12 files changed, 132 insertions, 86 deletions

diff --git a/hosts/surtr/default.nix b/hosts/surtr/default.nix
index 9d3101c0..1c66df2b 100644
--- a/hosts/surtr/default.nix
+++ b/hosts/surtr/default.nix
@@ -22,7 +22,6 @@ with lib;
         device = "/dev/vda";
       };
 
-
       tmp.useTmpfs = true;
 
       zfs.devNodes = "/dev"; # /dev/vda2 does not show up in /dev/disk/by-id
@@ -31,7 +30,7 @@ with lib;
       kernelPatches = [
         { name = "zswap-default";
           patch = null;
-          extraStructuredConfig = with lib.kernel; {
+          structuredExtraConfig = with lib.kernel; {
             ZSWAP_DEFAULT_ON = yes;
             ZSWAP_SHRINKER_DEFAULT_ON = yes;
           };
diff --git a/hosts/surtr/dns/zones/email.nights.soa b/hosts/surtr/dns/zones/email.nights.soa
index 913a88d4..34209a99 100644
--- a/hosts/surtr/dns/zones/email.nights.soa
+++ b/hosts/surtr/dns/zones/email.nights.soa
@@ -1,7 +1,7 @@
 $ORIGIN nights.email.
 $TTL 3600
 @ IN SOA ns.yggdrasil.li. hostmaster.yggdrasil.li (
-  2023013000 ; serial
+  2025060700 ; serial
   10800      ; refresh
   3600       ; retry
   604800     ; expire
@@ -27,11 +27,7 @@ $TTL 3600
 
 _acme-challenge         IN      NS      ns.yggdrasil.li.
 
-ymir._domainkey         IN      TXT     ( 
-  "v=DKIM1;k=rsa;p=MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAq3cCKlk+VPhyAanLZTM0BCzUT/+fmxHioZcFk0uJk1akBYj7BRofR7eVNcLKpm3rwYMQgE+9vJH9p8SV6tws9EcWc8SMCqqGZlREYM7PmLDiTSK/vjCzkygfgFCb0EBNsY2A/fpP4rTeoxrbcBSvMkq97iY5rwyw4wXZVZXLiDaCj23s8POoxTk1ClqUJZJQ5x2"
-  "qzrC0RfN5kLZ9A7Gq2jB09vNxpXHYqABA0bJv88JiZM7hfkp9IafJZ+yCVMaBcJs4DAxnTjNAuFD9gm+qSFVY8+yeXqL6Qjo5PbruhyZRBW8RgRYT8t5n07XRglMGKKGMwOGLanrltcyXqB+GsDZBD36RAAwjFadnxdpDyRv4SgRP7ff2tKRrORYpmpN+mKdqw5j3J/nP6bXV1oAkyh9XQkPEIDi81WT87EZziTElDzVp6A2qFOxqucAovoRk24"
-  "7vlsns1FApFRsp9mja0UZNObyKD1M6tP9Ep7lS76tFGMk+WDvXRJH5LEsyCpu7sSyl1r/O0M4K+KldRCqLlZd7rf8F5P8T0dn1azk05g7F4p0N/y9GNdzXbPZ9u0eZdI7SEdh8ZoOZp7NVZiBFfbWLSS5ZtyA2kbBa4i7GJ/cuAbEKOmqAkeQPiu96TGIcyjkXjS6mTPI+9UmKZYZC+OM8XdJ02y5KRoonCc19ZS8CAwEAAQ=="
-)
+ymir._domainkey         IN      CNAME   ymir._domainkey.yggdrasil.li.
 
 _xmpp-client._tcp       IN      SRV     5 0 5222 ymir.yggdrasil.li.
 _xmpp-server._tcp       IN      SRV     5 0 5269 ymir.yggdrasil.li.
diff --git a/hosts/surtr/dns/zones/li.141.soa b/hosts/surtr/dns/zones/li.141.soa
index ab117f09..78d137bb 100644
--- a/hosts/surtr/dns/zones/li.141.soa
+++ b/hosts/surtr/dns/zones/li.141.soa
@@ -1,7 +1,7 @@
 $ORIGIN 141.li.
 $TTL 3600
 @ IN SOA ns.yggdrasil.li. hostmaster.yggdrasil.li (
-  2025020900 ; serial
+  2025060701 ; serial
   10800      ; refresh
   3600       ; retry
   604800     ; expire
@@ -45,11 +45,8 @@ ymir                    IN      AAAA    2a03:4000:6:d004::
 ymir                    IN      MX      0 ymir.yggdrasil.li
 ymir                    IN      TXT     "v=spf1 redirect=ymir.yggdrasil.li"
 
