A bounce server handles email delivery failures. You can think of it as a notification system. The server informs you when emails cannot reach their destination. You will receive messages about the reasons for the bounce. Common reasons include invalid addresses and full mailboxes. The server helps you maintain a clean email list. You must pay attention to these bounce messages. They provide valuable insights into your email campaigns. You can improve your sender reputation by addressing these issues. A bounce server is essential for effective email management. It keeps your communication reliable and efficient.