4 # Copyright (C) 2016 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: make quick backups of maildir, or deliver to multiple hosts.
21 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
23 [[ $EUID == 0 ]] ||
exec sudo
-E "$BASH_SOURCE" "$@"
24 if [[ ! $SUDO_USER ]]; then
25 echo "$0: error: requires running as nonroot or sudo"
34 Setup exim4 & dovecot & related things
36 The minimal assumption we have is that /etc/mailpass exists
39 -h|--help Print help and exit.
46 ####### instructions for icedove #####
47 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password
48 # we could also just use 127.0.0.1 with no ssl, but todo: disable that in dovecot, so mail is secure from local programs.
50 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
51 # background: ovecot does not yet have ocsp stapling support
52 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
54 # for phone, same thing but username alerts, pass in ivy-pass.
58 ####### begin perstent password instructions ######
60 # # for hosts which have all private files I just use the same user
61 # # for other hosts, each one get\'s their own password.
62 # # for generating secure pass, and storing for server too:
63 # # user=USUALLY_SAME_AS_HOSTNAME
66 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
67 # s sed -i "/^$user:/d" /p/c/filesystem/etc/exim4/passwd
68 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
69 # echo "mail.iankelling.org 587 $user:$(<$f)" >> /p/c/machine_specific/$user/filesystem/etc/mailpass
70 # # then run this script, or part of it which uses /etc/mailpass
72 # # dovecot password, i just need 1 as I\'m the only user
73 # mkdir /p/c/filesystem/etc/dovecot
74 # echo "iank:$(doveadm pw -s ssha256)::::::" >>/p/c/filesystem/etc/dovecot/users
79 # # for ad-hoc testing of some random new host sending mail:
80 # user=li # client host username & hostname
82 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
83 # s sed -i "/^$user:/d" /etc/exim4/passwd
84 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" | s tee -a /etc/exim4/passwd
85 # echo "mail.iankelling.org:$user:$(<$f)" | ssh root@$user dd of=/etc/exim4/passwd.client
86 ####### end perstent password instructions ######
89 ####### begin persistent dkim/dns instructions #########
90 # # Remove 1 level of comments in this section, set the domain var
91 # # for the domain you are setting up, then run this and copy dns settings
93 # domain=iankelling.org
94 # c /p/c/filesystem/etc/exim4
95 # # this has several bugs addressed in comments, but it was helpful
96 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
98 # openssl genrsa -out $domain-private.pem 2048 -outform PEM
99 # openssl rsa -in $domain-private.pem -out $domain.pem -pubout -outform PEM
100 # # selector is needed for having multiple keys for one domain.
101 # # I dun do that, so just use a static one: li
102 # echo "txt record name: li._domainkey.$domain"
103 # # Debadmin page does not have v=, fastmail does, and this
104 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
105 # # https://www.ietf.org/rfc/rfc6376.txt
106 # # Join and print all but first and last line.
107 # # last line: swap hold & pattern, remove newlines, print.
108 # # lines 2+: append to hold space
109 # echo "txt record contents:"
110 # echo "v=DKIM1; k=rsa; p=$(sed -n '${x;s/\n//gp};2,$H' $domain.pem)"
111 # chmod 644 $domain.pem
112 # chmod 640 $domain-private.pem
113 # # in conflink, we chown these to group debian
115 # # selector was also put into /etc/exim4/conf.d/main/000_localmacros,
116 # # via the mail-setup scripts
118 # # 2017-02 dmarc policies:
119 # # host -t txt _dmarc.gmail.com
120 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
121 # # there were articles claiming gmail would be changing
122 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
123 # # expected to cause problems
124 # # with a few old mailing lists, copying theirs for now.
126 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
128 # # 2017-02 spf policies:
129 # # host -t txt lists.fedoraproject.org
130 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
131 # # i include fastmail\'s settings, per their instructions,
132 # # and follow their policy. In mail in a box, or similar instructions,
133 # # I\'ve seen recommended to not use a restrictive policy.
134 # echo "spf dns: name is empty, value: v=spf1 a include:spf.messagingengine.com ?all"
136 # # to check if dns has updated, you do
137 # host -a mesmtp._domainkey.$domain
140 # # setting it to iankelling.org would work the same, but this
141 # # is more flexible, I could change where mail.iankelling.org pointed.
