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"
33 Usage: ${0##*/} exim4|postfix
34 Setup exim4 / postfix / dovecot
36 The minimal assumption we have is that /etc/mailpass exists
39 I've had problems with postfix on debian:
40 on stretch, a startup ordering issue caused all mail to fail.
41 postfix changed defaults to only use ipv6 dns, causing all my mail to fail.
42 I haven't gotten around to getting a non-debian exim
47 -h|--help Print help and exit.
53 postfix
() { [[ $type == postfix
]]; }
54 exim
() { [[ $type == exim4
]]; }
56 if ! exim
&& ! postfix
; then
62 ####### begin perstent password instructions ######
64 # # for hosts which have all private files I just use the same user
65 # # for other hosts, each one get\'s their own password.
66 # # for generating secure pass, and storing for server too:
67 # # user=USUALLY_SAME_AS_HOSTNAME
70 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$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 # echo "mail.iankelling.org $user $(<$f)" >> /p/c/machine_specific/$user/filesystem/etc/mailpass
74 # # then run this script, or part of it which uses /etc/mailpass
76 # # dovecot password, i just need 1 as I\'m the only user
77 # mkdir /p/c/filesystem/etc/dovecot
78 # echo "ian:$(doveadm pw -s ssha256)::::::" >/p/c/filesystem/etc/dovecot/users
83 # # for ad-hoc testing of some random new host sending mail:
84 # user=li # client host username & hostname
86 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
87 # s sed -i "/^$user:/d" /etc/exim4/passwd
88 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" | s tee -a /etc/exim4/passwd
89 # echo "mail.iankelling.org:$user:$(<$f)" | ssh root@$user dd of=/etc/exim4/passwd.client
90 ####### end perstent password instructions ######
93 ####### begin persistent dkim/dns instructions #########
94 # # Remove 1 level of comments in this section, set the domain var
95 # # for the domain you are setting up, then run this and copy dns settings
97 # domain=iankelling.org
98 # c /p/c/filesystem/etc/exim4
99 # # this has several bugs addressed in comments, but it was helpful
100 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
102 # openssl genrsa -out $domain-private.pem 2048 -outform PEM
103 # openssl rsa -in $domain-private.pem -out $domain.pem -pubout -outform PEM
104 # # selector is needed for having multiple keys for one domain.
105 # # I dun do that, so just use a static one: li
106 # echo "txt record name: li._domainkey.$domain"
107 # # Debadmin page does not have v=, fastmail does, and this
108 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
109 # # https://www.ietf.org/rfc/rfc6376.txt
110 # # Join and print all but first and last line.
111 # # last line: swap hold & pattern, remove newlines, print.
112 # # lines 2+: append to hold space
113 # echo "txt record contents:"
114 # echo "v=DKIM1; k=rsa; p=$(sed -n '${x;s/\n//gp};2,$H' $domain.pem)"
115 # chmod 644 $domain.pem
116 # chmod 640 $domain-private.pem
117 # # in conflink, we chown these to group debian
119 # # selector was also put into /etc/exim4/conf.d/main/000_localmacros,
120 # # via the mail-setup scripts
122 # # 2017-02 dmarc policies:
123 # # host -t txt _dmarc.gmail.com
124 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
125 # # there were articles claiming gmail would be changing
126 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
127 # # expected to cause problems
128 # # with a few old mailing lists, copying theirs for now.
130 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
132 # # 2017-02 spf policies:
133 # # host -t txt lists.fedoraproject.org
134 # # google ~all, hotmail -all, yahoo: ?all, fastmail ?all
135 # # i include fastmail\'s settings, per their instructions,
136 # # and follow their policy. In mail in a box, or similar instructions,
137 # # I\'ve seen recommended to not use a restrictive policy.
138 # echo "spf dns: name is empty, value: v=spf1 a include:spf.messagingengine.com ?all"
140 # # to check if dns has updated, you do
141 # host -a mesmtp._domainkey.$domain
144 # # setting it to iankelling.org would work the same, but this
145 # # is more flexible, I could change where mail.iankelling.org pointed.
