleep before restarting a service
662 # StartLimitIntervalSec in recent systemd versions
668 systemctl
enable mailclean.timer
669 systemctl start mailclean.timer
670 systemctl restart
$vpn_ser@
mail
671 systemctl
enable $vpn_ser@
mail
672 systemctl
enable dovecot
673 systemctl restart dovecot
675 else # $HOSTNAME != $MAIL_HOST
676 # remove mail. 2 lines to properly remove whitespace
677 sed -ri -f - /etc
/hosts
<<'EOF'
678 s#^(127\.0\.1\.1 .*) +mail\.iankelling\.org$#\1#
679 s#^(127\.0\.1\.1 .*)mail\.iankelling\.org +(.*)#\1\2#
682 echo |
/a
/exe
/cedit
mail /etc
/dnsmasq-servers.conf ||
[[ $?
== 1 ]]
683 systemctl reload dnsmasq
685 systemctl disable mailclean.timer
&>/dev
/null ||
:
686 systemctl stop mailclean.timer
&>/dev
/null ||
:
687 systemctl disable
$vpn_ser@
mail
688 systemctl stop
$vpn_ser@
mail
689 systemctl disable dovecot ||
:
690 systemctl stop dovecot ||
:
693 # would only exist because I wrote it i the previous condition,
694 # it\'s not part of exim
695 rm -f /etc
/exim
4/conf.d
/main
/000_localmacros
696 cat >>/etc
/exim
4/update-exim4.conf.conf
<<EOF
697 dc_eximconfig_configtype='satellite'
698 dc_smarthost='$smarthost'
699 # The manpage incorrectly states this will do header rewriting, but
700 # that only happens if we have dc_hide_mailname is set.
701 dc_readhost='iankelling.org'
702 # Only used in case of bounces.
703 dc_localdelivery='maildir_home'
706 hostname
-f > /etc
/mailname
708 # We set this to alerts on MAIL_HOST, but using a user that doesn't exist elsewhere
710 sed -i --follow-symlinks -f - /etc
/aliases
<<EOF
715 fi # end $HOSTNAME != $MAIL_HOST
717 systemctl reload exim4
719 # i have the spool directory be common to distro multi-boot, so
720 # we need the uid to be the same. 608 cuz it's kind of in the middle
721 # of the free system uids.
722 IFS
=:; read _ _ uid _
< <(getent passwd Debian-exim ||
:) ||
:; unset IFS
723 IFS
=:; read _ _ gid _
< <(getent group Debian-exim ||
:) ||
:; unset IFS
724 if [[ ! $uid ]]; then
725 # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
726 adduser
--uid 608 --system --group --quiet --home /var
/spool
/exim4 \
727 --no-create-home --disabled-login --force-badname Debian-exim
728 elif [[ $uid != 608 ]]; then
729 systemctl stop exim4 ||
:
730 usermod
-u 608 Debian-exim
731 groupmod
-g 608 Debian-exim
732 usermod
-g 608 Debian-exim
733 find / /nocow
-xdev -uid $uid -exec chown
-h 608 {} +
734 find / /nocow
-xdev -gid $gid -exec chgrp
-h 608 {} +
738 # light version of exim does not have sasl auth support.
739 pi exim4-daemon-heavy spamassassin spf-tools-perl
743 ##### begin spamassassin config
744 systemctl
enable spamassassin
746 sed -i '/^\s*CRON\s*=/d' /etc
/default
/spamassassin
747 e CRON
=1 >>/etc
/default
/spamassassin
748 # just noticed this in the config file, seems like a good idea.
749 sed -i '/^\s*NICE\s*=/d' /etc
/default
/spamassassin
750 e
'NICE="--nicelevel 15"' >>/etc
/default
/spamassassin
751 systemctl start spamassassin
752 systemctl reload spamassassin
754 cat >/etc
/systemd
/system
/spamddnsfix.service
<<'EOF'
756 Description=spamd dns bug fix cronjob
760 ExecStart=/a/bin/distro-setup/spamd-dns-fix
762 # 2017-09, debian closed the bug on this saying upstream had fixed it.
763 # remove this when i\'m using the newer package, ie, debian 10, or maybe
765 cat >/etc
/systemd
/system
/spamddnsfix.timer
<<'EOF'
767 Description=run spamd bug fix script every 10 minutes
771 # the script looks back 9 minutes into the journal,
772 # it takes a second to run,
773 # so lets run every 9 minutes and 10 seconds.
777 WantedBy=timers.target
779 systemctl daemon-reload
780 systemctl restart spamddnsfix.timer
781 systemctl
enable spamddnsfix.timer
783 ##### end spamassassin config
789 # https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
790 # i only need .forwards, so just doing that one.