143 # mx records, 2 records each, for * and empty domain
144 # pri 10 mail.iankelling.org
145 # pri 20 in1-smtp.messagingengine.com
146 # pri 30 in2-smtp.messagingengine.com
148 ####### end persistent dkim instructions #########
153 # /usr/share/doc/exim4-base/README.Debian.gz
154 # /usr/share/doc/exim4-base/spec.txt.gz
156 # routers, transports, and authenticators are sections, and you define
157 # driver instances in those sections, and the manual calls them driver
158 # types but there is also a more specific "type" of driver, which is specified
159 # with the driver = some_module setting in the driver.
161 # the driver option must precede and private options (options that are
162 # specific to that driver), so follow example of putting it at beginning.
164 # The full list of option settings for any particular driver instance,
165 # including all the defaulted values, can be extracted by making use of
166 # the -bP command line option.
167 # exim -bP config_file to see what config file it used
168 # exim -bP config to see
170 # exim clear out message queue. as root:
171 # adapted from somewhere on stackoverflow.
172 # ser stop exim4; sleep 1; exim -bp | exiqgrep -i | xargs exim -Mrm; ser start exim4
174 # fastmail has changed their smtp server, but the old one still works,
175 # I see no reason to bother changing.
176 # New one is smtp.fastmail.com
178 # test delivery & rewrite settings:
179 #exim4 -bt iank@localhost
186 postconf
-ev "${MAPFILE[@]}"
188 e
() { printf "%s\n" "$*"; }
189 pi
() { # package install
191 if dpkg
-s -- "$@" &> /dev
/null
; then
194 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
195 f
=/var
/cache
/apt
/pkgcache.bin
;
196 if [[ ! -r $f ]] ||
(( $
(( $
(date +%s
) - $
(stat
-c %Y
$f ) )) > 60*60*12 )); then
199 apt-get
-y install --purge --auto-remove "$@"
203 mxhost
=mail.iankelling.org
207 # old setup. left as comment for example
208 # mxhost=mail.messagingengine.com
210 # forward=ian@iankelling.org
212 smarthost
="$mxhost::$mxport" # exim
214 # trisquel 8 = openvpn, debian stretch = openvpn-client
215 vpn_ser
=openvpn-client
216 if [[ ! -e /lib
/systemd
/system
/openvpn-client@.service
]]; then
220 if [[ $HOSTNAME == $MAIL_HOST ]]; then
221 # afaik, these will get ignored because they are routing to my own
222 # machine, but rm them is safer
223 rm -f $
(eval echo ~
$u)/.forward
/root
/.forward
225 # this can\'t be a symlink and has permission restrictions
226 # it might work in /etc/aliases, but this seems more proper.
227 install -m 644 {-o,-g}$u <(e
$forward) $
(eval echo ~
$u)/.forward
233 if [[ -e /p
/c
/filesystem
]]; then
234 # allow failure of these commands when our internet is down, they are likely not needed,
235 # we check that a valid cert is there already.
236 # to put the hostname in the known hosts
237 if ! ssh -o StrictHostKeyChecking
=no root@li.iankelling.org
:; then
238 # This just causes failure if our cert is going to expire in the next 30 days.
239 # Certs I generate last 10 years.
240 openssl x509
-checkend $
(( 60 * 60 * 24 * 30 )) -noout -in /etc
/openvpn
/mail.crt
242 # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
243 # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
244 # after my internet was down for a bit:
245 # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
246 /a
/exe
/vpn-mk-client-cert
-b mail -n mail -s /b
/ds
/mail-route li.iankelling.org
250 cat >/etc
/systemd
/system
/offlineimapsync.timer
<<'EOF'
252 Description=Run offlineimap-sync once every min
258 WantedBy=timers.target
261 cat >/etc
/systemd
/system
/offlineimapsync.service
<<EOF
263 Description=Offlineimap sync
264 After=multi-user.target
269 ExecStart=/a/bin/log-quiet/sysd-mail-once offlineimap-sync /a/bin/distro-setup/offlineimap-sync
272 cat >/etc
/systemd
/system
/mailclean.timer
<<'EOF'
274 Description=Run mailclean daily
280 WantedBy=timers.target
283 cat >/etc
/systemd
/system
/mailclean.service
<<EOF
285 Description=Delete and archive old mail files
286 After=multi-user.target
291 ExecStart=/a/bin/log-quiet/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
294 systemctl daemon-reload
296 # wording of question from dpkg-reconfigure exim4-config
297 # 1. internet site; mail is sent and received directly using SMTP
298 # 2. mail sent by smarthost; received via SMTP or fetchmail
299 # 3. mail sent by smarthost; no local mail
300 # 4. local delivery only; not on a network
301 # 5. no configuration at this time
303 # Note, I have used option 2 in the past for receiving mail
304 # from lan hosts, sending external mail via another smtp server.