147 # mx records, 2 records each, for * and empty domain
148 # pri 10 mail.iankelling.org
149 # pri 20 in1-smtp.messagingengine.com
150 # pri 30 in2-smtp.messagingengine.com
152 ####### end persistent dkim instructions #########
157 # /usr/share/doc/exim4-base/README.Debian.gz
158 # /usr/share/doc/exim4-base/spec.txt.gz
160 # routers, transports, and authenticators are sections, and you define
161 # driver instances in those sections, and the manual calls them driver
162 # types but there is also a more specific "type" of driver, which is specified
163 # with the driver = some_module setting in the driver.
165 # the driver option must precede and private options (options that are
166 # specific to that driver), so follow example of putting it at beginning.
168 # The full list of option settings for any particular driver instance,
169 # including all the defaulted values, can be extracted by making use of
170 # the -bP command line option.
171 # exim -bP config_file to see what config file it used
172 # exim -bP config to see
174 # exim clear out message queue. as root:
175 # adapted from somewhere on stackoverflow.
176 # ser stop exim4; sleep 1; exim -bp | exiqgrep -i | xargs exim -Mrm; ser start exim4
178 # fastmail has changed their smtp server, but the old one still works,
179 # I see no reason to bother changing.
180 # New one is smtp.fastmail.com
182 # test delivery & rewrite settings:
183 #exim4 -bt iank@localhost
190 postconf
-ev "${MAPFILE[@]}"
192 e
() { printf "%s\n" "$*"; }
193 pi
() { # package install
195 if dpkg
-s -- "$@" &> /dev
/null
; then
198 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
199 f
=/var
/cache
/apt
/pkgcache.bin
;
200 if [[ ! -r $f ]] ||
(( $
(( $
(date +%s
) - $
(stat
-c %Y
$f ) )) > 60*60*12 )); then
203 apt-get
-y install --purge --auto-remove "$@"
207 mxhost
=mail.iankelling.org
211 # old setup. left as comment for example
212 # mxhost=mail.messagingengine.com
214 # forward=ian@iankelling.org
216 relayhost
="[$mxhost]:$mxport" # postfix
217 smarthost
="$mxhost::$mxport" # exim
219 # trisquel 8 = openvpn, debian stretch = openvpn-client
220 vpn_ser
=openvpn-client
221 if [[ ! -e /lib
/systemd
/system
/openvpn-client@.service
]]; then
225 if [[ $HOSTNAME == $MAIL_HOST ]]; then
226 # afaik, these will get ignored because they are routing to my own
227 # machine, but rm them is safer
228 rm -f $
(eval echo ~
$postmaster)/.forward
/root
/.forward
230 # this can\'t be a symlink and has permission restrictions
231 # it might work in /etc/aliases, but this seems more proper.
232 install -m 644 {-o,-g}$postmaster <(e
$forward) $
(eval echo ~
$postmaster)/.forward
235 # offlineimap uses this too, it is much easier to use one location than to
236 # condition it\'s config and postfix\'s config
237 if [[ -f /etc
/fedora-release
]]; then
238 /a
/exe
/lnf
-T ca-certificates.crt
/etc
/ssl
/ca-bundle.trust.crt
242 # dunno why, but debian installed postfix with builddep emacs
243 # but I will just explicitly install it here since
244 # I use it for sending mail in emacs.
245 if command -v apt-get
&> /dev
/null
; then
246 debconf-set-selections
<<EOF
247 postfix postfix/main_mailer_type select Satellite system
248 postfix postfix/mailname string $HOSTNAME
249 postfix postfix/relayhost string $relayhost
250 postfix postfix/root_address string $postmaster
252 if dpkg
-s postfix
&>/dev
/null
; then
253 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
254 dpkg-reconfigure
-u -fnoninteractive postfix
259 source /a
/bin
/distro-functions
/src
/package-manager-abstractions
261 # Settings from reading the output when installing on debian,
262 # then seeing which were different in a default install on arch.
263 # I assume the same works for fedora.
