diff --git a/module.nix b/module.nix
index 95b86dd..04cab13 100644
--- a/module.nix
+++ b/module.nix
@@ -104,7 +104,7 @@ in
     # mailserver.loginAccounts."noreply.mastodon@${sp.domain}" = {
     # mailserver.loginAccounts."mastodon@${sp.domain}" = {
     selfprivacy.email."noreply@${cfg.subdomain}.${sp.domain}" = {
-      domain = "${cfg.subdomain}.${sp.domain}";
+      subdomain = cfg.subdomain;
       hashedPasswordFile = "/run/postfix/mastodon.cf";
       systemdTargets = [ "mastodon-email-password-setup.service" ];
       sendOnly = false; # TODO