306 # Note, other than configtype, we could set all the options in
307 # both types of configs without harm, they would either be
308 # ignored or be disabled by other settings, but the default
309 # local_interfaces definitely makes things more secure.
311 # most of these settings get translated into settings
312 # in /etc/exim4/update-exim4.conf.conf
313 # how /etc/exim4/update-exim4.conf.conf translates into actual exim settings is
314 # documented in man update-exim4.conf, which outputs to the config that
315 # exim actually reads. except the man page is not perfect, for example,
316 # it doesn't document that it sets
317 # DCconfig_${dc_eximconfig_configtype}" "1"
318 # which is a line from update-exim4.conf, which is a relatively short bash script.
319 # mailname setting sets /etc/mailname
321 debconf-set-selections
<<EOF
322 exim4-config exim4/use_split_config boolean true
325 source /a
/bin
/bash_unpublished
/source-state
326 mkdir
-p /etc
/exim
4/conf.d
/{main
,transport
,auth
,router
}
328 cat >/etc
/exim
4/rcpt_local_acl
<<'EOF'
329 # Only hosts we control send to mail.iankelling.org, so make sure
330 # they are all authed.
331 # Note, if we wanted authed senders for all domains,
332 # we could make this condition in acl_check_mail
334 message = ian trusted domain recepient but no auth
336 domains = mail.iankelling.org
338 cat >/etc
/exim
4/data_local_acl
<<'EOF'
339 # Except for the "condition =", this was
340 # a comment in the check_data acl. The comment about this not
341 # being suitable is mostly bs. The only thing related I found was to
342 # add the condition =, cuz spamassassin has problems with big
343 # messages and spammers don't bother with big messages,
344 # but I've increased the size from 10k
345 # suggested in official docs, and 100k in the wiki example because
346 # those docs are rather old and I see a 110k spam message
347 # pretty quickly looking through my spam folder.
349 condition = ${if < {$message_size}{2000K}}
350 spam = Debian-exim:true
351 add_header = X-Spam_score: $spam_score\n\
352 X-Spam_score_int: $spam_score_int\n\
353 X-Spam_bar: $spam_bar\n\
354 X-Spam_report: $spam_report
357 cat >/etc
/exim
4/conf.d
/auth
/29_exim4-config_auth
<<'EOF'
358 # from 30_exim4-config_examples
363 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
364 server_set_id = $auth2
366 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
367 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
371 cat >/etc
/exim
4/conf.d
/router
/900_exim4-config_local_user
<<'EOF'
372 ### router/900_exim4-config_local_user
373 #################################
375 # This router matches local user mailboxes. If the router fails, the error
376 # message is "Unknown user".
379 debug_print = "R: local_user for $local_part@$domain"
381 domains = +local_domains
382 # ian: commented this, in conjunction with a dovecot lmtp
383 # change so I get mail for all users.
