- (zone.withEmail or [])
- )
- myconfig.env.dns.masterZones
- )));
- virtual_mailbox_maps = "mysql:${config.secrets.fullPaths."postfix/mysql_mailbox_maps"}";
- dovecot_destination_recipient_limit = "1";
- virtual_transport = "dovecot";
-
- ### Relay domains
- relay_domains = lib.flatten (lib.attrsets.mapAttrsToList (n: v: v.domains or []) myconfig.env.mail.postfix.backup_domains);
- relay_recipient_maps = lib.flatten (lib.attrsets.mapAttrsToList (n: v:
- lib.imap1 (i: m: "${m.type}:/etc/postfix/relay_${n}_${toString i}") v.recipient_maps
- ) myconfig.env.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 = myconfig.env.servers.eldiron.ips.main.ip4;
- smtp_bind_address6 = builtins.head myconfig.env.servers.eldiron.ips.main.ip6;
-
- # #Unneeded if postfix can only send e-mail from "self" domains
- # #smtp_sasl_auth_enable = "yes";
- # #smtp_sasl_password_maps = "hash:/etc/postfix/relay_creds";
- # #smtp_sasl_security_options = "noanonymous";
- # #smtp_sender_dependent_authentication = "yes";
- # #sender_dependent_relayhost_maps = "hash:/etc/postfix/sender_relay";
-
- ### opendkim, opendmarc, openarc milters
- non_smtpd_milters = [
- "unix:${config.myServices.mail.milters.sockets.opendkim}"
- "unix:${config.myServices.mail.milters.sockets.opendmarc}"
- "unix:${config.myServices.mail.milters.sockets.openarc}"
- ];
- smtpd_milters = [
- "unix:${config.myServices.mail.milters.sockets.opendkim}"
- "unix:${config.myServices.mail.milters.sockets.opendmarc}"
- "unix:${config.myServices.mail.milters.sockets.openarc}"
- ];
+ ) 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" (
+ ["${address} testmail@localhost"] ++
+ lib.attrsets.mapAttrsToList (
+ n: v: lib.optionalString v.external ''
+ script_${n}@mail.immae.eu ${n}@localhost, scripts@mail.immae.eu
+ ''
+ ) config.myEnv.mail.scripts
+ )
+ );
+ };
+ sasl_access = {
+ host_sender_login = with lib.attrsets; let
+ addresses = zipAttrs (lib.flatten (mapAttrsToList
+ (n: v: (map (e: { "${e}" = "${n}@immae.eu"; }) v.emails)) config.myEnv.servers));
+ joined = builtins.concatStringsSep ",";
+ in pkgs.writeText "host-sender-login"
+ (builtins.concatStringsSep "\n" (mapAttrsToList (n: v: "${n} ${joined v}") addresses));
+ host_dummy_mailboxes = pkgs.writeText "host-virtual-mailbox"
+ (builtins.concatStringsSep "\n" (["immae-eu@immae.eu dummy"] ++ lib.attrsets.mapAttrsToList (n: v: "${n}@immae.eu dummy") nodes));
+ };
+ in
+ recipient_maps // relay_restrictions // virtual_map // sasl_access;
+ config = {
+ ### postfix module overrides
+ readme_directory = "${pkgs.postfix}/share/postfix/doc";
+ smtp_tls_CAfile = lib.mkForce "";
+ smtp_tls_cert_file = lib.mkForce "";
+ smtp_tls_key_file = lib.mkForce "";
+
+ message_size_limit = "1073741824"; # Don't put 0 here, it's not equivalent to "unlimited"
+ mailbox_size_limit = "1073741825"; # Workaround, local delivered mails should all go through scripts
+ alias_database = "\$alias_maps";
+
+ ### Virtual mailboxes config
+ virtual_alias_maps = "hash:/etc/postfix/virtual mysql:${config.secrets.fullPaths."postfix/mysql_alias_maps"} ldap:${config.secrets.fullPaths."postfix/ldap_ejabberd_users_immae_fr"}";
+ virtual_mailbox_domains = config.myEnv.mail.postfix.additional_mailbox_domains
+ ++ lib.remove null (lib.flatten (map
+ (zone: map
+ (e: if e.receive
+ then "${e.domain}${lib.optionalString (e.domain != "") "."}${zone.name}"
+ else null
+ )
+ (zone.withEmail or [])
+ )
+ config.myEnv.dns.masterZones
+ ));
+ virtual_mailbox_maps = "hash:/etc/postfix/host_dummy_mailboxes mysql:${config.secrets.fullPaths."postfix/mysql_mailbox_maps"}";
+ dovecot_destination_recipient_limit = "1";
+ virtual_transport = "dovecot";
+
+ ### Relay domains
+ relay_domains = lib.flatten (lib.attrsets.mapAttrsToList (n: v: v.domains or []) config.myEnv.mail.postfix.backup_domains);
+ relay_recipient_maps = lib.flatten (lib.attrsets.mapAttrsToList (n: v:
+ lib.imap1 (i: m: "${m.type}:/etc/postfix/relay_${n}_${toString i}") v.recipient_maps
+ ) config.myEnv.mail.postfix.backup_domains);
+ 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_${n}" ]
+ else []
+ ) config.myEnv.mail.postfix.backup_domains);
+
