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.
19 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
21 [[ $EUID == 0 ]] ||
exec sudo
-E "$BASH_SOURCE" "$@"
22 if [[ ! $SUDO_USER ]]; then
23 echo "$0: error: requires running as nonroot or sudo"
31 Usage: ${0##*/} exim4|postfix
32 Setup exim4 / postfix / dovecot
34 The minimal assumption we have is that /etc/mailpass exists
37 I've had problems with postfix on debian:
38 on stretch, a startup ordering issue caused all mail to fail.
39 postfix changed defaults to only use ipv6 dns, causing all my mail to fail.
40 I haven't gotten around to getting a non-debian exim
45 -h|--help Print help and exit.
51 postfix
() { [[ $type == postfix
]]; }
52 exim
() { [[ $type == exim4
]]; }
54 if ! exim
&& ! postfix
; then
60 ####### begin perstent password instructions ######
62 # # for hosts which have all private files I just use the same user
63 # # for other hosts, each one get\'s their own password.
64 # # for generating secure pass, and storing for server too:
65 # # user=USUALLY_SAME_AS_HOSTNAME
68 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
69 # s sed -i "/^$user:/d" /p/c/filesystem/etc/exim4/passwd
70 # echo "$user:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
71 # echo "mail.iankelling.org $user $(<$f)" >> /p/c/machine_specific/$user/filesystem/etc/mailpass
72 # # then run this script, or part of it which uses /etc/mailpass
74 # # dovecot password, i just need 1 as I\'m the only user
75 # mkdir /p/c/filesystem/etc/dovecot
76 # echo "ian:$(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
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.$domain
142 # # setting it to iankelling.org would work the same, but this
143 # # is more flexible, I could change where mail.iankelling.org pointed.
145 # mx records, 2 records each, for * and empty domain
146 # pri 10 mail.iankelling.org
147 # pri 20 in1-smtp.messagingengine.com
148 # pri 30 in2-smtp.messagingengine.com
150 ####### end persistent dkim instructions #########
155 # /usr/share/doc/exim4-base/README.Debian.gz
156 # /usr/share/doc/exim4-base/spec.txt.gz
158 # routers, transports, and authenticators are sections, and you define
159 # driver instances in those sections, and the manual calls them driver
160 # types but there is also a more specific "type" of driver, which is specified
161 # with the driver = some_module setting in the driver.
163 # the driver option must precede and private options (options that are
164 # specific to that driver), so follow example of putting it at beginning.
166 # The full list of option settings for any particular driver instance,
167 # including all the defaulted values, can be extracted by making use of
168 # the -bP command line option.
169 # exim -bP config_file to see what config file it used
170 # exim -bP config to see
172 # exim clear out message queue. as root:
173 # adapted from somewhere on stackoverflow.
174 # ser stop exim4; sleep 1; exim -bp | exiqgrep -i | xargs exim -Mrm; ser start exim4
176 # fastmail has changed their smtp server, but the old one still works,
177 # I see no reason to bother changing.
178 # New one is smtp.fastmail.com
180 # test delivery & rewrite settings:
181 #exim4 -bt iank@localhost
188 postconf
-ev "${MAPFILE[@]}"
190 e
() { printf "%s\n" "$*"; }
191 pi
() { # package install
193 if dpkg
-s -- "$@" &> /dev
/null
; then
196 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
197 f
=/var
/cache
/apt
/pkgcache.bin
;
198 if [[ ! -r $f ]] ||
(( $
(( $
(date +%s
) - $
(stat
-c %Y
$f ) )) > 60*60*12 )); then
201 apt-get
-y install --purge --auto-remove "$@"
205 mxhost
=mail.iankelling.org
209 # old setup. left as comment for example
210 # mxhost=mail.messagingengine.com
212 # forward=ian@iankelling.org
214 relayhost
="[$mxhost]:$mxport" # postfix
215 smarthost
="$mxhost::$mxport" # exim
217 # trisquel 8 = openvpn, debian stretch = openvpn-client
218 vpn_ser
=openvpn-client
219 if [[ ! -e /lib
/systemd
/system
/openvpn-client@.service
]]; then
223 if [[ $HOSTNAME == $MAIL_HOST ]]; then
224 # afaik, these will get ignored because they are routing to my own
225 # machine, but rm them is safer
226 rm -f $
(eval echo ~
$postmaster)/.forward
/root
/.forward
228 # this can\'t be a symlink and has permission restrictions
229 # it might work in /etc/aliases, but this seems more proper.
