diff --git a/client/list_mailboxes.go b/client/list_mailboxes.go
index eacf62d..d591cec 100644
--- a/client/list_mailboxes.go
+++ b/client/list_mailboxes.go
@@ -1,3 +1,8 @@
+// Copyright (c) 2025 H0llyW00dzZ All rights reserved.
+//
+// By accessing or using this software, you agree to be bound by the terms
+// of the License Agreement, which you can find at LICENSE files.
+
 package client
 
 import (