265 mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
266 mailbox_size_limit = 0
267 relayhost = $relayhost
268 inet_interfaces = loopback-only
271 systemctl
enable postfix
272 systemctl start postfix
274 # i\'m assuming mail just won\'t work on systems without the sasl_passwd.
276 smtp_sasl_auth_enable = yes
277 smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
278 smtp_sasl_security_options = noanonymous
279 smtp_tls_security_level = secure
280 message_size_limit = 20480000
281 smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
282 inet_protocols = ipv4
284 # msg_size_limit: I ran into a log file not sending cuz of size. double from 10 to 20 meg limit
285 # inet_protocols: without this, I\'ve had postfix try an ipv6 lookup then gives
286 # up and fail forever. snippet from syslog: type=AAAA: Host not found, try again
289 f
=/etc
/postfix
/sasl_passwd
290 install -m 600 /dev
/null
$f
291 cat /etc
/mailpass|
while read -r domain port pass
; do
292 # format: domain port user:pass
293 # mailpass is just a name i made up, since postfix and
294 # exim both use a slightly crazy format to translate to
295 # each other, it\'s easier to use my own format.
296 printf "[%s]:%s %s" "$domain" "$port" "${pass/@/#}" >>$f
298 postmap
hash:/etc
/postfix
/sasl_passwd
299 # need restart instead of reload when changing
301 service postfix restart
303 else # begin exim. has debian specific stuff for now
307 if [[ -e /p
/c
/filesystem
]]; then
308 # allow failure of these commands when our internet is down, they are likely not needed,
309 # we check that a valid cert is there already.
310 # to put the hostname in the known hosts
311 if ! ssh -o StrictHostKeyChecking
=no root@li.iankelling.org
:; then
312 # This just causes failure if our cert is going to expire in the next 30 days.
313 # Certs I generate last 10 years.
314 openssl x509
-checkend $
(( 60 * 60 * 24 * 30 )) -noout -in /etc
/openvpn
/mail.crt
316 # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
317 # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
318 # after my internet was down for a bit:
319 # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
320 /a
/exe
/vpn-mk-client-cert
-b mail -n mail -s /b
/ds
/mail-route li.iankelling.org
324 cat >/etc
/systemd
/system
/offlineimapsync.timer
<<'EOF'
326 Description=Run offlineimap-sync once every min
332 WantedBy=timers.target
335 cat >/etc
/systemd
/system
/offlineimapsync.service
<<EOF
337 Description=Offlineimap sync
338 After=multi-user.target
343 ExecStart=/a/bin/log-quiet/sysd-mail-once offlineimap-sync /a/bin/distro-setup/offlineimap-sync
345 systemctl daemon-reload
347 # wording of question from dpkg-reconfigure exim4-config
348 # 1. internet site; mail is sent and received directly using SMTP
349 # 2. mail sent by smarthost; received via SMTP or fetchmail
350 # 3. mail sent by smarthost; no local mail
351 # 4. local delivery only; not on a network
352 # 5. no configuration at this time
354 # Note, I have used option 2 in the past for receiving mail
355 # from lan hosts, sending external mail via another smtp server.
357 # Note, other than configtype, we could set all the options in
358 # both types of configs without harm, they would either be
359 # ignored or be disabled by other settings, but the default
360 # local_interfaces definitely makes things more secure.
362 # most of these settings get translated into settings
363 # in /etc/exim4/update-exim4.conf.conf
364 # how /etc/exim4/update-exim4.conf.conf translates into actual exim settings is
365 # documented in man update-exim4.conf, which outputs to the config that
366 # exim actually reads. except the man page is not perfect, for example,
367 # it doesn't document that it sets
368 # DCconfig_${dc_eximconfig_configtype}" "1"
369 # which is a line from update-exim4.conf, which is a relatively short bash script.