230 install -m 644 {-o,-g}$postmaster <(e
$forward) $
(eval echo ~
$postmaster)/.forward
233 # offlineimap uses this too, it is much easier to use one location than to
234 # condition it\'s config and postfix\'s config
235 if [[ -f /etc
/fedora-release
]]; then
236 /a
/exe
/lnf
-T ca-certificates.crt
/etc
/ssl
/ca-bundle.trust.crt
240 # dunno why, but debian installed postfix with builddep emacs
241 # but I will just explicitly install it here since
242 # I use it for sending mail in emacs.
243 if command -v apt-get
&> /dev
/null
; then
244 debconf-set-selections
<<EOF
245 postfix postfix/main_mailer_type select Satellite system
246 postfix postfix/mailname string $HOSTNAME
247 postfix postfix/relayhost string $relayhost
248 postfix postfix/root_address string $postmaster
250 if dpkg
-s postfix
&>/dev
/null
; then
251 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
252 dpkg-reconfigure
-u -fnoninteractive postfix
257 source /a
/bin
/distro-functions
/src
/package-manager-abstractions
259 # Settings from reading the output when installing on debian,
260 # then seeing which were different in a default install on arch.
261 # I assume the same works for fedora.
263 mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
264 mailbox_size_limit = 0
265 relayhost = $relayhost
266 inet_interfaces = loopback-only
269 systemctl
enable postfix
270 systemctl start postfix
272 # i\'m assuming mail just won\'t work on systems without the sasl_passwd.
274 smtp_sasl_auth_enable = yes
275 smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
276 smtp_sasl_security_options = noanonymous
277 smtp_tls_security_level = secure
278 message_size_limit = 20480000
279 smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
280 inet_protocols = ipv4
282 # msg_size_limit: I ran into a log file not sending cuz of size. double from 10 to 20 meg limit
283 # inet_protocols: without this, I\'ve had postfix try an ipv6 lookup then gives
284 # up and fail forever. snippet from syslog: type=AAAA: Host not found, try again
287 f
=/etc
/postfix
/sasl_passwd
288 install -m 600 /dev
/null
$f
289 cat /etc
/mailpass|
while read -r domain port pass
; do
290 # format: domain port user:pass
291 # mailpass is just a name i made up, since postfix and
292 # exim both use a slightly crazy format to translate to
293 # each other, it\'s easier to use my own format.
294 printf "[%s]:%s %s" "$domain" "$port" "${pass/@/#}" >>$f
296 postmap
hash:/etc
/postfix
/sasl_passwd
297 # need restart instead of reload when changing
299 service postfix restart
301 else # begin exim. has debian specific stuff for now
305 if [[ -e /p
/c
/filesystem
]]; then
306 # allow failure of these commands when our internet is down, they are likely not needed,
307 # we check that a valid cert is there already.
308 # to put the hostname in the known hosts
309 if ! ssh -o StrictHostKeyChecking
=no root@li.iankelling.org
:; then
310 # This just causes failure if our cert is going to expire in the next 30 days.
311 # Certs I generate last 10 years.
312 openssl x509
-checkend $
(( 60 * 60 * 24 * 30 )) -noout -in /etc
/openvpn
/mail.crt
314 # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
315 # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
316 # after my internet was down for a bit:
317 # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
318 /a
/exe
/vpn-mk-client-cert
-b mail -n mail -s /b
/ds
/mail-route li.iankelling.org
322 cat >/etc
/systemd
/system
/offlineimapsync.timer
<<'EOF'
324 Description=Run offlineimap-sync once every min
330 WantedBy=timers.target
333 cat >/etc
/systemd
/system
/offlineimapsync.service
<<EOF
335 Description=Offlineimap sync
336 After=multi-user.target
341 ExecStart=/a/bin/log-quiet/sysd-mail-once offlineimap-sync /a/bin/distro-setup/offlineimap-sync
343 systemctl daemon-reload
345 # wording of question from dpkg-reconfigure exim4-config
346 # 1. internet site; mail is sent and received directly using SMTP
347 # 2. mail sent by smarthost; received via SMTP or fetchmail
348 # 3. mail sent by smarthost; no local mail
349 # 4. local delivery only; not on a network
350 # 5. no configuration at this time
352 # Note, I have used option 2 in the past for receiving mail
353 # from lan hosts, sending external mail via another smtp server.
