diff --git a/lass/2configs/base.nix b/lass/2configs/base.nix
index 66f86ec7c..581e990e7 100644
--- a/lass/2configs/base.nix
+++ b/lass/2configs/base.nix
@@ -39,6 +39,7 @@ with lib;
   krebs = {
     enable = true;
     search-domain = "retiolum";
+    exim-retiolum.enable = true;
   };
 
   nix.useChroot = true;