-ymir._domainkey         IN      TXT     ( 
-  "v=DKIM1;k=rsa;p=MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAq3cCKlk+VPhyAanLZTM0BCzUT/+fmxHioZcFk0uJk1akBYj7BRofR7eVNcLKpm3rwYMQgE+9vJH9p8SV6tws9EcWc8SMCqqGZlREYM7PmLDiTSK/vjCzkygfgFCb0EBNsY2A/fpP4rTeoxrbcBSvMkq97iY5rwyw4wXZVZXLiDaCj23s8POoxTk1ClqUJZJQ5x2"
-  "qzrC0RfN5kLZ9A7Gq2jB09vNxpXHYqABA0bJv88JiZM7hfkp9IafJZ+yCVMaBcJs4DAxnTjNAuFD9gm+qSFVY8+yeXqL6Qjo5PbruhyZRBW8RgRYT8t5n07XRglMGKKGMwOGLanrltcyXqB+GsDZBD36RAAwjFadnxdpDyRv4SgRP7ff2tKRrORYpmpN+mKdqw5j3J/nP6bXV1oAkyh9XQkPEIDi81WT87EZziTElDzVp6A2qFOxqucAovoRk24"
-  "7vlsns1FApFRsp9mja0UZNObyKD1M6tP9Ep7lS76tFGMk+WDvXRJH5LEsyCpu7sSyl1r/O0M4K+KldRCqLlZd7rf8F5P8T0dn1azk05g7F4p0N/y9GNdzXbPZ9u0eZdI7SEdh8ZoOZp7NVZiBFfbWLSS5ZtyA2kbBa4i7GJ/cuAbEKOmqAkeQPiu96TGIcyjkXjS6mTPI+9UmKZYZC+OM8XdJ02y5KRoonCc19ZS8CAwEAAQ=="
-)
+ymir._domainkey         IN      CNAME   ymir._domainkey.yggdrasil.li.
+surtr._domainkey        IN      CNAME   surtr._domainkey.yggdrasil.li.
 
 _xmpp-client._tcp       IN      SRV     5 0 5222 ymir.yggdrasil.li.
 _xmpp-server._tcp       IN      SRV     5 0 5269 ymir.yggdrasil.li.
diff --git a/hosts/surtr/dns/zones/li.kleen.soa b/hosts/surtr/dns/zones/li.kleen.soa
index a1c7d35a..5dd3e697 100644
--- a/hosts/surtr/dns/zones/li.kleen.soa
+++ b/hosts/surtr/dns/zones/li.kleen.soa
@@ -1,7 +1,7 @@
 $ORIGIN kleen.li.
 $TTL 3600
 @ IN SOA ns.yggdrasil.li. hostmaster.yggdrasil.li (
-  2023013000 ; serial
+  2025060701 ; serial
   10800      ; refresh
   3600       ; retry
   604800     ; expire
@@ -27,11 +27,8 @@ $TTL 3600
 
 _acme-challenge         IN      NS      ns.yggdrasil.li.
 
-ymir._domainkey         IN      TXT     ( 
-  "v=DKIM1;k=rsa;p=MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAq3cCKlk+VPhyAanLZTM0BCzUT/+fmxHioZcFk0uJk1akBYj7BRofR7eVNcLKpm3rwYMQgE+9vJH9p8SV6tws9EcWc8SMCqqGZlREYM7PmLDiTSK/vjCzkygfgFCb0EBNsY2A/fpP4rTeoxrbcBSvMkq97iY5rwyw4wXZVZXLiDaCj23s8POoxTk1ClqUJZJQ5x2"
-  "qzrC0RfN5kLZ9A7Gq2jB09vNxpXHYqABA0bJv88JiZM7hfkp9IafJZ+yCVMaBcJs4DAxnTjNAuFD9gm+qSFVY8+yeXqL6Qjo5PbruhyZRBW8RgRYT8t5n07XRglMGKKGMwOGLanrltcyXqB+GsDZBD36RAAwjFadnxdpDyRv4SgRP7ff2tKRrORYpmpN+mKdqw5j3J/nP6bXV1oAkyh9XQkPEIDi81WT87EZziTElDzVp6A2qFOxqucAovoRk24"
-  "7vlsns1FApFRsp9mja0UZNObyKD1M6tP9Ep7lS76tFGMk+WDvXRJH5LEsyCpu7sSyl1r/O0M4K+KldRCqLlZd7rf8F5P8T0dn1azk05g7F4p0N/y9GNdzXbPZ9u0eZdI7SEdh8ZoOZp7NVZiBFfbWLSS5ZtyA2kbBa4i7GJ/cuAbEKOmqAkeQPiu96TGIcyjkXjS6mTPI+9UmKZYZC+OM8XdJ02y5KRoonCc19ZS8CAwEAAQ=="
-)
+ymir._domainkey         IN      CNAME   ymir._domainkey.yggdrasil.li.
+surtr._domainkey        IN      CNAME   surtr._domainkey.yggdrasil.li.
 