355 # Note, other than configtype, we could set all the options in
356 # both types of configs without harm, they would either be
357 # ignored or be disabled by other settings, but the default
358 # local_interfaces definitely makes things more secure.
360 # most of these settings get translated into settings
361 # in /etc/exim4/update-exim4.conf.conf
362 # how /etc/exim4/update-exim4.conf.conf translates into actual exim settings is
363 # documented in man update-exim4.conf, which outputs to the config that
364 # exim actually reads. except the man page is not perfect, for example,
365 # it doesn't document that it sets
366 # DCconfig_${dc_eximconfig_configtype}" "1"
367 # which is a line from update-exim4.conf, which is a relatively short bash script.
368 # mailname setting sets /etc/mailname
370 debconf-set-selections
<<EOF
371 exim4-config exim4/use_split_config boolean true
374 source /a
/bin
/bash_unpublished
/source-semi-priv
375 mkdir
-p /etc
/exim
4/conf.d
/main
379 #### begin mail cert setup ###
380 f
=/usr
/local
/bin
/mail-cert-cron
383 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
385 [[ $EUID == 0 ]] || exec sudo "$BASH_SOURCE" "$@"
387 f=/a/bin/bash_unpublished/source-semi-priv
391 if [[ $HOSTNAME == $MAIL_HOST ]]; then
392 local_mx=mail.iankelling.org
393 rsync_common="rsync -ogtL --chown=root:Debian-exim --chmod=640 root@li:/etc/letsencrypt/live/$local_mx/"
394 ${rsync_common}fullchain.pem /etc/exim4/exim.crt
396 ${rsync_common}privkey.pem /etc/exim4/exim.key
398 if [[ $ret != $new_ret ]]; then
399 echo "$0: error: differing rsync returns, $ret, $new_ret"
403 if [[ $new_ret != 0 ]]; then
404 if ! openssl x509 -checkend $(( 60 * 60 * 24 * 3 )) -noout -in /etc/exim4/exim.crt; then
405 echo "$0: error!: cert rsync failed and it will expire in less than 3 days"
413 cat >/etc
/systemd
/system
/mailcert.service
<<'EOF'
415 Description=Mail cert rsync
416 After=multi-user.target
420 ExecStart=/a/bin/log-quiet/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
423 cat >/etc
/systemd
/system
/mailcert.timer
<<'EOF'
425 Description=Run mail-cert once a day
431 WantedBy=timers.target
433 systemctl daemon-reload
434 systemctl start mailcert
435 systemctl restart mailcert.timer
436 systemctl
enable mailcert.timer
438 ##### end mailcert setup #####
442 if [[ $HOSTNAME == $MAIL_HOST ]]; then
444 debconf-set-selections
<<EOF
445 # Mail Server configuration
446 # -------------------------
448 # Please select the mail server configuration type that best meets your needs.
450 # Systems with dynamic IP addresses, including dialup systems, should generally be
451 # configured to send outgoing mail to another machine, called a 'smarthost' for
452 # delivery because many receiving systems on the Internet block incoming mail from
453 # dynamic IP addresses as spam protection.
455 # A system with a dynamic IP address can receive its own mail, or local delivery can be
456 # disabled entirely (except mail for root and postmaster).
458 # 1. internet site; mail is sent and received directly using SMTP
459 # 2. mail sent by smarthost; received via SMTP or fetchmail
460 # 3. mail sent by smarthost; no local mail
461 # 4. local delivery only; not on a network
462 # 5. no configuration at this time
464 # General type of mail configuration: 1
465 exim4-config exim4/dc_eximconfig_configtype select internet site; mail is sent and received directly using SMTP
469 # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
472 # This name will also be used by other programs. It should be the single, fully
473 # qualified domain name (FQDN).
475 # Thus, if a mail address on the local host is foo@example.org, the correct value for
476 # this option would be example.org.
478 # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
481 exim4-config exim4/mailname string mail.iankelling.org
486 # Please enter a semicolon-separated list of recipient domains for which this machine
487 # should consider itself the final destination. These domains are commonly called
488 # 'local domains'. The local hostname (kd.lan) and 'localhost' are always added
489 # to the list given here.