+ ### Additional smtpd configuration
+ smtpd_tls_received_header = "yes";
+ smtpd_tls_loglevel = "1";
+
+ ### Email sending configuration
+ smtp_tls_security_level = "may";
+ smtp_tls_loglevel = "1";
+
+ ### Force ip bind for smtp
+ smtp_bind_address = config.hostEnv.ips.main.ip4;
+ smtp_bind_address6 = builtins.head config.hostEnv.ips.main.ip6;
+
+ # Use some relays when authorized senders are not myself
+ smtp_sasl_mechanism_filter = "plain,login"; # GSSAPI Not correctly supported by postfix
+ smtp_sasl_auth_enable = "yes";
+ smtp_sasl_password_maps =
+ "mysql:${config.secrets.fullPaths."postfix/mysql_sender_relays_creds"}";
+ smtp_sasl_security_options = "noanonymous";
+ smtp_sender_dependent_authentication = "yes";
+ sender_dependent_relayhost_maps =
+ "mysql:${config.secrets.fullPaths."postfix/mysql_sender_relays_hosts"}";
+
+ ### opendkim, opendmarc, openarc milters
+ non_smtpd_milters = [
+ "unix:${config.myServices.mail.milters.sockets.opendkim}"
+ ];
+ smtpd_milters = [
+ "unix:${config.myServices.mail.milters.sockets.opendkim}"
+ "unix:${config.myServices.mail.milters.sockets.openarc}"
+ "unix:${config.myServices.mail.milters.sockets.opendmarc}"
+ ];
+
+ smtp_use_tls = true;
+ smtpd_use_tls = true;
+ smtpd_tls_chain_files = builtins.concatStringsSep "," [ "/var/lib/acme/mail/full.pem" "/var/lib/acme/mail-rsa/full.pem" ];
+
+ maximal_queue_lifetime = "6w";
+ bounce_queue_lifetime = "6w";
+ };
+ enable = true;
+ enableSmtp = true;
+ enableSubmission = true;
+ submissionOptions = {
+ # Don’t use "long form", only commas (cf
+ # http://www.postfix.org/master.5.html long form is not handled
+ # well by the submission function)
+ smtpd_tls_security_level = "encrypt";
+ smtpd_sasl_auth_enable = "yes";
+ smtpd_tls_auth_only = "yes";
+ smtpd_sasl_tls_security_options = "noanonymous";
+ smtpd_sasl_type = "dovecot";
+ smtpd_sasl_path = "private/auth";
+ smtpd_reject_unlisted_recipient = "no";
+ smtpd_client_restrictions = "permit_sasl_authenticated,reject";
+ smtpd_relay_restrictions = "permit_sasl_authenticated,reject";
+ # Refuse to send e-mails with a From that is not handled
+ smtpd_sender_restrictions =
+ "reject_sender_login_mismatch,reject_unlisted_sender,permit_sasl_authenticated,reject";
+ smtpd_sender_login_maps = builtins.concatStringsSep "," [
+ "hash:/etc/postfix/host_sender_login"
+ "mysql:${config.secrets.fullPaths."postfix/mysql_sender_relays_maps"}"
+ "mysql:${config.secrets.fullPaths."postfix/mysql_sender_login_maps"}"
+ ];
+ smtpd_recipient_restrictions = "permit_sasl_authenticated,reject";
+ milter_macro_daemon_name = "ORIGINATING";
+ smtpd_milters = builtins.concatStringsSep "," [
+ # FIXME: put it back when opensmtpd is upgraded and able to
+ # rewrite the from header
+ #"unix:/run/milter_verify_from/verify_from.sock"
+ "unix:${config.myServices.mail.milters.sockets.opendkim}"
+ ];
+ };
+ destination = ["localhost"];
+ # This needs to reverse DNS
+ hostname = config.hostEnv.fqdn;
+ setSendmail = true;
+ recipientDelimiter = "+";
+ masterConfig = {
+ submissions = {
+ type = "inet";
+ private = false;
+ command = "smtpd";
+ args = ["-o" "smtpd_tls_wrappermode=yes" ] ++ (let
+ mkKeyVal = opt: val: [ "-o" (opt + "=" + val) ];
+ in lib.concatLists (lib.mapAttrsToList mkKeyVal config.services.postfix.submissionOptions)
+ );
+ };
+ dovecot = {
+ type = "unix";
+ privileged = true;
+ chroot = false;
+ command = "pipe";
+ args = let
+ # rspamd could be used as a milter, but then it cannot apply
+ # its checks "per user" (milter is not yet dispatched to
+ # users), so we wrap dovecot-lda inside rspamc per recipient
+ # here.
+ rspamc_dovecot = pkgs.writeScriptBin "rspamc_dovecot" ''
+ #! ${pkgs.stdenv.shell}
+ sender="$1"
+ original_recipient="$2"
+ user="$3"
+
+ ${pkgs.coreutils}/bin/cat - | \
+ (${pkgs.rspamd}/bin/rspamc -h ${config.myServices.mail.rspamd.sockets.worker-controller} -c bayes -d "$user" --mime || true) | \
+ ${pkgs.dovecot}/libexec/dovecot/dovecot-lda -f "$sender" -a "$original_recipient" -d "$user"
+ '';
+ in [
+ "flags=DRhu" "user=vhost:vhost"
+ "argv=${rspamc_dovecot}/bin/rspamc_dovecot \${sender} \${original_recipient} \${user}@\${nexthop}"
+ ];
+ };
+ };