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{ lib, pkgs, config, nodes, name, ... }:
{
config = lib.mkIf config.myServices.mailBackup.enable {
security.acme.certs."mail" = config.myServices.certificates.certConfig // {
postRun = ''
systemctl restart postfix.service
'';
domain = config.hostEnv.fqdn;
extraDomains = let
zonesWithMx = builtins.filter (zone:
lib.attrsets.hasAttr "withEmail" zone && lib.lists.length zone.withEmail > 0
) config.myEnv.dns.masterZones;
mxs = map (zone: "${config.myEnv.servers."${name}".mx.subdomain}.${zone.name}") zonesWithMx;
in builtins.listToAttrs (map (mx: lib.attrsets.nameValuePair mx null) mxs);
};
secrets.keys = [
{
dest = "postfix/mysql_alias_maps";
user = config.services.postfix.user;
group = config.services.postfix.group;
permissions = "0440";
text = ''
# We need to specify that option to trigger ssl connection
tls_ciphers = TLSv1.2
user = ${config.myEnv.mail.postfix.mysql.user}
password = ${config.myEnv.mail.postfix.mysql.password}
hosts = ${config.myEnv.mail.postfix.mysql.remoteHost}
dbname = ${config.myEnv.mail.postfix.mysql.database}
query = SELECT DISTINCT 1
FROM forwardings
WHERE
((regex = 1 AND '%s' REGEXP CONCAT('^',source,'$') ) OR (regex = 0 AND source = '%s'))
AND active = 1
AND '%s' NOT IN
(
SELECT source
FROM forwardings_blacklisted
WHERE source = '%s'
) UNION
SELECT 'devnull@immae.eu'
FROM forwardings_blacklisted
WHERE source = '%s'
'';
}
{
dest = "postfix/ldap_mailboxes";
user = config.services.postfix.user;
group = config.services.postfix.group;
permissions = "0440";
text = ''
server_host = ldaps://${config.myEnv.mail.dovecot.ldap.host}:636
search_base = ${config.myEnv.mail.dovecot.ldap.base}
query_filter = ${config.myEnv.mail.dovecot.ldap.postfix_mailbox_filter}
bind_dn = ${config.myEnv.mail.dovecot.ldap.dn}
bind_pw = ${config.myEnv.mail.dovecot.ldap.password}
result_attribute = immaePostfixAddress
result_format = dummy
version = 3
'';
}
{
dest = "postfix/sympa_mailbox_maps";
user = config.services.postfix.user;
group = config.services.postfix.group;
permissions = "0440";
text = ''
hosts = ${config.myEnv.mail.sympa.postgresql.host}
user = ${config.myEnv.mail.sympa.postgresql.user}
password = ${config.myEnv.mail.sympa.postgresql.password}
dbname = ${config.myEnv.mail.sympa.postgresql.database}
query = SELECT DISTINCT 1 FROM list_table WHERE '%s' IN (
CONCAT(name_list, '@', robot_list),
CONCAT(name_list, '-request@', robot_list),
CONCAT(name_list, '-editor@', robot_list),
CONCAT(name_list, '-unsubscribe@', robot_list),
CONCAT(name_list, '-owner@', robot_list),
CONCAT('sympa-request@', robot_list),
CONCAT('sympa-owner@', robot_list),
CONCAT('sympa@', robot_list),
CONCAT('listmaster@', robot_list),
CONCAT('bounce@', robot_list),
CONCAT('abuse-feedback-report@', robot_list)
)
'';
}
{
dest = "postfix/ldap_ejabberd_users_immae_fr";
user = config.services.postfix.user;
group = config.services.postfix.group;
permissions = "0440";
text = ''
server_host = ldaps://${config.myEnv.jabber.ldap.host}:636
search_base = ${config.myEnv.jabber.ldap.base}
query_filter = ${config.myEnv.jabber.postfix_user_filter}
domain = immae.fr
bind_dn = ${config.myEnv.jabber.ldap.dn}
bind_pw = ${config.myEnv.jabber.ldap.password}
result_attribute = immaeXmppUid
result_format = ejabberd@localhost
version = 3
'';
}
];
networking.firewall.allowedTCPPorts = [ 25 ];
users.users."${config.services.postfix.user}".extraGroups = [ "keys" ];
services.filesWatcher.postfix = {
restart = true;
paths = [
config.secrets.fullPaths."postfix/mysql_alias_maps"
config.secrets.fullPaths."postfix/sympa_mailbox_maps"
config.secrets.fullPaths."postfix/ldap_ejabberd_users_immae_fr"
config.secrets.fullPaths."postfix/ldap_mailboxes"
];
};
services.postfix = {
mapFiles = let
recipient_maps = let