370 # mailname setting sets /etc/mailname
372 debconf-set-selections
<<EOF
373 exim4-config exim4/use_split_config boolean true
376 source /a
/bin
/bash_unpublished
/source-semi-priv
377 mkdir
-p /etc
/exim
4/conf.d
/main
381 #### begin mail cert setup ###
382 f
=/usr
/local
/bin
/mail-cert-cron
385 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
387 [[ $EUID == 0 ]] || exec sudo "$BASH_SOURCE" "$@"
389 f=/a/bin/bash_unpublished/source-semi-priv
393 if [[ $HOSTNAME == $MAIL_HOST ]]; then
394 local_mx=mail.iankelling.org
395 rsync_common="rsync -ogtL --chown=root:Debian-exim --chmod=640 root@li:/etc/letsencrypt/live/$local_mx/"
396 ${rsync_common}fullchain.pem /etc/exim4/exim.crt
398 ${rsync_common}privkey.pem /etc/exim4/exim.key
400 if [[ $ret != $new_ret ]]; then
401 echo "$0: error: differing rsync returns, $ret, $new_ret"
405 if [[ $new_ret != 0 ]]; then
406 if ! openssl x509 -checkend $(( 60 * 60 * 24 * 3 )) -noout -in /etc/exim4/exim.crt; then
407 echo "$0: error!: cert rsync failed and it will expire in less than 3 days"
415 cat >/etc
/systemd
/system
/mailcert.service
<<'EOF'
417 Description=Mail cert rsync
418 After=multi-user.target
422 ExecStart=/a/bin/log-quiet/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
425 cat >/etc
/systemd
/system
/mailcert.timer
<<'EOF'
427 Description=Run mail-cert once a day
433 WantedBy=timers.target
435 systemctl daemon-reload
436 systemctl start mailcert
437 systemctl restart mailcert.timer
438 systemctl
enable mailcert.timer
440 ##### end mailcert setup #####
444 if [[ $HOSTNAME == $MAIL_HOST ]]; then
446 debconf-set-selections
<<EOF
447 # Mail Server configuration
448 # -------------------------
450 # Please select the mail server configuration type that best meets your needs.
452 # Systems with dynamic IP addresses, including dialup systems, should generally be
453 # configured to send outgoing mail to another machine, called a 'smarthost' for
454 # delivery because many receiving systems on the Internet block incoming mail from
455 # dynamic IP addresses as spam protection.
457 # A system with a dynamic IP address can receive its own mail, or local delivery can be
458 # disabled entirely (except mail for root and postmaster).
460 # 1. internet site; mail is sent and received directly using SMTP
461 # 2. mail sent by smarthost; received via SMTP or fetchmail
462 # 3. mail sent by smarthost; no local mail
463 # 4. local delivery only; not on a network
464 # 5. no configuration at this time
466 # General type of mail configuration: 1
467 exim4-config exim4/dc_eximconfig_configtype select internet site; mail is sent and received directly using SMTP
471 # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
474 # This name will also be used by other programs. It should be the single, fully
475 # qualified domain name (FQDN).
477 # Thus, if a mail address on the local host is foo@example.org, the correct value for
478 # this option would be example.org.
480 # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
483 exim4-config exim4/mailname string mail.iankelling.org
488 # Please enter a semicolon-separated list of recipient domains for which this machine
489 # should consider itself the final destination. These domains are commonly called
490 # 'local domains'. The local hostname (kd.lan) and 'localhost' are always added
491 # to the list given here.
493 # By default all local domains will be treated identically. If both a.example and
494 # b.example are local domains, acc@a.example and acc@b.example will be delivered to the
495 # same final destination. If different domain names should be treated differently, it
496 # is necessary to edit the config files afterwards.
498 # Other destinations for which mail is accepted:
499 # iank.bid is for testing
500 # mail.iankelling.org is for machines i own
501 exim4-config exim4/dc_other_hostnames string *.iankelling.org;iankelling.org;*iank.bid;iank.bid;*zroe.org;zroe.org;*.b8.nz;b8.nz
506 # Please enter a semicolon-separated list of IP addresses. The Exim SMTP listener
507 # daemon will listen on all IP addresses listed here.
509 # An empty value will cause Exim to listen for connections on all available network
512 # If this system only receives mail directly from local services (and not from other
513 # hosts), it is suggested to prohibit external connections to the local Exim daemon.
