diff --git a/modules/mail/mailman.nix b/modules/mail/mailman.nix
index 47e48ca..f9a9354 100644
--- a/modules/mail/mailman.nix
+++ b/modules/mail/mailman.nix
@@ -22,6 +22,8 @@
         ENGINE = "django.db.backends.postgresql";
         NAME = "mailman-web";
       };
+      ACCOUNT_EMAIL_UNKNOWN_ACCOUNTS = false;
+      ACCOUNT_PREVENT_ENUMERATION = false;
     };
     ldap = {
       enable = true;