diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index a57e63d..4b1cf45 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -77,7 +77,7 @@ in
       ''
         # Extra Config
 
-        smtpd_banner = $myhostname ESMTP NO UCE
+        smtpd_banner = ${fqdn} ESMTP NO UCE
         disable_vrfy_command = yes
         message_size_limit = 20971520