 _xmpp-client._tcp       IN      SRV     5 0 5222 ymir.yggdrasil.li.
 _xmpp-server._tcp       IN      SRV     5 0 5269 ymir.yggdrasil.li.
diff --git a/hosts/surtr/dns/zones/li.synapse.soa b/hosts/surtr/dns/zones/li.synapse.soa
index 086d4a85..247cf025 100644
--- a/hosts/surtr/dns/zones/li.synapse.soa
+++ b/hosts/surtr/dns/zones/li.synapse.soa
@@ -1,7 +1,7 @@
 $ORIGIN synapse.li.
 $TTL 3600
 @ IN SOA ns.yggdrasil.li. hostmaster.yggdrasil.li (
-  2023092100 ; serial
+  2025060701 ; serial
   10800      ; refresh
   3600       ; retry
   604800     ; expire
diff --git a/hosts/surtr/dns/zones/li.yggdrasil.soa b/hosts/surtr/dns/zones/li.yggdrasil.soa
index ebb298b4..500194ae 100644
--- a/hosts/surtr/dns/zones/li.yggdrasil.soa
+++ b/hosts/surtr/dns/zones/li.yggdrasil.soa
@@ -1,7 +1,7 @@
 $ORIGIN yggdrasil.li.
 $TTL 3600
 @ IN SOA ns.yggdrasil.li. hostmaster.yggdrasil.li (
-  2025052400 ; serial
+  2025060700 ; serial
   10800      ; refresh
   3600       ; retry
   604800     ; expire
@@ -115,6 +115,8 @@ vidhar                  IN      TXT     "v=spf1 redirect=yggdrasil.li"
 
 mailout                 IN      A       188.68.51.254
 mailout                 IN      AAAA    2a03:4000:6:d004::
+mailout                 IN      A       202.61.241.61
+mailout                 IN      AAAA    2a03:4000:52:ada::
 mailout                 IN      MX      0 ymir.yggdrasil.li
 mailout                 IN      TXT     "v=spf1 redirect=yggdrasil.li"
 
diff --git a/hosts/surtr/dns/zones/org.praseodym.soa b/hosts/surtr/dns/zones/org.praseodym.soa
index df505b4c..2b97ca19 100644
--- a/hosts/surtr/dns/zones/org.praseodym.soa
+++ b/hosts/surtr/dns/zones/org.praseodym.soa
@@ -1,7 +1,7 @@
 $ORIGIN praseodym.org.
 $TTL 3600
 @ IN SOA ns.yggdrasil.li. hostmaster.yggdrasil.li (
-  2023013000 ; serial
+  2025060701 ; serial
   10800      ; refresh
   3600       ; retry
   604800     ; expire
@@ -32,11 +32,8 @@ surtr			IN	AAAA	2a03:4000:52:ada::
 surtr                   IN      MX      0 ymir.yggdrasil.li
 surtr                   IN      TXT     "v=spf1 redirect=yggdrasil.li"
 
-ymir._domainkey         IN      TXT     ( 
-  "v=DKIM1;k=rsa;p=MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAq3cCKlk+VPhyAanLZTM0BCzUT/+fmxHioZcFk0uJk1akBYj7BRofR7eVNcLKpm3rwYMQgE+9vJH9p8SV6tws9EcWc8SMCqqGZlREYM7PmLDiTSK/vjCzkygfgFCb0EBNsY2A/fpP4rTeoxrbcBSvMkq97iY5rwyw4wXZVZXLiDaCj23s8POoxTk1ClqUJZJQ5x2"
-  "qzrC0RfN5kLZ9A7Gq2jB09vNxpXHYqABA0bJv88JiZM7hfkp9IafJZ+yCVMaBcJs4DAxnTjNAuFD9gm+qSFVY8+yeXqL6Qjo5PbruhyZRBW8RgRYT8t5n07XRglMGKKGMwOGLanrltcyXqB+GsDZBD36RAAwjFadnxdpDyRv4SgRP7ff2tKRrORYpmpN+mKdqw5j3J/nP6bXV1oAkyh9XQkPEIDi81WT87EZziTElDzVp6A2qFOxqucAovoRk24"
-  "7vlsns1FApFRsp9mja0UZNObyKD1M6tP9Ep7lS76tFGMk+WDvXRJH5LEsyCpu7sSyl1r/O0M4K+KldRCqLlZd7rf8F5P8T0dn1azk05g7F4p0N/y9GNdzXbPZ9u0eZdI7SEdh8ZoOZp7NVZiBFfbWLSS5ZtyA2kbBa4i7GJ/cuAbEKOmqAkeQPiu96TGIcyjkXjS6mTPI+9UmKZYZC+OM8XdJ02y5KRoonCc19ZS8CAwEAAQ=="
-)
+ymir._domainkey         IN      CNAME   ymir._domainkey.yggdrasil.li.
+surtr._domainkey        IN      CNAME   surtr._domainkey.yggdrasil.li.
 