491 # By default all local domains will be treated identically. If both a.example and
492 # b.example are local domains, acc@a.example and acc@b.example will be delivered to the
493 # same final destination. If different domain names should be treated differently, it
494 # is necessary to edit the config files afterwards.
496 # Other destinations for which mail is accepted:
497 # iank.bid is for testing
498 # mail.iankelling.org is for machines i own
499 exim4-config exim4/dc_other_hostnames string *.iankelling.org;iankelling.org;*iank.bid;iank.bid;*zroe.org;zroe.org;*.b8.nz;b8.nz
504 # Please enter a semicolon-separated list of IP addresses. The Exim SMTP listener
505 # daemon will listen on all IP addresses listed here.
507 # An empty value will cause Exim to listen for connections on all available network
510 # If this system only receives mail directly from local services (and not from other
511 # hosts), it is suggested to prohibit external connections to the local Exim daemon.
512 # Such services include e-mail programs (MUAs) which talk to localhost only as well as
513 # fetchmail. External connections are impossible when 127.0.0.1 is entered here, as
514 # this will disable listening on public network interfaces.
516 # IP-addresses to listen on for incoming SMTP connections:
517 exim4-config exim4/dc_local_interfaces string
522 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
523 # to the user account of the actual system administrator.
525 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
528 # Note that postmaster\'s mail should be read on the system to which it is directed,
529 # rather than being forwarded elsewhere, so (at least one of) the users listed here
530 # should not redirect their mail off this machine. A 'real-' prefix can be used to
531 # force local delivery.
533 # Multiple user names need to be separated by spaces.
535 # Root and postmaster mail recipient:
536 exim4-config exim4/dc_postmaster string $postmaster
540 # Exim is able to store locally delivered email in different formats. The most commonly
541 # used ones are mbox and Maildir. mbox uses a single file for the complete mail folder
542 # stored in /var/mail/. With Maildir format every single message is stored in a
543 # separate file in ~/Maildir/.
545 # Please note that most mail tools in Debian expect the local delivery method to be
546 # mbox in their default.
548 # 1. mbox format in /var/mail/ 2. Maildir format in home directory
550 # Delivery method for local mail: 2
551 exim4-config exim4/dc_localdelivery select Maildir format in home directory
553 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
554 # smarthost config type, not sure. all other settings
555 # would be unused in that config type.
556 cat >/etc
/exim
4/conf.d
/main
/000_localmacros
<<EOF
557 # i don't have ipv6 setup for my vpn tunnel yet.
560 MAIN_TLS_ENABLE = true
566 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
568 # The file is based on the outgoing domain-name in the from-header.
569 DKIM_DOMAIN = \${lc:\${domain:\$h_from:}}
571 DKIM_PRIVATE_KEY= \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
574 # failing message on mail-tester.com:
575 # We check if there is a server (A Record) behind your hostname kd.
576 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
577 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
578 # and this one seemed appropriate from grepping config.
579 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
580 # mail to kd, so this should basically be a name that no host has as their
581 # canonical hostname since the actual host sits behind a nat and changes.
582 # Seems logical for this to be the same as mailname.
583 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
585 # normally empty, I set this so I can set the envelope address
586 # when doing mail redelivery to invoke filters
587 MAIN_TRUSTED_GROUPS = $u
589 LOCAL_DELIVERY = dovecot_lmtp
591 # options exim has to avoid having to alter the default config files
592 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/rcpt_local_acl
593 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/data_local_acl
595 # debian exim config added this in 2016 or so?
596 # it's part of the smtp spec, to limit lines to 998 chars
597 # but a fair amount of legit mail does not adhere to it. I don't think
598 # this should be default, like it says in
599 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
600 # todo: the bug for introducing this was about headers, but
601 # the fix maybe is for all lines? one says gmail rejects, the
602 # other says gmail does not reject. figure out and open a new bug.
603 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
605 # most of the ones that gmail seems to use.
606 # Exim has horrible default of signing unincluded
607 # list- headers since they got mentioned in an
608 # rfc, but this messes up mailing lists, like gnu/debian which want to
609 # keep your dkim signature intact but add list- headers.
610 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
615 ####### begin dovecot setup ########
616 # based on a little google and package search, just the dovecot
617 # packages we need instead of dovecot-common.
