1 { lib, pkgs, config, nodes, ... }:
3 config = lib.mkIf config.myServices.mail.enable {
5 "postfix/mysql_alias_maps" = {
6 user = config.services.postfix.user;
7 group = config.services.postfix.group;
10 # We need to specify that option to trigger ssl connection
12 user = ${config.myEnv.mail.postfix.mysql.user}
13 password = ${config.myEnv.mail.postfix.mysql.password}
14 hosts = unix:${config.myEnv.mail.postfix.mysql.socket}
15 dbname = ${config.myEnv.mail.postfix.mysql.database}
16 query = SELECT DISTINCT destination
19 ((regex = 1 AND '%s' REGEXP CONCAT('^',source,'$') ) OR (regex = 0 AND source = '%s'))
24 FROM forwardings_blacklisted
27 SELECT 'devnull@immae.eu'
28 FROM forwardings_blacklisted
32 "postfix/ldap_mailboxes" = {
33 user = config.services.postfix.user;
34 group = config.services.postfix.group;
37 server_host = ldaps://${config.myEnv.mail.dovecot.ldap.host}:636
38 search_base = ${config.myEnv.mail.dovecot.ldap.base}
39 query_filter = ${config.myEnv.mail.dovecot.ldap.postfix_mailbox_filter}
40 bind_dn = ${config.myEnv.mail.dovecot.ldap.dn}
41 bind_pw = ${config.myEnv.mail.dovecot.ldap.password}
42 result_attribute = immaePostfixAddress
47 "postfix/mysql_sender_login_maps" = {
48 user = config.services.postfix.user;
49 group = config.services.postfix.group;
52 # We need to specify that option to trigger ssl connection
54 user = ${config.myEnv.mail.postfix.mysql.user}
55 password = ${config.myEnv.mail.postfix.mysql.password}
56 hosts = unix:${config.myEnv.mail.postfix.mysql.socket}
57 dbname = ${config.myEnv.mail.postfix.mysql.database}
58 query = SELECT DISTINCT destination
62 (regex = 1 AND CONCAT(SUBSTRING_INDEX('%u', '+', 1), '@%d') REGEXP CONCAT('^',source,'$') )
64 (regex = 0 AND source = CONCAT(SUBSTRING_INDEX('%u', '+', 1), '@%d'))
67 UNION SELECT CONCAT(SUBSTRING_INDEX('%u', '+', 1), '@%d') AS destination
70 "postfix/mysql_sender_relays_maps" = {
71 user = config.services.postfix.user;
72 group = config.services.postfix.group;
75 # We need to specify that option to trigger ssl connection
77 user = ${config.myEnv.mail.postfix.mysql.user}
78 password = ${config.myEnv.mail.postfix.mysql.password}
79 hosts = unix:${config.myEnv.mail.postfix.mysql.socket}
80 dbname = ${config.myEnv.mail.postfix.mysql.database}
81 # INSERT INTO sender_relays
82 # (`from`, owner, relay, login, password, regex, active)
84 # ( 'sender@otherhost.org'
85 # , 'me@mail.immae.eu'
86 # , '[otherhost.org]:587'
88 # , AES_ENCRYPT('otherhostpassword', '${config.myEnv.mail.postfix.mysql.password_encrypt}')
92 query = SELECT DISTINCT `owner`
95 ((regex = 1 AND '%s' REGEXP CONCAT('^',`from`,'$') ) OR (regex = 0 AND `from` = '%s'))
99 "postfix/mysql_sender_relays_hosts" = {
100 user = config.services.postfix.user;
101 group = config.services.postfix.group;
102 permissions = "0440";
104 # We need to specify that option to trigger ssl connection
105 tls_ciphers = TLSv1.2
106 user = ${config.myEnv.mail.postfix.mysql.user}
107 password = ${config.myEnv.mail.postfix.mysql.password}
108 hosts = unix:${config.myEnv.mail.postfix.mysql.socket}
109 dbname = ${config.myEnv.mail.postfix.mysql.database}
111 query = SELECT DISTINCT relay
114 ((regex = 1 AND '%s' REGEXP CONCAT('^',`from`,'$') ) OR (regex = 0 AND `from` = '%s'))
118 "postfix/mysql_sender_relays_creds" = {
119 user = config.services.postfix.user;
120 group = config.services.postfix.group;
121 permissions = "0440";
123 # We need to specify that option to trigger ssl connection
124 tls_ciphers = TLSv1.2
125 user = ${config.myEnv.mail.postfix.mysql.user}
126 password = ${config.myEnv.mail.postfix.mysql.password}
127 hosts = unix:${config.myEnv.mail.postfix.mysql.socket}
128 dbname = ${config.myEnv.mail.postfix.mysql.database}
