diff --git a/config/net/serv.nix b/config/net/serv.nix
index 98ade46..6ae0d27 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";
       # unused = "172.22.73.41";
-      # unused = "172.22.73.42";
+      mailtngbert = "172.22.73.42";
       grafana = "172.20.73.43";
       kibana = "172.20.73.44";
       public-access-proxy = "172.20.73.45";