diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index 4b1cf45..a2ec9ef 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -76,6 +76,7 @@ in
       extraConfig =
       ''
         # Extra Config
+        mydestination = localhost
 
         smtpd_banner = ${fqdn} ESMTP NO UCE
         disable_vrfy_command = yes