514 # Such services include e-mail programs (MUAs) which talk to localhost only as well as
515 # fetchmail. External connections are impossible when 127.0.0.1 is entered here, as
516 # this will disable listening on public network interfaces.
518 # IP-addresses to listen on for incoming SMTP connections:
519 exim4-config exim4/dc_local_interfaces string
524 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
525 # to the user account of the actual system administrator.
527 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
530 # Note that postmaster\'s mail should be read on the system to which it is directed,
531 # rather than being forwarded elsewhere, so (at least one of) the users listed here
532 # should not redirect their mail off this machine. A 'real-' prefix can be used to
533 # force local delivery.
535 # Multiple user names need to be separated by spaces.
537 # Root and postmaster mail recipient:
538 exim4-config exim4/dc_postmaster string $postmaster
542 # Exim is able to store locally delivered email in different formats. The most commonly
543 # used ones are mbox and Maildir. mbox uses a single file for the complete mail folder
544 # stored in /var/mail/. With Maildir format every single message is stored in a
545 # separate file in ~/Maildir/.
547 # Please note that most mail tools in Debian expect the local delivery method to be
548 # mbox in their default.
550 # 1. mbox format in /var/mail/ 2. Maildir format in home directory
552 # Delivery method for local mail: 2
553 exim4-config exim4/dc_localdelivery select Maildir format in home directory
555 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
556 # smarthost config type, not sure. all other settings
557 # would be unused in that config type.
558 cat >/etc
/exim
4/conf.d
/main
/000_localmacros
<<EOF
559 # i don't have ipv6 setup for my vpn tunnel yet.
562 MAIN_TLS_ENABLE = true
568 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
570 # The file is based on the outgoing domain-name in the from-header.
571 DKIM_DOMAIN = \${lc:\${domain:\$h_from:}}
573 DKIM_PRIVATE_KEY= \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
576 # failing message on mail-tester.com:
577 # We check if there is a server (A Record) behind your hostname kd.
578 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
579 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
580 # and this one seemed appropriate from grepping config.
581 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
582 # mail to kd, so this should basically be a name that no host has as their
583 # canonical hostname since the actual host sits behind a nat and changes.
584 # Seems logical for this to be the same as mailname.
585 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
587 # normally empty, I set this so I can set the envelope address
588 # when doing mail redelivery to invoke filters
589 MAIN_TRUSTED_GROUPS = $u
591 LOCAL_DELIVERY = dovecot_lmtp
593 # options exim has to avoid having to alter the default config files
594 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/rcpt_local_acl
595 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/data_local_acl
597 # debian exim config added this in 2016 or so?
598 # it's part of the smtp spec, to limit lines to 998 chars
599 # but a fair amount of legit mail does not adhere to it. I don't think
600 # this should be default, like it says in
601 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
602 # todo: the bug for introducing this was about headers, but
603 # the fix maybe is for all lines? one says gmail rejects, the
604 # other says gmail does not reject. figure out and open a new bug.
605 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
607 # most of the ones that gmail seems to use.
608 # Exim has horrible default of signing unincluded
609 # list- headers since they got mentioned in an
610 # rfc, but this messes up mailing lists, like gnu/debian which want to
611 # keep your dkim signature intact but add list- headers.
612 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
617 ####### begin dovecot setup ########
618 # based on a little google and package search, just the dovecot
619 # packages we need instead of dovecot-common.
621 # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
622 # directly. The reason to do this is to use dovecot\'s sieve, which
623 # has extensions that allow it to be almost equivalent to exim\'s
624 # filter capabilities, some ways probably better, some worse, and
625 # sieve has the benefit of being supported in postfix and
626 # proprietary/weird environments, so there is more examples on the
627 # internet. I was torn about whether to do this or not, meh.