130 query = SELECT DISTINCT CONCAT(`login`, ':', AES_DECRYPT(`password`, '${config.myEnv.mail.postfix.mysql.password_encrypt}'))
133 ((regex = 1 AND '%s' REGEXP CONCAT('^',`from`,'$') ) OR (regex = 0 AND `from` = '%s'))
137 "postfix/ldap_ejabberd_users_immae_fr" = {
138 user = config.services.postfix.user;
139 group = config.services.postfix.group;
140 permissions = "0440";
142 server_host = ldaps://${config.myEnv.jabber.ldap.host}:636
143 search_base = ${config.myEnv.jabber.ldap.base}
144 query_filter = ${config.myEnv.jabber.postfix_user_filter}
146 bind_dn = ${config.myEnv.jabber.ldap.dn}
147 bind_pw = ${config.myEnv.jabber.ldap.password}
148 result_attribute = immaeXmppUid
149 result_format = ejabberd@localhost
153 } // lib.mapAttrs' (name: v: lib.nameValuePair "postfix/scripts/${name}-env" {
154 user = "postfixscripts";
156 permissions = "0400";
157 text = builtins.toJSON v.env;
158 }) config.myEnv.mail.scripts;
160 networking.firewall.allowedTCPPorts = [ 25 465 587 ];
162 users.users.postfixscripts = {
164 uid = config.ids.uids.postfixscripts;
165 description = "Postfix scripts user";
167 users.users."${config.services.postfix.user}".extraGroups = [ "keys" ];
168 services.filesWatcher.postfix = {
171 config.secrets.fullPaths."postfix/mysql_alias_maps"
172 config.secrets.fullPaths."postfix/ldap_mailboxes"
173 config.secrets.fullPaths."postfix/mysql_sender_login_maps"
174 config.secrets.fullPaths."postfix/ldap_ejabberd_users_immae_fr"
179 toScript = name: script: pkgs.writeScript name ''
180 #! ${pkgs.stdenv.shell}
181 mail=$(${pkgs.coreutils}/bin/cat -)
182 output=$(echo "$mail" | ${script} 2>&1)
185 if [ "$ret" != "0" ]; then
187 | ${pkgs.procmail}/bin/formail -i "X-Return-Code: $ret" \
188 | /run/wrappers/bin/sendmail -i scripts_error+${name}@mail.immae.eu
190 messageId=$(echo "$mail" | ${pkgs.procmail}/bin/formail -x "Message-Id:")
191 repeat=$(echo "$mail" | ${pkgs.procmail}/bin/formail -X "From:" -X "Received:")
193 ${pkgs.coreutils}/bin/cat <<EOF | /run/wrappers/bin/sendmail -i scripts_error+${name}@mail.immae.eu
195 To: scripts_error+${name}@mail.immae.eu
196 Subject: Log from script error
197 Content-Type: text/plain; charset="UTF-8"
198 Content-Transfer-Encoding: 8bit
199 References:$messageId
211 scripts = lib.attrsets.mapAttrs (n: v:
213 (pkgs.mylibs.flakeCompat
214 (builtins.fetchGit { url = v.src.url; ref = "master"; rev = v.src.rev; })
215 ).outputs.envToScript.x86_64-linux
216 config.secrets.fullPaths."postfix/scripts/${n}-env"
218 ) config.myEnv.mail.scripts // {
219 testmail = pkgs.writeScript "testmail" ''
220 #! ${pkgs.stdenv.shell}
221 ${pkgs.coreutils}/bin/touch \
222 "/var/lib/naemon/checks/email/$(${pkgs.procmail}/bin/formail -x To: | ${pkgs.coreutils}/bin/tr -d ' <>')"
225 in builtins.concatStringsSep "\n" (lib.attrsets.mapAttrsToList (n: v: ''${n}: "|${v}"'') scripts);
228 name = n: i: "relay_${n}_${toString i}";
229 pair = n: i: m: lib.attrsets.nameValuePair (name n i) (
231 then pkgs.writeText (name n i) m.content
234 pairs = n: v: lib.imap1 (i: m: pair n i m) v.recipient_maps;
235 in lib.attrsets.filterAttrs (k: v: v != null) (
236 lib.attrsets.listToAttrs (lib.flatten (
237 lib.attrsets.mapAttrsToList pairs config.myEnv.mail.postfix.backup_domains
240 relay_restrictions = lib.attrsets.filterAttrs (k: v: v != null) (
241 lib.attrsets.mapAttrs' (n: v:
242 lib.attrsets.nameValuePair "recipient_access_${n}" (
243 if lib.attrsets.hasAttr "relay_restrictions" v
244 then pkgs.writeText "recipient_access_${n}" v.relay_restrictions
247 ) config.myEnv.mail.postfix.backup_domains
251 cfg = config.myEnv.monitoring.email_check.eldiron;
252 address = "${cfg.mail_address}@${cfg.mail_domain}";
253 in pkgs.writeText "postfix-virtual" (
254 builtins.concatStringsSep "\n" (