619 # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
620 # directly. The reason to do this is to use dovecot\'s sieve, which
621 # has extensions that allow it to be almost equivalent to exim\'s
622 # filter capabilities, some ways probably better, some worse, and
623 # sieve has the benefit of being supported in postfix and
624 # proprietary/weird environments, so there is more examples on the
625 # internet. I was torn about whether to do this or not, meh.
626 pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd
628 # if we changed 90-sieve.conf and removed the active part of the
629 # sieve option, we wouldn\'t need this, but I\'d rather not modify a
630 # default config if not needed. This won\'t work as a symlink in /a/c
632 sudo
-u $postmaster /a
/exe
/lnf
-T sieve
/main.sieve $
(eval echo ~
$postmaster)/.dovecot.sieve
634 sed -ri -f - /etc
/dovecot
/conf.d
/10-mail.conf
<<'EOF'
635 1i mail_location = maildir:/m/md:LAYOUT=fs:INBOX=/m/md/INBOX
636 /^\s*mail_location\s*=/d
639 cat >/etc
/dovecot
/conf.d
/20-lmtp.conf
<<EOF
641 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
642 mail_plugins = \$mail_plugins sieve
644 #mail_plugins = \$mail_plugins
646 # For a normal setup with exim, we need something like this, which
647 # removes the domain part
648 # auth_username_format = %Ln
650 # or else # Exim says something like
651 # "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
652 # Dovecot verbose log says something like
653 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
654 # reference: http://wiki.dovecot.org/LMTP/Exim
656 # However, I use this to direct all mail to the same inbox.
657 # A normal way to do this, which I did at first is to have
658 # a router in exim almost at the end, eg 950,
660 # debug_print = "R: catchall for \$local_part@\$domain"
662 # domains = +local_domains
665 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
666 # with superflous options removed.
667 # However, this causes the envelope to be rewritten,
668 # which makes filtering into mailboxes a little less robust or more complicated,
669 # so I've done it this way instead. it also requires
670 # modifying the local router in exim.
671 auth_username_format = $u
677 cat >/etc
/dovecot
/local.conf
<<'EOF'
678 # so I can use a different login that my shell login for mail. this is
679 # worth doing solely for the reason that if this login is compromised,
680 # it won't also compromise my shell password.
681 !include conf.d/auth-passwdfile.conf.ext
683 # settings derived from wiki and 10-ssl.conf
685 ssl_cert = </etc/exim4/exim.crt
686 ssl_key = </etc/exim4/exim.key
687 # https://github.com/certbot/certbot/raw/master/certbot-apache/certbot_apache/options-ssl-apache.conf
688 # in my cert cronjob, I check if that has changed upstream.
689 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
691 # ian: added this, more secure, per google etc
692 ssl_prefer_server_ciphers = yes
694 # for debugging info, uncomment these.
695 # logs go to syslog and to /var/log/mail.log
699 ####### end dovecot setup ########
702 systemctl
enable offlineimapsync.timer
703 systemctl start offlineimapsync.timer
704 systemctl restart
$vpn_ser@
mail
705 systemctl
enable $vpn_ser@
mail
706 systemctl
enable dovecot
707 systemctl restart dovecot
709 else # $HOSTNAME != $MAIL_HOST
710 systemctl disable offlineimapsync.timer
&>/dev
/null ||
:
711 systemctl stop offlineimapsync.timer
&>/dev
/null ||
:
712 systemctl disable
$vpn_ser@
mail
713 systemctl stop
$vpn_ser@
mail
714 systemctl disable dovecot ||
:
715 systemctl stop dovecot ||
:
718 # would only exist because I wrote it i the previous condition,
719 # it\'s not part of exim
720 rm -f /etc
/exim
4/conf.d
/main
/000_localmacros
721 debconf-set-selections
<<EOF
722 exim4-config exim4/dc_eximconfig_configtype select mail sent by smarthost; no local mail
723 exim4-config exim4/dc_smarthost string $smarthost
724 # the default, i think is from /etc/mailname. better to set it to
725 # whatever the current fqdn is.
726 exim4-config exim4/mailname string $(hostname -f)
729 fi # end $HOSTNAME != $MAIL_HOST
731 # if we already have it installed, need to reconfigure, without being prompted
732 if dpkg
-s exim4-config
&>/dev
/null
; then
733 # gotta remove this, otherwise the set-selections are completely
734 # ignored. It woulda been nice if this was documented somewhere!