628 pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd
630 # if we changed 90-sieve.conf and removed the active part of the
631 # sieve option, we wouldn\'t need this, but I\'d rather not modify a
632 # default config if not needed. This won\'t work as a symlink in /a/c
634 sudo
-u $postmaster /a
/exe
/lnf
-T sieve
/main.sieve $
(eval echo ~
$postmaster)/.dovecot.sieve
636 sed -ri -f - /etc
/dovecot
/conf.d
/10-mail.conf
<<'EOF'
637 1i mail_location = maildir:/m/md:LAYOUT=fs:INBOX=/m/md/INBOX
638 /^\s*mail_location\s*=/d
641 cat >/etc
/dovecot
/conf.d
/20-lmtp.conf
<<EOF
643 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
644 mail_plugins = \$mail_plugins sieve
646 #mail_plugins = \$mail_plugins
648 # For a normal setup with exim, we need something like this, which
649 # removes the domain part
650 # auth_username_format = %Ln
652 # or else # Exim says something like
653 # "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
654 # Dovecot verbose log says something like
655 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
656 # reference: http://wiki.dovecot.org/LMTP/Exim
658 # However, I use this to direct all mail to the same inbox.
659 # A normal way to do this, which I did at first is to have
660 # a router in exim almost at the end, eg 950,
662 # debug_print = "R: catchall for \$local_part@\$domain"
664 # domains = +local_domains
667 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
668 # with superflous options removed.
669 # However, this causes the envelope to be rewritten,
670 # which makes filtering into mailboxes a little less robust or more complicated,
671 # so I've done it this way instead. it also requires
672 # modifying the local router in exim.
673 auth_username_format = $u
679 cat >/etc
/dovecot
/local.conf
<<'EOF'
680 # so I can use a different login that my shell login for mail. this is
681 # worth doing solely for the reason that if this login is compromised,
682 # it won't also compromise my shell password.
683 !include conf.d/auth-passwdfile.conf.ext
685 # settings derived from wiki and 10-ssl.conf
687 ssl_cert = </etc/exim4/exim.crt
688 ssl_key = </etc/exim4/exim.key
689 # https://github.com/certbot/certbot/raw/master/certbot-apache/certbot_apache/options-ssl-apache.conf
690 # in my cert cronjob, I check if that has changed upstream.
691 ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
693 # ian: added this, more secure, per google etc
694 ssl_prefer_server_ciphers = yes
696 # for debugging info, uncomment these.
697 # logs go to syslog and to /var/log/mail.log
701 ####### end dovecot setup ########
704 systemctl
enable offlineimapsync.timer
705 systemctl start offlineimapsync.timer
706 systemctl restart
$vpn_ser@
mail
707 systemctl
enable $vpn_ser@
mail
708 systemctl
enable dovecot
709 systemctl restart dovecot
711 else # $HOSTNAME != $MAIL_HOST
712 systemctl disable offlineimapsync.timer
&>/dev
/null ||
:
713 systemctl stop offlineimapsync.timer
&>/dev
/null ||
:
714 systemctl disable
$vpn_ser@
mail
715 systemctl stop
$vpn_ser@
mail
716 systemctl disable dovecot ||
:
717 systemctl stop dovecot ||
:
720 # would only exist because I wrote it i the previous condition,
721 # it\'s not part of exim
722 rm -f /etc
/exim
4/conf.d
/main
/000_localmacros
723 debconf-set-selections
<<EOF
724 exim4-config exim4/dc_eximconfig_configtype select mail sent by smarthost; no local mail
725 exim4-config exim4/dc_smarthost string $smarthost
726 # the default, i think is from /etc/mailname. better to set it to
727 # whatever the current fqdn is.
728 exim4-config exim4/mailname string $(hostname -f)
731 fi # end $HOSTNAME != $MAIL_HOST
733 # if we already have it installed, need to reconfigure, without being prompted
734 if dpkg
-s exim4-config
&>/dev
/null
; then
735 # gotta remove this, otherwise the set-selections are completely
736 # ignored. It woulda been nice if this was documented somewhere!
737 rm -f /etc
/exim
4/update-exim4.conf.conf
738 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
739 dpkg-reconfigure
-u -fnoninteractive exim4-config
742 # i have the spool directory be common to distro multi-boot, so
743 # we need the uid to be the same. 608 cuz it's kind of in the middle
744 # of the free system uids.
