diff --git a/nixosModules/stalwart.nix b/nixosModules/stalwart.nix
index ab72190..8cebed2 100644
--- a/nixosModules/stalwart.nix
+++ b/nixosModules/stalwart.nix
@@ -76,8 +76,8 @@
           listener = {
             smtp = {
               protocol = "smtp";
-              bind = "0.0.0.0:25,[::]:25";
-              # bind = ["0.0.0.0:25" "[::]:25"];
+              # bind = "0.0.0.0:25,[::]:25";
+              bind = ["0.0.0.0:25" "[::]:25"];
             };
             submissions = {
               bind = "[::]:465";