diff --git a/hosts/iron/services/mail.nix b/hosts/iron/services/mail.nix
index fbe802e..c5d855e 100644
--- a/hosts/iron/services/mail.nix
+++ b/hosts/iron/services/mail.nix
@@ -29,7 +29,7 @@ in
       smtp_bind_address = "159.69.103.126";
       smtp_bind_address_enforce = true;
     };
-    masterConfig.smtp_inet.args = [
+    masterConfig.smtp.args = [
       "-o"
       "inet_protocols=ipv4"
     ];