diff --git a/modules/email/default.nix b/modules/email/default.nix
index f00a853..f50c96a 100644
--- a/modules/email/default.nix
+++ b/modules/email/default.nix
@@ -26,6 +26,12 @@ in
 
     users.users."stalwart-mail".extraGroups = ["nginx"];
 
+    networking.firewall.allowedTCPPorts = [
+      cfg.ports.imaps
+      cfg.ports.smtps
+      cfg.ports.smtp
+    ];
+
     services.stalwart-mail = {
       enable = true;
       openFirewall = true;