diff --git a/nixos/modules/services/mail/mailman.nix b/nixos/modules/services/mail/mailman.nix
index f4d635139fa2..11dd5cb48db0 100644
--- a/nixos/modules/services/mail/mailman.nix
+++ b/nixos/modules/services/mail/mailman.nix
@@ -83,9 +83,14 @@ in {
       etc."mailman.cfg".text = mailmanCfg;
     };
 
-    services.postfix.config = {
-      # Mailman uses recipient delimiters, so we don't need special handling.
-      owner_request_special = "no";
+    services.postfix = {
+      relayDomains = [ "hash:/var/lib/mailman/data/postfix_domains" ];
+      config = {
+        transport_maps = [ "hash:/var/lib/mailman/data/postfix_lmtp" ];
+        local_recipient_maps = [ "hash:/var/lib/mailman/data/postfix_lmtp" ];
+        # Mailman uses recipient delimiters, so we don't need special handling.
+        owner_request_special = "no";
+      };
     };
 
     systemd.services.mailman = {
diff --git a/nixos/modules/services/mail/postfix.nix b/nixos/modules/services/mail/postfix.nix
index bcf907783463..2b08ab1e6aa6 100644
--- a/nixos/modules/services/mail/postfix.nix
+++ b/nixos/modules/services/mail/postfix.nix
@@ -11,10 +11,9 @@ let
 
   haveAliases = cfg.postmasterAlias != "" || cfg.rootAlias != ""
                       || cfg.extraAliases != "";
-  haveTransport = cfg.transport != "" || config.services.mailman.enable;
+  haveTransport = cfg.transport != "";
   haveVirtual = cfg.virtual != "";
-  haveLocalRecipients = cfg.localRecipients != null || config.services.mailman.enable;
-  haveRelayDomains = cfg.relayDomains != null || config.services.mailman.enable;
+  haveLocalRecipients = cfg.localRecipients != null;
 
   clientAccess =
     optional (cfg.dnsBlacklistOverrides != "")
@@ -753,12 +752,12 @@ in
       // optionalAttrs (cfg.domain != "") { mydomain = cfg.domain; }
       // optionalAttrs (cfg.origin != "") { myorigin =  cfg.origin; }
       // optionalAttrs (cfg.destination != null) { mydestination = cfg.destination; }
-      // optionalAttrs haveRelayDomains { relay_domains = optionals (cfg.relayDomains != null) cfg.relayDomains ++ optional config.services.mailman.enable "hash:/var/lib/mailman/data/postfix_domains"; }
+      // optionalAttrs (cfg.relayDomains != null) { relay_domains = cfg.relayDomains; }
       // optionalAttrs (cfg.recipientDelimiter != "") { recipient_delimiter = cfg.recipientDelimiter; }
       // optionalAttrs haveAliases { alias_maps = [ "${cfg.aliasMapType}:/etc/postfix/aliases" ]; }
-      // optionalAttrs haveTransport { transport_maps = [ "hash:/etc/postfix/transport" ] ++ optional config.services.mailman.enable "hash:/var/lib/mailman/data/postfix_lmtp"; }
+      // optionalAttrs haveTransport { transport_maps = [ "hash:/etc/postfix/transport" ]; }
       // optionalAttrs haveVirtual { virtual_alias_maps = [ "${cfg.virtualMapType}:/etc/postfix/virtual" ]; }
-      // optionalAttrs haveLocalRecipients { local_recipient_maps = [ "hash:/etc/postfix/local_recipients" ] ++ optional haveAliases "$alias_maps" ++ optional config.services.mailman.enable "hash:/var/lib/mailman/data/postfix_lmtp"; }
+      // optionalAttrs haveLocalRecipients { local_recipient_maps = [ "hash:/etc/postfix/local_recipients" ] ++ optional haveAliases "$alias_maps"; }
       // optionalAttrs (cfg.dnsBlacklists != []) { smtpd_client_restrictions = clientRestrictions; }
       // optionalAttrs cfg.useSrs {
         sender_canonical_maps = [ "tcp:127.0.0.1:10001" ];