255 ["${address} testmail@localhost"] ++
256 lib.attrsets.mapAttrsToList (
257 n: v: lib.optionalString v.external ''
258 script_${n}@mail.immae.eu ${n}@localhost, scripts@mail.immae.eu
260 ) config.myEnv.mail.scripts
265 host_sender_login = with lib.attrsets; let
266 addresses = zipAttrs (lib.flatten (mapAttrsToList
267 (n: v: (map (e: { "${e}" = "${n}@immae.eu"; }) v.emails)) config.myEnv.servers));
268 joined = builtins.concatStringsSep ",";
269 in pkgs.writeText "host-sender-login"
270 (builtins.concatStringsSep "\n" (mapAttrsToList (n: v: "${n} ${joined v}") addresses));
273 recipient_maps // relay_restrictions // virtual_map // sasl_access;
275 ### postfix module overrides
276 readme_directory = "${pkgs.postfix}/share/postfix/doc";
277 smtp_tls_CAfile = lib.mkForce "";
278 smtp_tls_cert_file = lib.mkForce "";
279 smtp_tls_key_file = lib.mkForce "";
281 message_size_limit = "1073741824"; # Don't put 0 here, it's not equivalent to "unlimited"
282 mailbox_size_limit = "1073741825"; # Workaround, local delivered mails should all go through scripts
283 alias_database = "\$alias_maps";
285 ### Aliases scripts user
286 default_privs = "postfixscripts";
288 ### Virtual mailboxes config
289 virtual_alias_maps = [
290 "hash:/etc/postfix/virtual"
291 "mysql:${config.secrets.fullPaths."postfix/mysql_alias_maps"}"
292 "ldap:${config.secrets.fullPaths."postfix/ldap_ejabberd_users_immae_fr"}"
294 virtual_mailbox_domains = config.myEnv.mail.postfix.additional_mailbox_domains
295 ++ lib.remove null (lib.flatten (map
298 then "${e.domain}${lib.optionalString (e.domain != "") "."}${zone.name}"
301 (zone.withEmail or [])
303 config.myEnv.dns.masterZones
305 virtual_mailbox_maps = [
306 "ldap:${config.secrets.fullPaths."postfix/ldap_mailboxes"}"
308 dovecot_destination_recipient_limit = "1";
309 virtual_transport = "dovecot";
312 relay_domains = lib.flatten (lib.attrsets.mapAttrsToList (n: v: v.domains or []) config.myEnv.mail.postfix.backup_domains);
313 relay_recipient_maps = lib.flatten (lib.attrsets.mapAttrsToList (n: v:
314 lib.imap1 (i: m: "${m.type}:/etc/postfix/relay_${n}_${toString i}") v.recipient_maps
315 ) config.myEnv.mail.postfix.backup_domains);
316 smtpd_relay_restrictions = [
317 "defer_unauth_destination"
318 ] ++ lib.flatten (lib.attrsets.mapAttrsToList (n: v:
319 if lib.attrsets.hasAttr "relay_restrictions" v
320 then [ "check_recipient_access hash:/etc/postfix/recipient_access_${n}" ]
322 ) config.myEnv.mail.postfix.backup_domains);
324 ### Additional smtpd configuration
325 smtpd_tls_received_header = "yes";
326 smtpd_tls_loglevel = "1";
328 ### Email sending configuration
329 smtp_tls_security_level = "may";
330 smtp_tls_loglevel = "1";
332 ### Force ip bind for smtp
333 smtp_bind_address = builtins.head config.hostEnv.ips.main.ip4;
334 smtp_bind_address6 = builtins.head config.hostEnv.ips.main.ip6;
336 # Use some relays when authorized senders are not myself
337 smtp_sasl_mechanism_filter = "plain,login"; # GSSAPI Not correctly supported by postfix
338 smtp_sasl_auth_enable = "yes";
339 smtp_sasl_password_maps =
340 "mysql:${config.secrets.fullPaths."postfix/mysql_sender_relays_creds"}";
341 smtp_sasl_security_options = "noanonymous";
342 smtp_sender_dependent_authentication = "yes";
343 sender_dependent_relayhost_maps =
344 "mysql:${config.secrets.fullPaths."postfix/mysql_sender_relays_hosts"}";
346 ### opendkim, opendmarc, openarc milters
347 non_smtpd_milters = [
348 "unix:${config.myServices.mail.milters.sockets.opendkim}"
351 "unix:${config.myServices.mail.milters.sockets.opendkim}"
352 "unix:${config.myServices.mail.milters.sockets.openarc}"
353 "unix:${config.myServices.mail.milters.sockets.opendmarc}"
357 smtpd_use_tls = true;
