已經卸除這個轉送訊息，因為無法在訊息存留時間內傳遞該訊息。這可能表示轉送路由設定不正確或目的地無法使用。

This forwarded message was dropped because the message could not be delivered within the message time to live. This may indicate that the forwarding route is incorrectly configured or that the destination is unavailable.