diff --git a/modules/mailserver.nix b/modules/mailserver.nix
index 2ebfb8e..aa0b02a 100644
--- a/modules/mailserver.nix
+++ b/modules/mailserver.nix
@@ -64,6 +64,7 @@ in {
       "zen.spamhaus.org"
       "zombie.dnsbl.sorbs.net"
     ];
+    networks = [ "192.168.1.1/24" ];
   };
   mailserver = {
     enable = true;