386 transport = LOCAL_DELIVERY
387 cannot_route_message = Unknown user
389 cat >/etc
/exim
4/conf.d
/transport
/30_exim4-config_dovecot_lmtp
<<'EOF'
392 socket = /var/run/dovecot/lmtp
393 #maximum number of deliveries per batch, default 1
397 cat >/etc
/exim
4/conf.d
/router
/190_exim4-config_fsfsmarthost
<<'EOF'
398 # smarthost for fsf mail
399 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
400 # replaced DCsmarthost with mail.fsf.org
402 debug_print = "R: smarthost for $local_part@$domain"
404 domains = ! +local_domains
406 transport = remote_smtp_smarthost
407 route_list = * mail.fsf.org byname
408 host_find_failed = ignore
409 same_domain_copy_routing = yes
414 #### begin mail cert setup ###
415 f
=/usr
/local
/bin
/mail-cert-cron
418 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
420 [[ $EUID == 0 ]] || exec sudo "$BASH_SOURCE" "$@"
422 f=/a/bin/bash_unpublished/source-state
426 if [[ $HOSTNAME == $MAIL_HOST ]]; then
427 local_mx=mail.iankelling.org
428 rsync_common="rsync -ogtL --chown=root:Debian-exim --chmod=640 root@li.iankelling.org:/etc/letsencrypt/live/$local_mx/"
429 ${rsync_common}fullchain.pem /etc/exim4/exim.crt
431 ${rsync_common}privkey.pem /etc/exim4/exim.key
433 if [[ $ret != $new_ret ]]; then
434 echo "$0: error: differing rsync returns, $ret, $new_ret"
438 if [[ $new_ret != 0 ]]; then
439 if ! openssl x509 -checkend $(( 60 * 60 * 24 * 3 )) -noout -in /etc/exim4/exim.crt; then
440 echo "$0: error!: cert rsync failed and it will expire in less than 3 days"
448 cat >/etc
/systemd
/system
/mailcert.service
<<'EOF'
450 Description=Mail cert rsync
451 After=multi-user.target
455 ExecStart=/a/bin/log-quiet/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
458 cat >/etc
/systemd
/system
/mailcert.timer
<<'EOF'
460 Description=Run mail-cert once a day
466 WantedBy=timers.target
468 systemctl daemon-reload
469 systemctl start mailcert
470 systemctl restart mailcert.timer
471 systemctl
enable mailcert.timer
473 ##### end mailcert setup #####
477 if [[ $HOSTNAME == $MAIL_HOST ]]; then
479 # mail.iankelling.org so local imap clients can connect with tls and
480 # when they happen to not be local.
481 sed -ri -f - /etc
/hosts
<<'EOF'
482 /^127\.0\.1\.1.* mail\.iankelling\.org\b/q
483 /^127\.0\.1\.1 /s/ *$/ mail.iankelling.org/
485 /a
/exe
/cedit
mail /etc
/dnsmasq-servers.conf
<<'EOF' || [[ $? == 1 ]]
486 server=/mail.iankelling.org/127.0.1.1
488 systemctl reload dnsmasq
490 debconf-set-selections
<<EOF
491 # Mail Server configuration
492 # -------------------------
494 # Please select the mail server configuration type that best meets your needs.
496 # Systems with dynamic IP addresses, including dialup systems, should generally be
497 # configured to send outgoing mail to another machine, called a 'smarthost' for
498 # delivery because many receiving systems on the Internet block incoming mail from
499 # dynamic IP addresses as spam protection.
501 # A system with a dynamic IP address can receive its own mail, or local delivery can be
502 # disabled entirely (except mail for root and postmaster).
504 # 1. internet site; mail is sent and received directly using SMTP
505 # 2. mail sent by smarthost; received via SMTP or fetchmail
506 # 3. mail sent by smarthost; no local mail
507 # 4. local delivery only; not on a network
508 # 5. no configuration at this time
510 # General type of mail configuration: 1
511 exim4-config exim4/dc_eximconfig_configtype select internet site; mail is sent and received directly using SMTP
515 # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
518 # This name will also be used by other programs. It should be the single, fully
519 # qualified domain name (FQDN).
521 # Thus, if a mail address on the local host is foo@example.org, the correct value for
522 # this option would be example.org.
524 # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
527 # iank: see comment elsewhere on mailname
528 exim4-config exim4/mailname string mail.iankelling.org
533 # Please enter a semicolon-separated list of recipient domains for which this machine
534 # should consider itself the final destination. These domains are commonly called
535 # 'local domains'. The local hostname (kd.lan) and 'localhost' are always added
536 # to the list given here.
538 # By default all local domains will be treated identically. If both a.example and
539 # b.example are local domains, acc@a.example and acc@b.example will be delivered to the
540 # same final destination. If different domain names should be treated differently, it
541 # is necessary to edit the config files afterwards.