 _xmpp-client._tcp       IN      SRV     5 0 5222 ymir.yggdrasil.li.
 _xmpp-server._tcp       IN      SRV     5 0 5269 ymir.yggdrasil.li.
diff --git a/hosts/surtr/email/ccert-policy-server/ccert_policy_server/__main__.py b/hosts/surtr/email/ccert-policy-server/ccert_policy_server/__main__.py
index 7117eb63..7c931559 100644
--- a/hosts/surtr/email/ccert-policy-server/ccert_policy_server/__main__.py
+++ b/hosts/surtr/email/ccert-policy-server/ccert_policy_server/__main__.py
@@ -28,10 +28,12 @@ class PolicyHandler(StreamRequestHandler):
 
         allowed = False
         user = None
+        relay_eligible = False
         if self.args['sasl_username']:
             user = self.args['sasl_username']
         if self.args['ccert_subject']:
             user = self.args['ccert_subject']
+            relay_eligible = True
 
         if user:
             with self.server.db_pool.connection() as conn:
@@ -44,9 +46,16 @@ class PolicyHandler(StreamRequestHandler):
 
                 with conn.cursor() as cur:
                     cur.row_factory = namedtuple_row
-                    cur.execute('SELECT EXISTS(SELECT true FROM "mailbox" INNER JOIN "mailbox_mapping" ON "mailbox".id = "mailbox_mapping"."mailbox" WHERE "mailbox"."mailbox" = %(user)s AND ("local" = %(local)s OR "local" IS NULL) AND ("extension" = %(extension)s OR "extension" IS NULL) AND "domain" = %(domain)s) as "exists"', params = {'user': user, 'local': local, 'extension': extension if extension is not None else '', 'domain': domain}, prepare=True)
-                    if (row := cur.fetchone()) is not None:
-                        allowed = row.exists
+
+                    if relay_eligible:
+                        cur.execute('SELECT EXISTS(SELECT true FROM "mailbox" INNER JOIN "relay_access" ON "mailbox".id = "relay_access"."mailbox" WHERE "mailbox"."mailbox" = %(user)s AND ("domain" = %(domain)s OR %(domain)s ilike CONCAT(\'%%_.\', "domain"))) as "exists"', params = {'user': user, 'domain': domain})
+                        if (row := cur.fetchone()) is not None:
+                            allowed = row.exists
+
+                    if not allowed:
+                        cur.execute('SELECT EXISTS(SELECT true FROM "mailbox" INNER JOIN "mailbox_mapping" ON "mailbox".id = "mailbox_mapping"."mailbox" WHERE "mailbox"."mailbox" = %(user)s AND ("local" = %(local)s OR "local" IS NULL) AND ("extension" = %(extension)s OR "extension" IS NULL) AND "domain" = %(domain)s) as "exists"', params = {'user': user, 'local': local, 'extension': extension if extension is not None else '', 'domain': domain}, prepare=True)
+                        if (row := cur.fetchone()) is not None:
+                            allowed = row.exists
 
         action = '550 5.7.0 Sender address not authorized for current user'
         if allowed:
diff --git a/hosts/surtr/email/default.nix b/hosts/surtr/email/default.nix
index c6253e4c..a3e06ca6 100644
--- a/hosts/surtr/email/default.nix
+++ b/hosts/surtr/email/default.nix
@@ -124,19 +124,20 @@ in {
     services.postfix = {
       enable = true;
       enableSmtp = false;
-      hostname = "surtr.yggdrasil.li";
-      recipientDelimiter = "";
       setSendmail = true;
       postmasterAlias = ""; rootAlias = ""; extraAliases = "";
-      destination = [];
-      sslCert = "/run/credentials/postfix.service/surtr.yggdrasil.li.pem";
-      sslKey = "/run/credentials/postfix.service/surtr.yggdrasil.li.key.pem";
-      networks = [];
-      config = let
-        relay_ccert = "texthash:${pkgs.writeText "relay_ccert" ""}";
-      in {
+      settings.main = {
+        recpipient_delimiter = "";
+        mydestination = [];
+        mynetworks = [];
+        myhostname = "surtr.yggdrasil.li";
+
         smtpd_tls_security_level = "may";
 
