diff --git a/postfix.nix b/postfix.nix
index 600a5d3..c9654b1 100644
--- a/postfix.nix
+++ b/postfix.nix
@@ -18,6 +18,6 @@
     enable = true;
     selector = "default";
     socket = "inet:8891@127.0.0.1";
-    domains = "csl:${config.networking.fqdn}";
+    domains = "csl:${config.networking.fqdn},admin.${config.networking.fqdn}";
   };
 }