543 # Other destinations for which mail is accepted:
544 # iank.bid is for testing
545 # mail.iankelling.org is for machines i own
546 exim4-config exim4/dc_other_hostnames string *.iankelling.org;iankelling.org;*iank.bid;iank.bid;*zroe.org;zroe.org;*.b8.nz;b8.nz;*.fsf.org;fsf.org
550 # Please enter a semicolon-separated list of IP addresses. The Exim SMTP listener
551 # daemon will listen on all IP addresses listed here.
553 # An empty value will cause Exim to listen for connections on all available network
556 # If this system only receives mail directly from local services (and not from other
557 # hosts), it is suggested to prohibit external connections to the local Exim daemon.
558 # Such services include e-mail programs (MUAs) which talk to localhost only as well as
559 # fetchmail. External connections are impossible when 127.0.0.1 is entered here, as
560 # this will disable listening on public network interfaces.
562 # IP-addresses to listen on for incoming SMTP connections:
563 exim4-config exim4/dc_local_interfaces string
568 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
569 # to the user account of the actual system administrator.
571 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
574 # Note that postmaster\'s mail should be read on the system to which it is directed,
575 # rather than being forwarded elsewhere, so (at least one of) the users listed here
576 # should not redirect their mail off this machine. A 'real-' prefix can be used to
577 # force local delivery.
579 # Multiple user names need to be separated by spaces.
581 # Root and postmaster mail recipient:
582 exim4-config exim4/dc_postmaster string $postmaster
586 # Exim is able to store locally delivered email in different formats. The most commonly
587 # used ones are mbox and Maildir. mbox uses a single file for the complete mail folder
588 # stored in /var/mail/. With Maildir format every single message is stored in a
589 # separate file in ~/Maildir/.
591 # Please note that most mail tools in Debian expect the local delivery method to be
592 # mbox in their default.
594 # 1. mbox format in /var/mail/ 2. Maildir format in home directory
596 # Delivery method for local mail: 2
597 exim4-config exim4/dc_localdelivery select Maildir format in home directory
599 echo mail.iankelling.org
> /etc
/mailname
601 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
602 # smarthost config type, not sure. all other settings
603 # would be unused in that config type.
604 rm -f /etc
/exim
4/conf.d
/main
/000_localmacros
# old filename
605 cat >/etc
/exim
4/conf.d
/main
/000_local
<<EOF
606 # enable 587 in addition to the default 25, so that
607 # i can send mail where port 25 is firewalled by isp
608 daemon_smtp_ports = 25 : 587
609 # i don't have ipv6 setup for my vpn tunnel yet.
612 MAIN_TLS_ENABLE = true
618 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
620 # The file is based on the outgoing domain-name in the from-header.
621 DKIM_DOMAIN = \${lc:\${domain:\$h_from:}}
623 DKIM_PRIVATE_KEY= \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
626 # failing message on mail-tester.com:
627 # We check if there is a server (A Record) behind your hostname kd.
628 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
629 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
630 # and this one seemed appropriate from grepping config.
631 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
632 # mail to kd, so this should basically be a name that no host has as their
633 # canonical hostname since the actual host sits behind a nat and changes.
634 # Seems logical for this to be the same as mailname.
635 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
637 # normally empty, I set this so I can set the envelope address
638 # when doing mail redelivery to invoke filters
639 MAIN_TRUSTED_GROUPS = $u
641 LOCAL_DELIVERY = dovecot_lmtp
643 # options exim has to avoid having to alter the default config files
644 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/rcpt_local_acl
645 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/data_local_acl
647 # debian exim config added this in 2016 or so?
648 # it's part of the smtp spec, to limit lines to 998 chars
649 # but a fair amount of legit mail does not adhere to it. I don't think
650 # this should be default, like it says in
651 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
652 # todo: the bug for introducing this was about headers, but
653 # the fix maybe is for all lines? one says gmail rejects, the
654 # other says gmail does not reject. figure out and open a new bug.
655 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
657 # most of the ones that gmail seems to use.
658 # Exim has horrible default of signing unincluded
659 # list- headers since they got mentioned in an
660 # rfc, but this messes up mailing lists, like gnu/debian which want to
661 # keep your dkim signature intact but add list- headers.