+        smtpd_tls_chain_files = [
+          "/run/credentials/postfix.service/surtr.yggdrasil.li.full.pem"
+        ];
+
         #the dh params
         smtpd_tls_dh1024_param_file = toString config.security.dhparams.params."postfix-1024".path;
         smtpd_tls_dh512_param_file = toString config.security.dhparams.params."postfix-512".path;
@@ -171,21 +172,14 @@ in {
 
         smtp_tls_connection_reuse = true;
 
-        tls_server_sni_maps = ''texthash:${pkgs.writeText "sni" (
-          concatMapStringsSep "\n\n" (domain:
-            concatMapStringsSep "\n" (subdomain: "${subdomain} /run/credentials/postfix.service/${removePrefix "." subdomain}.full.pem")
-              [domain "mailin.${domain}" "mailsub.${domain}" ".${domain}"]
-          ) emailDomains
-        )}'';
+        tls_server_sni_maps = "inline:{${concatMapStringsSep ", " (domain: "{ ${domain} = /run/credentials/postfix.service/${removePrefix "." domain}.full.pem }") (concatMap (domain: [domain "mailin.${domain}" "mailsub.${domain}" ".${domain}"]) emailDomains)}}";
 
         smtp_tls_policy_maps = "socketmap:unix:${config.services.postfix-mta-sts-resolver.settings.path}:postfix";
 
         local_recipient_maps = "";
 
-        # 10 GiB
-        message_size_limit = "10737418240";
-        # 10 GiB
-        mailbox_size_limit = "10737418240";
+        message_size_limit = 10 * 1024 * 1024 * 1024;
+        mailbox_size_limit = 10 * 1024 * 1024 * 1024;
 
         smtpd_delay_reject = true;
         smtpd_helo_required = true;
@@ -200,7 +194,6 @@ in {
             dbname = email
             query = SELECT action FROM virtual_mailbox_access WHERE lookup = '%s'
           ''}"
-          "check_ccert_access ${relay_ccert}"
           "reject_non_fqdn_helo_hostname"
           "reject_invalid_helo_hostname"
           "reject_unauth_destination"
@@ -221,7 +214,6 @@ in {
         address_verify_sender_ttl = "30045s";
 
         smtpd_relay_restrictions = [
-          "check_ccert_access ${relay_ccert}"
           "reject_unauth_destination"
         ];
 
@@ -268,13 +260,26 @@ in {
         virtual_transport = "dvlmtp:unix:/run/dovecot-lmtp";
         smtputf8_enable = false;
 
-        authorized_submit_users = "inline:{ root= postfwd= dovecot2= }";
+        authorized_submit_users = "inline:{ root= postfwd= ${config.services.dovecot2.user}= }";
+        authorized_flush_users = "inline:{ root= }";
+        authorized_mailq_users = "inline:{ root= }";
 
         postscreen_access_list = "";
         postscreen_denylist_action = "drop";
         postscreen_greet_action = "enforce";
+
+        sender_bcc_maps = ''pgsql:${pkgs.writeText "sender_bcc_maps.cf" ''
+          hosts = postgresql:///email
+          dbname = email
+          query = SELECT value FROM sender_bcc_maps WHERE key = '%s'
+        ''}'';
+        recipient_bcc_maps = ''pgsql:${pkgs.writeText "recipient_bcc_maps.cf" ''
+          hosts = postgresql:///email
+          dbname = email
+          query = SELECT value FROM recipient_bcc_maps WHERE key = '%s'
+        ''}'';
       };
-      masterConfig = {
+      settings.master = {
         "465" = {
           type = "inet";
           private = false;
@@ -342,7 +347,10 @@ in {
           maxproc = 0;
           args = [
             "-o" "header_checks=pcre:${pkgs.writeText "header_checks_submission" ''
+              if /^Received: /
+              !/by surtr\.yggdrasil\.li/ STRIP
               /^Received: from [^ ]+ \([^ ]+ [^ ]+\)\s+(.*)$/ REPLACE Received: $1
+              endif
             ''}"
           ];
         };
@@ -390,7 +398,7 @@ in {
       enable = true;
       user = "postfix"; group = "postfix";
       socket = "local:/run/opendkim/opendkim.sock";
-      domains = ''csl:${concatStringsSep "," (["surtr.yggdrasil.li"] ++ emailDomains)}'';
+      domains = ''csl:${concatStringsSep "," (["surtr.yggdrasil.li" "yggdrasil.li" "141.li" "kleen.li" "synapse.li" "praseodym.org"] ++ emailDomains)}'';
       selector = "surtr";
       configFile = builtins.toFile "opendkim.conf" ''
         Syslog true
@@ -494,7 +502,7 @@ in {
       };
     };
 
