diff --git a/systems/x86_64-linux/sgx/mail.nix b/systems/x86_64-linux/sgx/mail.nix
index a452ec6..e38ebd0 100644
--- a/systems/x86_64-linux/sgx/mail.nix
+++ b/systems/x86_64-linux/sgx/mail.nix
@@ -7,8 +7,7 @@
 
   services.postfix = {
     enable = true;
-    relayHost = "smtp.gmail.com";
-    relayPort = 587;
+    settings.main.relayhost = [ "[smtp.gmail.com]:587" ];
     config = {
       smtp_use_tls = "yes";
       smtp_sasl_auth_enable = "yes";