735 rm -f /etc
/exim
4/update-exim4.conf.conf
736 while fuser
/var
/lib
/dpkg
/lock
&>/dev
/null
; do sleep 1; done
737 dpkg-reconfigure
-u -fnoninteractive exim4-config
740 # i have the spool directory be common to distro multi-boot, so
741 # we need the uid to be the same. 608 cuz it's kind of in the middle
742 # of the free system uids.
743 IFS
=:; read _ _ uid _
< <(getent passwd Debian-exim ||
:) ||
:; unset IFS
744 IFS
=:; read _ _ gid _
< <(getent group Debian-exim ||
:) ||
:; unset IFS
745 if [[ ! $uid ]]; then
746 # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
747 adduser
--uid 608 --system --group --quiet --home /var
/spool
/exim4 \
748 --no-create-home --disabled-login --force-badname Debian-exim
749 elif [[ $uid != 608 ]]; then
750 systemctl stop exim4 ||
:
751 usermod
-u 608 Debian-exim
752 groupmod
-g 608 Debian-exim
753 usermod
-g 608 Debian-exim
754 find / /nocow
-xdev -uid $uid -exec chown
-h 608 {} +
755 find / /nocow
-xdev -gid $gid -exec chgrp
-h 608 {} +
758 # light version of exim does not have sasl auth support.
759 pi exim4-daemon-heavy spamassassin
764 ##### begin spamassassin config
765 systemctl
enable spamassassin
767 sed -i '/^\s*CRON\s*=/d' /etc
/default
/spamassassin
768 e CRON
=1 >>/etc
/default
/spamassassin
769 # just noticed this in the config file, seems like a good idea.
770 sed -i '/^\s*NICE\s*=/d' /etc
/default
/spamassassin
771 e
'NICE="--nicelevel 15"' >>/etc
/default
/spamassassin
772 systemctl start spamassassin
773 systemctl reload spamassassin
775 cat >/etc
/systemd
/system
/spamddnsfix.service
<<'EOF'
777 Description=spamd dns bug fix cronjob
781 ExecStart=/a/bin/distro-setup/spamd-dns-fix
783 # 2017-09, debian closed the bug on this saying upstream had fixed it.
784 # remove this when i\'m using the newer package, ie, debian 10, or maybe
786 cat >/etc
/systemd
/system
/spamddnsfix.timer
<<'EOF'
788 Description=run spamd bug fix script every 10 minutes
792 # the script looks back 9 minutes into the journal,
793 # it takes a second to run,
794 # so lets run every 9 minutes and 10 seconds.
798 WantedBy=timers.target
800 systemctl daemon-reload
801 systemctl restart spamddnsfix.timer
802 systemctl
enable spamddnsfix.timer
804 ##### end spamassassin config
810 cat >/etc
/exim
4/rcpt_local_acl
<<'EOF'
811 # Only hosts we control send to mail.iankelling.org, so make sure
812 # they are all authed.
813 # Note, if we wanted authed senders for all domains,
814 # we could make this condition in acl_check_mail
816 message = ian trusted domain recepient but no auth
818 domains = mail.iankelling.org
820 cat >/etc
/exim
4/data_local_acl
<<'EOF'
821 # Except for the "condition =", this was
822 # a comment in the check_data acl. The comment about this not
823 # being suitable is mostly bs. The only thing related I found was to
824 # add the condition =, cuz spamassassin has problems with big
825 # messages and spammers don't bother with big messages,
826 # but I've increased the size from 10k
827 # suggested in official docs, and 100k in the wiki example because
828 # those docs are rather old and I see a 110k spam message
829 # pretty quickly looking through my spam folder.
831 condition = ${if < {$message_size}{2000K}}
832 spam = Debian-exim:true
833 add_header = X-Spam_score: $spam_score\n\
834 X-Spam_score_int: $spam_score_int\n\
835 X-Spam_bar: $spam_bar\n\
836 X-Spam_report: $spam_report
839 cat >/etc
/exim
4/conf.d
/auth
/29_exim4-config_auth
<<'EOF'
840 # from 30_exim4-config_examples
845 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
846 server_set_id = $auth2
848 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
849 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
853 cat >/etc
/exim
4/conf.d
/router
/900_exim4-config_local_user
<<'EOF'
854 ### router/900_exim4-config_local_user
855 #################################
857 # This router matches local user mailboxes. If the router fails, the error
858 # message is "Unknown user".
