diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index 680077d..8124a6a 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -248,8 +248,6 @@ in
 
     services.postfix = {
       enable = true;
-      hostname = "${cfg.sendingFqdn}";
-      networksStyle = "host";
       mapFiles."valias" = valiases_file;
       mapFiles."regex_valias" = regex_valiases_file;
       mapFiles."vaccounts" = vaccounts_file;
@@ -271,8 +269,8 @@ in
           "${certificatePath}"
         ];
 
-        # Extra Config
-        mydestination = "";
+        myhostname = cfg.sendingFqdn;
+        mydestination = ""; # disable local mail delivery
         recipient_delimiter = cfg.recipientDelimiter;
         smtpd_banner = "${cfg.fqdn} ESMTP NO UCE";
         disable_vrfy_command = true;