745 IFS
=:; read _ _ uid _
< <(getent passwd Debian-exim ||
:) ||
:; unset IFS
746 IFS
=:; read _ _ gid _
< <(getent group Debian-exim ||
:) ||
:; unset IFS
747 if [[ ! $uid ]]; then
748 # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
749 adduser
--uid 608 --system --group --quiet --home /var
/spool
/exim4 \
750 --no-create-home --disabled-login --force-badname Debian-exim
751 elif [[ $uid != 608 ]]; then
752 systemctl stop exim4 ||
:
753 usermod
-u 608 Debian-exim
754 groupmod
-g 608 Debian-exim
755 usermod
-g 608 Debian-exim
756 find / /nocow
-xdev -uid $uid -exec chown
-h 608 {} +
757 find / /nocow
-xdev -gid $gid -exec chgrp
-h 608 {} +
760 # light version of exim does not have sasl auth support.
761 pi exim4-daemon-heavy spamassassin
766 ##### begin spamassassin config
767 systemctl
enable spamassassin
769 sed -i '/^\s*CRON\s*=/d' /etc
/default
/spamassassin
770 e CRON
=1 >>/etc
/default
/spamassassin
771 # just noticed this in the config file, seems like a good idea.
772 sed -i '/^\s*NICE\s*=/d' /etc
/default
/spamassassin
773 e
'NICE="--nicelevel 15"' >>/etc
/default
/spamassassin
774 systemctl start spamassassin
775 systemctl reload spamassassin
777 cat >/etc
/systemd
/system
/spamddnsfix.service
<<'EOF'
779 Description=spamd dns bug fix cronjob
783 ExecStart=/a/bin/distro-setup/spamd-dns-fix
785 # 2017-09, debian closed the bug on this saying upstream had fixed it.
786 # remove this when i\'m using the newer package, ie, debian 10, or maybe
788 cat >/etc
/systemd
/system
/spamddnsfix.timer
<<'EOF'
790 Description=run spamd bug fix script every 10 minutes
794 # the script looks back 9 minutes into the journal,
795 # it takes a second to run,
796 # so lets run every 9 minutes and 10 seconds.
800 WantedBy=timers.target
802 systemctl daemon-reload
803 systemctl restart spamddnsfix.timer
804 systemctl
enable spamddnsfix.timer
806 ##### end spamassassin config
812 cat >/etc
/exim
4/rcpt_local_acl
<<'EOF'
813 # Only hosts we control send to mail.iankelling.org, so make sure
814 # they are all authed.
815 # Note, if we wanted authed senders for all domains,
816 # we could make this condition in acl_check_mail
818 message = ian trusted domain recepient but no auth
820 domains = mail.iankelling.org
822 cat >/etc
/exim
4/data_local_acl
<<'EOF'
823 # Except for the "condition =", this was
824 # a comment in the check_data acl. The comment about this not
825 # being suitable is mostly bs. The only thing related I found was to
826 # add the condition =, cuz spamassassin has problems with big
827 # messages and spammers don't bother with big messages,
828 # but I've increased the size from 10k
829 # suggested in official docs, and 100k in the wiki example because
830 # those docs are rather old and I see a 110k spam message
831 # pretty quickly looking through my spam folder.
833 condition = ${if < {$message_size}{2000K}}
834 spam = Debian-exim:true
835 add_header = X-Spam_score: $spam_score\n\
836 X-Spam_score_int: $spam_score_int\n\
837 X-Spam_bar: $spam_bar\n\
838 X-Spam_report: $spam_report
841 cat >/etc
/exim
4/conf.d
/auth
/29_exim4-config_auth
<<'EOF'
842 # from 30_exim4-config_examples
847 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
848 server_set_id = $auth2
850 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
851 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
855 cat >/etc
/exim
4/conf.d
/router
/900_exim4-config_local_user
<<'EOF'
856 ### router/900_exim4-config_local_user
857 #################################
859 # This router matches local user mailboxes. If the router fails, the error
860 # message is "Unknown user".
