diff --git a/config/net/serv.nix b/config/net/serv.nix
index 93a2019..116dfe8 100644
--- a/config/net/serv.nix
+++ b/config/net/serv.nix
@@ -45,7 +45,7 @@
       used25 = "172.20.73.39";
       used26 = "172.20.73.40";
       direkthilfe = "172.20.73.41";
-      mailtngbert = "172.20.73.42";
+      # unused = "172.20.73.42";
       grafana = "172.20.73.43";
       kibana = "172.20.73.44";
       public-access-proxy = "172.20.73.45";
@@ -79,7 +79,7 @@
       factorio = "172.20.73.73";
       zengel = "172.20.73.74";
       prometheus = "172.20.73.75";
-      mailtng = "172.20.73.76";
+      # unused = "172.20.73.76";
     };
     ipv6Router = "serv-gw";
     subnets6.dn42 = "fd23:42:c3d2:582::/64";
@@ -161,7 +161,7 @@
       network-homepage = "2a00:8180:2c00:282::2f";
       owncast = "2a00:8180:2c00:282::32";
       prometheus = "2a00:8180:2c00:282::4b";
-      mailtngbert = "2a00:8180:2c00:282::4c";
+      # unused = "2a00:8180:2c00:282::4c";
     };
   };