662 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
664 # recommended if dns is expected to work
665 CHECK_RCPT_VERIFY_SENDER = true
666 # seems like a good idea
667 CHECK_DATA_VERIFY_HEADER_SENDER = true
668 CHECK_RCPT_SPF = true
669 CHECK_RCPT_REVERSE_DNS = true
670 CHECK_MAIL_HELO_ISSUED = true
674 ####### begin dovecot setup ########
675 # based on a little google and package search, just the dovecot
676 # packages we need instead of dovecot-common.
678 # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
679 # directly. The reason to do this is to use dovecot\'s sieve, which
680 # has extensions that allow it to be almost equivalent to exim\'s
681 # filter capabilities, some ways probably better, some worse, and
682 # sieve has the benefit of being supported in postfix and
683 # proprietary/weird environments, so there is more examples on the
684 # internet. I was torn about whether to do this or not, meh.
685 pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd
687 # if we changed 90-sieve.conf and removed the active part of the
688 # sieve option, we wouldn\'t need this, but I\'d rather not modify a
689 # default config if not needed. This won\'t work as a symlink in /a/c
691 sudo
-u $u /a
/exe
/lnf
-T sieve
/main.sieve $
(eval echo ~
$u)/.dovecot.sieve
693 # we set this later in local.conf
694 sed -ri -f - /etc
/dovecot
/conf.d
/10-mail.conf
<<'EOF'
695 /^\s*mail_location\s*=/d
698 cat >/etc
/dovecot
/conf.d
/20-lmtp.conf
<<EOF
700 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
701 mail_plugins = \$mail_plugins sieve
703 #mail_plugins = \$mail_plugins
705 # For a normal setup with exim, we need something like this, which
706 # removes the domain part
707 # auth_username_format = %Ln
709 # or else # Exim says something like
710 # "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
711 # Dovecot verbose log says something like
712 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
713 # reference: http://wiki.dovecot.org/LMTP/Exim
715 # However, I use this to direct all mail to the same inbox.
716 # A normal way to do this, which I did at first is to have
717 # a router in exim almost at the end, eg 950,
719 # debug_print = "R: catchall for \$local_part@\$domain"
721 # domains = +local_domains
724 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
725 # with superflous options removed.
726 # However, this causes the envelope to be rewritten,
727 # which makes filtering into mailboxes a little less robust or more complicated,
728 # so I've done it this way instead. it also requires
729 # modifying the local router in exim.
730 auth_username_format = $u
736 cat >/etc
/dovecot
/local.conf
<<'EOF'
737 # so I can use a different login that my shell login for mail. this is
738 # worth doing solely for the reason that if this login is compromised,
739 # it won't also compromise my shell password.
740 !include conf.d/auth-passwdfile.conf.ext
742 # settings derived from wiki and 10-ssl.conf
744 ssl_cert = </etc/exim4/exim.crt
745 ssl_key = </etc/exim4/exim.key
746 # https://github.com/certbot/certbot/raw/master/certbot-apache/certbot_apache/options-ssl-apache.conf
747 # in my cert cronjob, I check if that has changed upstream.
748 ssl_cipher_list = ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
750 # ian: added this, more secure, per google etc
751 ssl_prefer_server_ciphers = yes
754 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
758 # for debugging info, uncomment these.
759 # logs go to syslog and to /var/log/mail.log
763 ####### end dovecot setup ########
765 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
766 d
=/etc
/systemd
/system
/openvpn@
mail
768 cat >$d/override.conf
<<'EOF'
771 # time to sleep before restarting a service
775 # StartLimitIntervalSec in recent systemd versions
779 systemctl
enable offlineimapsync.timer
780 systemctl start offlineimapsync.timer
781 systemctl
enable mailclean.timer
782 systemctl start mailclean.timer
783 systemctl restart
$vpn_ser@
mail
784 systemctl
enable $vpn_ser@
mail
785 systemctl
enable dovecot
786 systemctl restart dovecot
788 else # $HOSTNAME != $MAIL_HOST
789 # remove mail. 2 lines to properly remove whitespace
790 sed -ri -f - /etc
/hosts
<<'EOF'
791 s#^(127\.0\.1\.1 .*) +mail\.iankelling\.org$#\1#
792 s#^(127\.0\.1\.1 .*)mail\.iankelling\.org +(.*)#\1\2#
795 echo |
/a
/exe
/cedit
mail /etc
/dnsmasq-servers.conf ||
[[ $?