358 smtpd_tls_chain_files = builtins.concatStringsSep "," [ "/var/lib/acme/mail/full.pem" "/var/lib/acme/mail-rsa/full.pem" ];
360 maximal_queue_lifetime = "6w";
361 bounce_queue_lifetime = "6w";
365 enableSubmission = true;
366 submissionOptions = {
367 # Don’t use "long form", only commas (cf
368 # http://www.postfix.org/master.5.html long form is not handled
369 # well by the submission function)
370 smtpd_tls_security_level = "encrypt";
371 smtpd_sasl_auth_enable = "yes";
372 smtpd_tls_auth_only = "yes";
373 smtpd_sasl_tls_security_options = "noanonymous";
374 smtpd_sasl_type = "dovecot";
375 smtpd_sasl_path = "private/auth";
376 smtpd_reject_unlisted_recipient = "no";
377 smtpd_client_restrictions = "permit_sasl_authenticated,reject";
378 smtpd_relay_restrictions = "permit_sasl_authenticated,reject";
379 # Refuse to send e-mails with a From that is not handled
380 smtpd_sender_restrictions =
381 "reject_sender_login_mismatch,reject_unlisted_sender,permit_sasl_authenticated,reject";
382 smtpd_sender_login_maps = builtins.concatStringsSep "," [
383 "hash:/etc/postfix/host_sender_login"
384 "mysql:${config.secrets.fullPaths."postfix/mysql_sender_relays_maps"}"
385 "mysql:${config.secrets.fullPaths."postfix/mysql_sender_login_maps"}"
387 smtpd_recipient_restrictions = "permit_sasl_authenticated,reject";
388 milter_macro_daemon_name = "ORIGINATING";
389 smtpd_milters = builtins.concatStringsSep "," [
390 # FIXME: put it back when opensmtpd is upgraded and able to
391 # rewrite the from header
392 #"unix:/run/milter_verify_from/verify_from.sock"
393 "unix:${config.myServices.mail.milters.sockets.opendkim}"
396 destination = ["localhost"];
397 # This needs to reverse DNS
398 hostname = config.hostEnv.fqdn;
400 recipientDelimiter = "+";
406 args = ["-o" "smtpd_tls_wrappermode=yes" ] ++ (let
407 mkKeyVal = opt: val: [ "-o" (opt + "=" + val) ];
408 in lib.concatLists (lib.mapAttrsToList mkKeyVal config.services.postfix.submissionOptions)
417 # rspamd could be used as a milter, but then it cannot apply
418 # its checks "per user" (milter is not yet dispatched to
419 # users), so we wrap dovecot-lda inside rspamc per recipient
421 rspamc_dovecot = pkgs.writeScriptBin "rspamc_dovecot" ''
422 #! ${pkgs.stdenv.shell}
424 original_recipient="$2"
427 ${pkgs.coreutils}/bin/cat - | \
428 (${pkgs.rspamd}/bin/rspamc -h ${config.myServices.mail.rspamd.sockets.worker-controller} -c bayes -d "$user" --mime || true) | \
429 ${pkgs.dovecot}/libexec/dovecot/dovecot-lda -f "$sender" -a "$original_recipient" -d "$user"
432 "flags=ODRhu" "user=vhost:vhost"
433 "argv=${rspamc_dovecot}/bin/rspamc_dovecot \${sender} \${original_recipient} \${user}@\${nexthop}"
438 security.acme.certs."mail" = {
440 systemctl restart postfix.service
443 "smtp.immae.eu" = null;
446 security.acme.certs."mail-rsa" = {
448 systemctl restart postfix.service
451 "smtp.immae.eu" = null;
454 system.activationScripts.testmail = {
457 allCfg = config.myEnv.monitoring.email_check;
458 cfg = allCfg.eldiron;
459 reverseTargets = builtins.attrNames (lib.attrsets.filterAttrs (k: v: builtins.elem "eldiron" v.targets) allCfg);
460 to_email = cfg': host':
461 let sep = if lib.strings.hasInfix "+" cfg'.mail_address then "_" else "+";
462 in "${cfg'.mail_address}${sep}${host'}@${cfg'.mail_domain}";
463 mails_to_receive = builtins.concatStringsSep " " (map (to_email cfg) reverseTargets);
465 install -m 0555 -o postfixscripts -g keys -d /var/lib/naemon/checks/email
466 for f in ${mails_to_receive}; do
467 if [ ! -f /var/lib/naemon/checks/email/$f ]; then
468 install -m 0644 -o postfixscripts -g keys /dev/null -T /var/lib/naemon/checks/email/$f
469 touch -m -d @0 /var/lib/naemon/checks/email/$f
474 systemd.services.postfix.serviceConfig.Slice = "mail.slice";