feat: Add email options

sp-modules/simple-nixos-mailserver/config.nix

@@ -17,6 +17,14 @@ let
     mailserver-service-account-token-name = "mailserver-service-account-token";
     mailserver-service-account-token-fp = "/run/keys/${group}/kanidm-service-account-token"; # FIXME sync with auth module
   };
+
+  modulesConfig = builtins.mapAttrs (
+    _: value: {
+      inherit (value) hashedPasswordFile sendOnly;
+    }
+  ) config.sp.email;
+  extraDomains = lib.mapAttrsToList (_: value: value.subdomain) config.sp.email;
+  extraTargets = lib.mapAttrsToList (_: value: value.systemdTargets) config.sp.email;
 in
 lib.mkIf sp.modules.simple-nixos-mailserver.enable (
   lib.mkMerge [
@@ -62,7 +70,7 @@ lib.mkIf sp.modules.simple-nixos-mailserver.enable (
       mailserver = {
         enable = true;
         fqdn = sp.domain;
-        domains = [ sp.domain ];
+        domains = [ sp.domain ] ++ extraDomains;
         localDnsResolver = false;
 
         # A list of all login accounts. To create the password hashes, use
@@ -97,6 +105,7 @@ lib.mkIf sp.modules.simple-nixos-mailserver.enable (
               };
             }) sp.users
           )
+          // modulesConfig
         );
 
         extraVirtualAliases = {
@@ -128,6 +137,9 @@ lib.mkIf sp.modules.simple-nixos-mailserver.enable (
           postfix.serviceConfig.Slice = "simple_nixos_mailserver.slice";
           rspamd.serviceConfig.Slice = "simple_nixos_mailserver.slice";
           redis-rspamd.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+
+          dovecot.wants = extraTargets;
+          dovecot2.wants = extraTargets;
         };
         slices."simple_nixos_mailserver" = {
           name = "simple_nixos_mailserver.slice";
@@ -139,7 +151,7 @@ lib.mkIf sp.modules.simple-nixos-mailserver.enable (
     (lib.mkIf is-auth-enabled {
       mailserver = {
         extraVirtualAliases = lib.mkForce { };
-        loginAccounts = lib.mkForce { };
+        loginAccounts = lib.mkForce modulesConfig;
         # LDAP is needed for Postfix to query Kanidm about email address ownership.
         # LDAP is needed for Dovecot also.
         ldap = {