863 debug_print = "R: local_user for $local_part@$domain"
865 domains = +local_domains
866 # ian: commented this, in conjunction with a dovecot lmtp
867 # change so I get mail for all users.
870 transport = LOCAL_DELIVERY
871 cannot_route_message = Unknown user
873 cat >/etc
/exim
4/conf.d
/transport
/30_exim4-config_dovecot_lmtp
<<'EOF'
876 socket = /var/run/dovecot/lmtp
877 #maximum number of deliveries per batch, default 1
881 cat >/etc
/exim
4/conf.d
/router
/190_exim4-config_fsfsmarthost
<<'EOF'
882 # smarthost for fsf mail
883 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
884 # replaced DCsmarthost with mail.fsf.org
886 debug_print = "R: smarthost for $local_part@$domain"
888 domains = ! +local_domains
890 transport = remote_smtp_smarthost
891 route_list = * mail.fsf.org byname
892 host_find_failed = ignore
893 same_domain_copy_routing = yes
897 # https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
898 # i only need .forwards, so just doing that one.
899 cd /etc
/exim
4/conf.d
/router
900 b
=userforward_higher_priority
901 # replace the router name so it is unique
902 sed -r s
/^
\\S
+:/$b:/ 600_exim4-config_userforward
>175_
$b
904 # begin setup passwd.client
905 f
=/etc
/exim
4/passwd.client
906 rm -f /etc
/exim
4/passwd.client
907 install -m 640 -g Debian-exim
/dev
/null
$f
908 cat /etc
/mailpass|
while read -r domain port pass
; do
909 # reference: exim4_passwd_client(5)
910 printf "%s:%s\n" "$domain" "$pass" >>$f
912 # end setup passwd.client
914 # by default, only 10 days of logs are kept. increase that.
915 sed -ri 's/^(\s*rotate\s).*/\11000/' /etc
/logrotate.d
/exim4-base
917 systemctl restart exim4
921 # /etc/alias setup is debian specific, and
922 # exim config sets up an /etc/alias from root to the postmaster, which i
923 # config to ian, as long as there exists an entry for root, or there was
924 # no preexisting aliases file. based on the postinst file. postfix
925 # won\'t set up a root to $postmaster alias if it\'s already installed.
926 # Since postfix is not the greatest, just set it ourselves.
927 if [[ $postmaster != root
]]; then
928 sed -i --follow-symlinks -f - /etc
/aliases
<<EOF
929 \$a root: $postmaster
935 # put spool dir in directory that spans multiple distros.
936 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
938 # todo: I\'m suspicious of uids for Debian-exim being the same across
939 # distros. It would be good to test this.
941 sdir
=/var
/spool
/$type
942 # we only do this if our system has $dir
943 if [[ -e /nocow
&& $
(readlink
-f $sdir) != $dir ]]; then
945 if [[ ! -e $dir && -d $sdir ]]; then
948 /a
/exe
/lnf
-T $dir $sdir
951 systemctl restart
$type
952 systemctl
enable $type
954 # MAIL_HOST also does radicale, and easier to start and stop it here
955 # for when MAIL_HOST changes, so radicale gets the synced files and
956 # does not stop us from remounting /o.
957 if dpkg
-s radicale
&>/dev
/null
; then
958 if [[ $HOSTNAME == $MAIL_HOST ]]; then
959 systemctl restart radicale
960 systemctl
enable radicale
961 if [[ -e /etc
/logrotate.d
/radicale.disabled
]]; then
962 mv /etc
/logrotate.d
/radicale
{.disabled
,}
965 systemctl stop radicale
966 systemctl disable radicale
967 # weekly logrotate tries to restart radicale even if it's a disabled service in flidas.
968 if [[ -e /etc
/logrotate.d
/radicale
]]; then
969 mv /etc
/logrotate.d
/radicale
{,.disabled
}
975 # if I wanted the from address to be renamed and sent to a different address,
976 # echo "sdx@localhost development@localhost" | sudo dd of=/etc/postfix/recipient_canonical
977 # sudo postmap hash:/etc/postfix/recipient_canonical
978 # sudo service postfix reload