-    users.groups.${config.services.rspamd.group}.members = [ config.services.postfix.user "dovecot2" ];
+    users.groups.${config.services.rspamd.group}.members = [ config.services.postfix.user config.services.dovecot2.user ];
 
     services.redis.servers.rspamd.enable = true;
 
@@ -504,22 +512,22 @@ in {
     services.dovecot2 = {
       enable = true;
       enablePAM = false;
-      sslServerCert = "/run/credentials/dovecot2.service/surtr.yggdrasil.li.pem";
-      sslServerKey = "/run/credentials/dovecot2.service/surtr.yggdrasil.li.key.pem";
+      sslServerCert = "/run/credentials/dovecot.service/surtr.yggdrasil.li.pem";
+      sslServerKey = "/run/credentials/dovecot.service/surtr.yggdrasil.li.key.pem";
       sslCACert = toString ./ca/ca.crt;
       mailLocation = "maildir:/var/lib/mail/%u/maildir:UTF-8:INDEX=/var/lib/dovecot/indices/%u";
       mailPlugins.globally.enable = [ "fts" "fts_xapian" ];
       protocols = [ "lmtp" "sieve" ];
       sieve = {
-        extensions = ["copy" "imapsieve" "variables" "imap4flags" "vacation"];
-        globalExtensions = ["copy" "imapsieve" "variables" "imap4flags" "vacation"];
+        extensions = ["copy" "imapsieve" "variables" "imap4flags" "vacation" "vacation-seconds" "vnd.dovecot.debug"];
+        globalExtensions = ["copy" "imapsieve" "variables" "imap4flags" "vacation" "vacation-seconds" "vnd.dovecot.debug"];
       };
       extraConfig = let
         dovecotSqlConf = pkgs.writeText "dovecot-sql.conf" ''
           driver = pgsql
           connect = dbname=email
-          password_query = SELECT (CASE WHEN '%k' = 'valid' AND '%m' = 'EXTERNAL' THEN NULL ELSE "password" END) as password, (CASE WHEN '%k' = 'valid' AND '%m' = 'EXTERNAL' THEN true WHEN password IS NULL THEN true ELSE NULL END) as nopassword, "user", quota_rule, 'dovecot2' as uid, 'dovecot2' as gid FROM imap_user WHERE "user" = '%n'
-          user_query = SELECT "user", quota_rule, 'dovecot2' as uid, 'dovecot2' as gid FROM imap_user WHERE "user" = '%n'
+          password_query = SELECT (CASE WHEN '%k' = 'valid' AND '%m' = 'EXTERNAL' THEN NULL ELSE "password" END) as password, (CASE WHEN '%k' = 'valid' AND '%m' = 'EXTERNAL' THEN true WHEN password IS NULL THEN true ELSE NULL END) as nopassword, "user", quota_rule, '${config.services.dovecot2.user}' as uid, '${config.services.dovecot2.group}' as gid FROM imap_user WHERE "user" = '%n'
+          user_query = SELECT "user", quota_rule, '${config.services.dovecot2.user}' as uid, 'dovecot2' as gid FROM imap_user WHERE "user" = '%n'
           iterate_query = SELECT "user" FROM imap_user
         '';
       in ''
@@ -527,16 +535,16 @@ in {
 
         mail_plugins = $mail_plugins quota
 
-        first_valid_uid = ${toString config.users.users.dovecot2.uid}
-        last_valid_uid = ${toString config.users.users.dovecot2.uid}
-        first_valid_gid = ${toString config.users.groups.dovecot2.gid}
-        last_valid_gid = ${toString config.users.groups.dovecot2.gid}
+        first_valid_uid = ${toString config.users.users.${config.services.dovecot2.user}.uid}
+        last_valid_uid = ${toString config.users.users.${config.services.dovecot2.user}.uid}
+        first_valid_gid = ${toString config.users.groups.${config.services.dovecot2.group}.gid}
+        last_valid_gid = ${toString config.users.groups.${config.services.dovecot2.group}.gid}
 