861 debug_print = "R: local_user for $local_part@$domain"
863 domains = +local_domains
864 # ian: commented this, in conjunction with a dovecot lmtp
865 # change so I get mail for all users.
868 transport = LOCAL_DELIVERY
869 cannot_route_message = Unknown user
871 cat >/etc
/exim
4/conf.d
/transport
/30_exim4-config_dovecot_lmtp
<<'EOF'
874 socket = /var/run/dovecot/lmtp
875 #maximum number of deliveries per batch, default 1
879 cat >/etc
/exim
4/conf.d
/router
/190_exim4-config_fsfsmarthost
<<'EOF'
880 # smarthost for fsf mail
881 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
882 # replaced DCsmarthost with mail.fsf.org
884 debug_print = "R: smarthost for $local_part@$domain"
886 domains = ! +local_domains
888 transport = remote_smtp_smarthost
889 route_list = * mail.fsf.org byname
890 host_find_failed = ignore
891 same_domain_copy_routing = yes
895 # https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
896 # i only need .forwards, so just doing that one.
897 cd /etc
/exim
4/conf.d
/router
898 b
=userforward_higher_priority
899 # replace the router name so it is unique
900 sed -r s
/^
\\S
+:/$b:/ 600_exim4-config_userforward
>175_
$b
902 # begin setup passwd.client
903 f
=/etc
/exim
4/passwd.client
904 rm -f /etc
/exim
4/passwd.client
905 install -m 640 -g Debian-exim
/dev
/null
$f
906 cat /etc
/mailpass|
while read -r domain port pass
; do
907 # reference: exim4_passwd_client(5)
908 printf "%s:%s\n" "$domain" "$pass" >>$f
910 # end setup passwd.client
912 # by default, only 10 days of logs are kept. increase that.
913 sed -ri 's/^(\s*rotate\s).*/\11000/' /etc
/logrotate.d
/exim4-base
915 systemctl restart exim4
919 # /etc/alias setup is debian specific, and
920 # exim config sets up an /etc/alias from root to the postmaster, which i
921 # config to ian, as long as there exists an entry for root, or there was
922 # no preexisting aliases file. based on the postinst file. postfix
923 # won\'t set up a root to $postmaster alias if it\'s already installed.
924 # Since postfix is not the greatest, just set it ourselves.
925 if [[ $postmaster != root
]]; then
926 sed -i --follow-symlinks -f - /etc
/aliases
<<EOF
927 \$a root: $postmaster
933 # put spool dir in directory that spans multiple distros.
934 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
936 # todo: I\'m suspicious of uids for Debian-exim being the same across
937 # distros. It would be good to test this.
939 sdir
=/var
/spool
/$type
940 # we only do this if our system has $dir
941 if [[ -e /nocow
&& $
(readlink
-f $sdir) != $dir ]]; then
943 if [[ ! -e $dir && -d $sdir ]]; then
946 /a
/exe
/lnf
-T $dir $sdir
949 systemctl restart
$type
950 systemctl
enable $type
952 # MAIL_HOST also does radicale, and easier to start and stop it here
953 # for when MAIL_HOST changes, so radicale gets the synced files and
954 # does not stop us from remounting /o.
955 if dpkg
-s radicale
&>/dev
/null
; then
956 if [[ $HOSTNAME == $MAIL_HOST ]]; then
957 systemctl restart radicale
958 systemctl
enable radicale
959 if [[ -e /etc
/logrotate.d
/radicale.disabled
]]; then
960 mv /etc
/logrotate.d
/radicale
{.disabled
,}
963 systemctl stop radicale
964 systemctl disable radicale
965 # weekly logrotate tries to restart radicale even if it's a disabled service in flidas.
966 if [[ -e /etc
/logrotate.d
/radicale
]]; then
967 mv /etc
/logrotate.d
/radicale
{,.disabled
}
973 # if I wanted the from address to be renamed and sent to a different address,
974 # echo "sdx@localhost development@localhost" | sudo dd of=/etc/postfix/recipient_canonical
975 # sudo postmap hash:/etc/postfix/recipient_canonical
976 # sudo service postfix reload