diff --git a/src/main.rs b/src/main.rs
index 6eb17804ff3ab841a2638240ba6dc1b4748e2baa..3deaca066d6c417467140929ff4dcddd0ef509ff 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -290,6 +290,8 @@ async fn webhook(
             if write_configs(&mailboxes, &args).await.is_err() {
                 return HttpResponse::InternalServerError();
             }
+        } else {
+            return HttpResponse::NotFound();
         }
     }