         ${concatMapStringsSep "\n\n" (domain:
           concatMapStringsSep "\n" (subdomain: ''
             local_name ${subdomain} {
-              ssl_cert = </run/credentials/dovecot2.service/${subdomain}.pem
-              ssl_key = </run/credentials/dovecot2.service/${subdomain}.key.pem
+              ssl_cert = </run/credentials/dovecot.service/${subdomain}.pem
+              ssl_key = </run/credentials/dovecot.service/${subdomain}.key.pem
             }
           '') ["imap.${domain}" domain]
         ) emailDomains}
@@ -557,10 +565,10 @@ in {
         auth_debug = yes
 
         service auth {
-          user = dovecot2
+          user = ${config.services.dovecot2.user}
         }
         service auth-worker {
-          user = dovecot2
+          user = ${config.services.dovecot2.user}
         }
 
         userdb {
@@ -581,7 +589,7 @@ in {
             args = ${pkgs.writeText "dovecot-sql.conf" ''
               driver = pgsql
               connect = dbname=email
-              user_query = SELECT DISTINCT ON (extension IS NULL, local IS NULL) "user", quota_rule, 'dovecot2' as uid, 'dovecot2' as gid FROM lmtp_mapping WHERE CASE WHEN extension IS NOT NULL AND local IS NOT NULL THEN ('%n' :: citext) = local || '+' || extension AND domain = ('%d' :: citext) WHEN local IS NOT NULL THEN (local = ('%n' :: citext) OR ('%n' :: citext) ILIKE local || '+%%') AND domain = ('%d' :: citext) WHEN extension IS NOT NULL THEN ('%n' :: citext) ILIKE '%%+' || extension AND domain = ('%d' :: citext) ELSE domain = ('%d' :: citext) END ORDER BY (extension IS NULL) ASC, (local IS NULL) ASC
+              user_query = SELECT DISTINCT ON (extension IS NULL, local IS NULL) "user", quota_rule, '${config.services.dovecot2.user}' as uid, '${config.services.dovecot2.group}' as gid FROM lmtp_mapping WHERE CASE WHEN extension IS NOT NULL AND local IS NOT NULL THEN ('%n' :: citext) = local || '+' || extension AND domain = ('%d' :: citext) WHEN local IS NOT NULL THEN (local = ('%n' :: citext) OR ('%n' :: citext) ILIKE local || '+%%') AND domain = ('%d' :: citext) WHEN extension IS NOT NULL THEN ('%n' :: citext) ILIKE '%%+' || extension AND domain = ('%d' :: citext) ELSE domain = ('%d' :: citext) END ORDER BY (extension IS NULL) ASC, (local IS NULL) ASC
             ''}
 
             skip = never
@@ -651,7 +659,7 @@ in {
           quota_status_success = DUNNO
           quota_status_nouser = DUNNO
           quota_grace = 10%%
-          quota_max_mail_size = ${config.services.postfix.config.message_size_limit}
+          quota_max_mail_size = ${toString config.services.postfix.settings.main.message_size_limit}
           quota_vsizes = yes
         }
 
@@ -704,8 +712,8 @@ in {
 
     systemd.services.dovecot-fts-xapian-optimize = {
       description = "Optimize dovecot indices for fts_xapian";
-      requisite = [ "dovecot2.service" ];
-      after = [ "dovecot2.service" ];
+      requisite = [ "dovecot.service" ];
+      after = [ "dovecot.service" ];
       startAt = "*-*-* 22:00:00 Europe/Berlin";
       serviceConfig = {
         Type = "oneshot";
@@ -770,28 +778,26 @@ in {
 
     security.acme.rfc2136Domains = {
       "surtr.yggdrasil.li" = {
-        restartUnits = [ "postfix.service" "dovecot2.service" ];
+        restartUnits = [ "postfix.service" "dovecot.service" ];
       };
     } // listToAttrs (map (domain: nameValuePair "spm.${domain}" { restartUnits = ["nginx.service"]; }) spmDomains)
     // listToAttrs (concatMap (domain: [
-      (nameValuePair domain { restartUnits = ["postfix.service" "dovecot2.service"]; })
+      (nameValuePair domain { restartUnits = ["postfix.service" "dovecot.service"]; })
       (nameValuePair "mailin.${domain}" { restartUnits = ["postfix.service"]; })
       (nameValuePair "mailsub.${domain}" { restartUnits = ["postfix.service"]; })
-      (nameValuePair "imap.${domain}" { restartUnits = ["dovecot2.service"]; })
+      (nameValuePair "imap.${domain}" { restartUnits = ["dovecot.service"]; })
       (nameValuePair "mta-sts.${domain}" { restartUnits = ["nginx.service"]; })
     ]) emailDomains);
 