== 1 ]]
796 systemctl reload dnsmasq
798 systemctl disable offlineimapsync.timer
&>/dev
/null ||
:
799 systemctl stop offlineimapsync.timer
&>/dev
/null ||
:
800 systemctl disable mailclean.timer
&>/dev
/null ||
:
801 systemctl stop mailclean.timer
&>/dev
/null ||
:
802 systemctl disable
$vpn_ser@
mail
803 systemctl stop
$vpn_ser@
mail
804 systemctl disable dovecot ||
:
805 systemctl stop dovecot ||
:
808 # would only exist because I wrote it i the previous condition,
809 # it\'s not part of exim
810 rm -f /etc
/exim
4/conf.d
/main
/000_localmacros
811 debconf-set-selections
<<EOF
812 exim4-config exim4/dc_eximconfig_configtype select mail sent by smarthost; no local mail
813 exim4-config exim4/dc_smarthost string $smarthost
814 # afaik, on dpkg-reconfigure noninteractive, this sets /etc/mailname if it does not exist.
815 # if it does exist, it immediately changes the value to whats in /etc/mailname.
816 # So, I don't think there's any point in setting it, but might as well since
817 # ignoring what I set here is brain dead and might change.
818 exim4-config exim4/mailname string $(hostname -f)
820 hostname
-f > /etc
/mailname
822 fi # end $HOSTNAME != $MAIL_HOST
824 # if we already have it installed, need to reconfigure, without being prompted
825 if dpkg
-s exim4-config
&>/dev
/null
; then
826 # gotta remove this, otherwise the set-selections are completely
827 # ignored. It woulda been nice if this was documented somewhere!
828 rm -f /etc
/exim
4/update-exim4.conf.conf
829 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
830 dpkg-reconfigure
-u -fnoninteractive exim4-config
833 # i have the spool directory be common to distro multi-boot, so
834 # we need the uid to be the same. 608 cuz it's kind of in the middle
835 # of the free system uids.
836 IFS
=:; read _ _ uid _
< <(getent passwd Debian-exim ||
:) ||
:; unset IFS
837 IFS
=:; read _ _ gid _
< <(getent group Debian-exim ||
:) ||
:; unset IFS
838 if [[ ! $uid ]]; then
839 # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
840 adduser
--uid 608 --system --group --quiet --home /var
/spool
/exim4 \
841 --no-create-home --disabled-login --force-badname Debian-exim
842 elif [[ $uid != 608 ]]; then
843 systemctl stop exim4 ||
:
844 usermod
-u 608 Debian-exim
845 groupmod
-g 608 Debian-exim
846 usermod
-g 608 Debian-exim
847 find / /nocow
-xdev -uid $uid -exec chown
-h 608 {} +
848 find / /nocow
-xdev -gid $gid -exec chgrp
-h 608 {} +
852 # light version of exim does not have sasl auth support.
853 pi exim4-daemon-heavy spamassassin spf-tools-perl
857 ##### begin spamassassin config
858 systemctl
enable spamassassin
860 sed -i '/^\s*CRON\s*=/d' /etc
/default
/spamassassin
861 e CRON
=1 >>/etc
/default
/spamassassin
862 # just noticed this in the config file, seems like a good idea.
863 sed -i '/^\s*NICE\s*=/d' /etc
/default
/spamassassin
864 e
'NICE="--nicelevel 15"' >>/etc
/default
/spamassassin
865 systemctl start spamassassin
866 systemctl reload spamassassin
868 cat >/etc
/systemd
/system
/spamddnsfix.service
<<'EOF'
870 Description=spamd dns bug fix cronjob
874 ExecStart=/a/bin/distro-setup/spamd-dns-fix
876 # 2017-09, debian closed the bug on this saying upstream had fixed it.
877 # remove this when i\'m using the newer package, ie, debian 10, or maybe
879 cat >/etc
/systemd
/system
/spamddnsfix.timer
<<'EOF'
881 Description=run spamd bug fix script every 10 minutes
885 # the script looks back 9 minutes into the journal,
886 # it takes a second to run,
887 # so lets run every 9 minutes and 10 seconds.