name = n: i: "relay_${n}_${toString i}";
pair = n: i: m: lib.attrsets.nameValuePair (name n i) (
if m.type == "hash"
then pkgs.writeText (name n i) m.content
else null
);
pairs = n: v: lib.imap1 (i: m: pair n i m) v.recipient_maps;
in lib.attrsets.filterAttrs (k: v: v != null) (
lib.attrsets.listToAttrs (lib.flatten (
lib.attrsets.mapAttrsToList pairs config.myEnv.mail.postfix.backup_domains
))
);
relay_restrictions = lib.attrsets.filterAttrs (k: v: v != null) (
lib.attrsets.mapAttrs' (n: v:
lib.attrsets.nameValuePair "recipient_access_${n}" (
if lib.attrsets.hasAttr "relay_restrictions" v
then pkgs.writeText "recipient_access_${n}" v.relay_restrictions
else null
)
) config.myEnv.mail.postfix.backup_domains
);
virtual_map = {
virtual = let
cfg = config.myEnv.monitoring.email_check.eldiron;
address = "${cfg.mail_address}@${cfg.mail_domain}";
in pkgs.writeText "postfix-virtual" (
builtins.concatStringsSep "\n" (
["${address} 1"] ++
lib.attrsets.mapAttrsToList (
n: v: lib.optionalString v.external ''
script_${n}@mail.immae.eu 1
''
) config.myEnv.mail.scripts
)
);
};
in
recipient_maps // relay_restrictions // virtual_map;
config = {
### postfix module overrides
readme_directory = "${pkgs.postfix}/share/postfix/doc";
smtp_tls_CAfile = lib.mkForce "";
smtp_tls_cert_file = lib.mkForce "";
smtp_tls_key_file = lib.mkForce "";
message_size_limit = "1073741824"; # Don't put 0 here, it's not equivalent to "unlimited"
mailbox_size_limit = "1073741825"; # Workaround, local delivered mails should all go through scripts
alias_database = "\$alias_maps";
### Relay domains
relay_domains = let
backups = lib.flatten (lib.attrsets.mapAttrsToList (n: v: v.domains or []) config.myEnv.mail.postfix.backup_domains);
virtual_domains = config.myEnv.mail.postfix.additional_mailbox_domains
++ lib.remove null (lib.flatten (map
(zone: map
(e: if e.receive
then "${e.domain}${lib.optionalString (e.domain != "") "."}${zone.name}"
else null
)
(zone.withEmail or [])
)
config.myEnv.dns.masterZones
));
in
backups ++ virtual_domains;
relay_recipient_maps = let
backup_recipients = lib.flatten (lib.attrsets.mapAttrsToList (n: v:
lib.imap1 (i: m: "${m.type}:/etc/postfix/relay_${n}_${toString i}") v.recipient_maps
) config.myEnv.mail.postfix.backup_domains);
virtual_alias_maps = [
"hash:/etc/postfix/virtual"
"mysql:${config.secrets.fullPaths."postfix/mysql_alias_maps"}"
"ldap:${config.secrets.fullPaths."postfix/ldap_ejabberd_users_immae_fr"}"
];
virtual_mailbox_maps = [
"ldap:${config.secrets.fullPaths."postfix/ldap_mailboxes"}"
"pgsql:${config.secrets.fullPaths."postfix/sympa_mailbox_maps"}"
];
in
backup_recipients ++ virtual_alias_maps ++ virtual_mailbox_maps;
smtpd_relay_restrictions = [
"defer_unauth_destination"
] ++ lib.flatten (lib.attrsets.mapAttrsToList (n: v:
if lib.attrsets.hasAttr "relay_restrictions" v
then [ "check_recipient_access hash:/etc/postfix/recipient_access_${n}" ]
else []
) config.myEnv.mail.postfix.backup_domains);
### Additional smtpd configuration
smtpd_tls_received_header = "yes";
smtpd_tls_loglevel = "1";
### Email sending configuration
smtp_tls_security_level = "may";
smtp_tls_loglevel = "1";
### Force ip bind for smtp
smtp_bind_address = config.myEnv.servers."${name}".ips.main.ip4;
smtp_bind_address6 = builtins.head config.myEnv.servers."${name}".ips.main.ip6;
smtpd_milters = [
"unix:${config.myServices.mail.milters.sockets.opendkim}"
"unix:${config.myServices.mail.milters.sockets.openarc}"
"unix:${config.myServices.mail.milters.sockets.opendmarc}"
];
};
enable = true;
enableSmtp = true;
enableSubmission = false;
destination = ["localhost"];
# This needs to reverse DNS
hostname = config.hostEnv.fqdn;
setSendmail = false;
sslCert = "/var/lib/acme/mail/fullchain.pem";
sslKey = "/var/lib/acme/mail/key.pem";
recipientDelimiter = "+";
};
};
}
|