791 cd /etc
/exim
4/conf.d
/router
792 b
=userforward_higher_priority
793 # replace the router name so it is unique
794 sed -r s
/^
\\S
+:/$b:/ 600_exim4-config_userforward
>175_
$b
796 # begin setup passwd.client
797 f
=/etc
/exim
4/passwd.client
798 rm -f /etc
/exim
4/passwd.client
799 install -m 640 -g Debian-exim
/dev
/null
$f
800 while read -r domain _ pass
; do
801 # reference: exim4_passwd_client(5)
802 printf "%s:%s\n" "$domain" "$pass" >>$f
804 # end setup passwd.client
806 # by default, only 10 days of logs are kept. increase that.
807 sed -ri 's/^(\s*rotate\s).*/\11000/' /etc
/logrotate.d
/exim4-base
809 systemctl restart exim4
813 # /etc/alias setup is debian specific, and exim postinst script sets up
814 # an /etc/alias from root to the postmaster, based on the question
815 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
816 # root, or there was no preexisting aliases file. postfix won\'t set up
817 # a root to $postmaster alias if it\'s already installed. Easiest to
818 # just set it ourselves.
820 # debconf question for postmaster:
821 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
822 # to the user account of the actual system administrator.
823 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
825 # Note that postmaster\'s mail should be read on the system to which it is directed,
826 # rather than being forwarded elsewhere, so (at least one of) the users listed here
827 # should not redirect their mail off this machine. A 'real-' prefix can be used to
828 # force local delivery.
829 # Multiple user names need to be separated by spaces.
830 # Root and postmaster mail recipient:
832 # local mail that bounces goes to /Maildir or /root/Maildir
833 dirs=(/m
/md
/bounces
/{cur
,tmp
,new
})
835 chown
-R $u:Debian-exim
/m
/md
/bounces
837 usermod
-a -G Debian-exim
$u
838 for d
in /Maildir
/root
/Maildir
; do
839 if [[ ! -L $d ]]; then
842 ln -sf -T /m
/md
/bounces
$d
845 sudo
-u $u ln -sf -T /m
/.mu
/home
/$u/.mu
847 # put spool dir in directory that spans multiple distros.
848 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
850 # todo: I\'m suspicious of uids for Debian-exim being the same across
851 # distros. It would be good to test this.
853 sdir
=/var
/spool
/exim4
854 # we only do this if our system has $dir
856 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
857 # about 2 seconds later, exim starts, and immediately puts into paniclog:
858 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
859 # so, im trying a bind mount to get rid of that.
860 if [[ -e /nocow
]]; then
861 if ! grep -Fx "/nocow/exim4 /var/spool/exim4 none bind 0 0" /etc
/fstab
; then
862 echo "/nocow/exim4 /var/spool/exim4 none bind 0 0" >> /etc
/fstab
864 if ! mountpoint
-q $sdir; then
866 if [[ -L $sdir ]]; then
869 if [[ ! -e $dir && -d $sdir ]]; then
872 if [[ ! -d $sdir ]]; then
874 chmod 000 $sdir # only want it to be used when its mounted
882 systemctl restart exim4
883 systemctl
enable exim4
886 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
887 f
=/usr
/local
/bin
/send-test-forward
890 echo body_test | mail -s "primary_test $(date +%s) $(date +%Y-%m-%dT%H:%M:%S%z)" iank@posteo.de
894 cat >/etc
/cron.d
/mailtest
<<EOF
896 # running as user just because no need to run as root
897 */10 * * * * $u $f 2>&1 | /usr/local/bin/log-once send-test-forward
898 */10 * * * * $u /usr/local/bin/mailtest-check 2>&1 | /usr/local/bin/log-once -1 send-test-forward
899 */10 * * * * root chmod -R g+rw /m/md/bounces 2>&1 | /usr/local/bin/log-once -1 bounces-chmod
901 cp /a
/bin
/distro-setup
/filesystem
/usr
/local
/bin
/mailtest-check
/usr
/local
/bin
903 rm -f /etc
/cron.d
/mailtest
906 # MAIL_HOST also does radicale, and easier to start and stop it here
907 # for when MAIL_HOST changes, so radicale gets the synced files and
908 # does not stop us from remounting /o.
909 if dpkg
-s radicale
&>/dev
/null
; then
910 if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
911 systemctl restart radicale
912 systemctl
enable radicale
913 if [[ -e /etc
/logrotate.d
/radicale.disabled
]]; then
914 mv /etc
/logrotate.d
/radicale
{.disabled
,}
917 systemctl stop radicale
918 systemctl disable radicale
919 # weekly logrotate tries to restart radicale even if it's a disabled service in flidas.
920 if [[ -e /etc
/logrotate.d
/radicale
]]; then
921 mv /etc
/logrotate.d
/radicale
{,.disabled
}