891 WantedBy=timers.target
893 systemctl daemon-reload
894 systemctl restart spamddnsfix.timer
895 systemctl
enable spamddnsfix.timer
897 ##### end spamassassin config
903 # https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
904 # i only need .forwards, so just doing that one.
905 cd /etc
/exim
4/conf.d
/router
906 b
=userforward_higher_priority
907 # replace the router name so it is unique
908 sed -r s
/^
\\S
+:/$b:/ 600_exim4-config_userforward
>175_
$b
910 # begin setup passwd.client
911 f
=/etc
/exim
4/passwd.client
912 rm -f /etc
/exim
4/passwd.client
913 install -m 640 -g Debian-exim
/dev
/null
$f
914 cat /etc
/mailpass|
while read -r domain port pass
; do
915 # reference: exim4_passwd_client(5)
916 printf "%s:%s\n" "$domain" "$pass" >>$f
918 # end setup passwd.client
920 # by default, only 10 days of logs are kept. increase that.
921 sed -ri 's/^(\s*rotate\s).*/\11000/' /etc
/logrotate.d
/exim4-base
923 systemctl restart exim4
925 # /etc/alias setup is debian specific, and
926 # exim config sets up an /etc/alias from root to the postmaster, which i
927 # config to ian, as long as there exists an entry for root, or there was
928 # no preexisting aliases file. based on the postinst file. postfix
929 # won\'t set up a root to $postmaster alias if it\'s already installed.
930 # Since postfix is not the greatest, just set it ourselves.
931 if [[ $postmaster != root
]]; then
932 sed -i --follow-symlinks -f - /etc
/aliases
<<EOF
933 \$a root: $postmaster
939 # put spool dir in directory that spans multiple distros.
940 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
942 # todo: I\'m suspicious of uids for Debian-exim being the same across
943 # distros. It would be good to test this.
945 sdir
=/var
/spool
/exim4
946 # we only do this if our system has $dir
948 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
949 # about 2 seconds later, exim starts, and immediately puts into paniclog:
950 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
951 # so, im trying a bind mount to get rid of that.
952 if [[ -e /nocow
]]; then
953 if ! grep -Fx "/nocow/exim4 /var/spool/exim4 none bind 0 0" /etc
/fstab
; then
954 echo "/nocow/exim4 /var/spool/exim4 none bind 0 0" >> /etc
/fstab
956 if ! mountpoint
-q $sdir; then
958 if [[ -L $sdir ]]; then
961 if [[ ! -e $dir && -d $sdir ]]; then
964 if [[ ! -d $sdir ]]; then
966 chmod 000 $sdir # only want it to be used when its mounted
972 systemctl restart exim4
973 systemctl
enable exim4
976 if [[ $HOSTNAME == $MAIL_HOST ]]; then
977 cat >/etc
/cron.d
/mailtest
<<'EOF'
978 */10 * * * * iank echo body_test | mail -s "primary_test $(date +%s) $(date +%Y-%m-%dT%H:%M:%S%z)" iank@posteo.de
979 2/10 * * * * root /usr/local/bin/mailtest-check
981 cp /a
/bin
/distro-setup
/filesystem
/usr
/local
/bin
/mailtest-check
/usr
/local
/bin
983 rm -f /etc
/cron.d
/mailtest
986 # MAIL_HOST also does radicale, and easier to start and stop it here
987 # for when MAIL_HOST changes, so radicale gets the synced files and
988 # does not stop us from remounting /o.
989 if dpkg
-s radicale
&>/dev
/null
; then
990 if [[ $HOSTNAME == $MAIL_HOST ]]; then
991 systemctl restart radicale
992 systemctl
enable radicale
993 if [[ -e /etc
/logrotate.d
/radicale.disabled
]]; then
994 mv /etc
/logrotate.d
/radicale
{.disabled
,}
997 systemctl stop radicale
998 systemctl disable radicale
999 # weekly logrotate tries to restart radicale even if it's a disabled service in flidas.
1000 if [[ -e /etc
/logrotate.d
/radicale
]]; then
1001 mv /etc
/logrotate.d
/radicale
{,.disabled
}