     systemd.services.postfix = {
-      serviceConfig.LoadCredential = [
-        "surtr.yggdrasil.li.key.pem:${config.security.acme.certs."surtr.yggdrasil.li".directory}/key.pem"
-        "surtr.yggdrasil.li.pem:${config.security.acme.certs."surtr.yggdrasil.li".directory}/fullchain.pem"
-      ] ++ concatMap (domain:
-        map (subdomain: "${subdomain}.full.pem:${config.security.acme.certs.${subdomain}.directory}/full.pem")
-          [domain "mailin.${domain}" "mailsub.${domain}"]
-      ) emailDomains;
+      serviceConfig.LoadCredential = let
+        tlsCredential = domain: "${domain}.full.pem:${config.security.acme.certs.${domain}.directory}/full.pem";
+      in [
+        (tlsCredential "surtr.yggdrasil.li")
+      ] ++ concatMap (domain: map tlsCredential [domain "mailin.${domain}" "mailsub.${domain}"]) emailDomains;
     };
 
-    systemd.services.dovecot2 = {
+    systemd.services.dovecot = {
       preStart = ''
         for f in /etc/dovecot/sieve_flag.d/*.sieve /etc/dovecot/sieve_before.d/*.sieve; do
           ${getExe' pkgs.dovecot_pigeonhole "sievec"} $f
diff --git a/hosts/surtr/kimai.nix b/hosts/surtr/kimai.nix
index a3712bb2..454b3d80 100644
--- a/hosts/surtr/kimai.nix
+++ b/hosts/surtr/kimai.nix
@@ -47,6 +47,8 @@
               client_max_body_size 0;
               proxy_request_buffering off;
               proxy_buffering off;
+
+              proxy_read_timeout 300;
             '';
           };
         };
diff --git a/hosts/surtr/postgresql/default.nix b/hosts/surtr/postgresql/default.nix
index 0ae29058..3786ea7c 100644
--- a/hosts/surtr/postgresql/default.nix
+++ b/hosts/surtr/postgresql/default.nix
@@ -297,6 +297,47 @@ in {
 
           COMMIT;
 
+          BEGIN;
+          SELECT _v.register_patch('014-relay', ARRAY['000-base'], null);
+
+          CREATE TABLE relay_access (
+            id uuid PRIMARY KEY NOT NULL DEFAULT gen_random_uuid(),
+            mailbox uuid REFERENCES mailbox(id),
+            domain citext NOT NULL CONSTRAINT domain_non_empty CHECK (domain <> ''')
+          );
+
+          COMMIT;
+
+          BEGIN;
+          SELECT _v.register_patch('015-relay-unique', ARRAY['000-base', '014-relay'], null);
+
+          CREATE UNIQUE INDEX relay_unique ON relay_access (mailbox, domain);
+
+          COMMIT;
+
+          BEGIN;
+          SELECT _v.register_patch('015-sender_bcc', null, null);
+
+          CREATE TABLE sender_bcc_maps (
+            id uuid PRIMARY KEY NOT NULL DEFAULT gen_random_uuid(),
+            key text NOT NULL CONSTRAINT key_not_empty CHECK (key <> '''),
+            value text NOT NULL CONSTRAINT value_not_empty CHECK (value <> '''),
+            CONSTRAINT key_unique UNIQUE (key)
+          );
+
+          COMMIT;
+
+          BEGIN;
+          SELECT _v.register_patch('016-recipient_bcc', null, null);
+
+          CREATE TABLE recipient_bcc_maps (
+            id uuid PRIMARY KEY NOT NULL DEFAULT gen_random_uuid(),
+            key text NOT NULL CONSTRAINT key_not_empty CHECK (key <> '''),
+            value text NOT NULL CONSTRAINT value_not_empty CHECK (value <> '''),
+            CONSTRAINT recipient_bcc_maps_key_unique UNIQUE (key)
+          );
+
+          COMMIT;
         ''}
 
         psql etebase postgres -eXf ${pkgs.writeText "etebase.sql" ''
diff --git a/hosts/surtr/tls/default.nix b/hosts/surtr/tls/default.nix
index b1c05888..b25bd2ea 100644
--- a/hosts/surtr/tls/default.nix
+++ b/hosts/surtr/tls/default.nix
@@ -41,7 +41,7 @@ in {
 
       acceptTerms = true;
       # DNS challenge is slow
-      preliminarySelfsigned = true;
+      # preliminarySelfsigned = true;
       defaults = {
         email = "phikeebaogobaegh@141.li";
         # We don't like NIST curves and Let's Encrypt doesn't support