通过邮槽，客户机进程可将消息传送或广播给一个或多个服务器进程。在同一台计算机的不同进程之间，或在跨越整个网络的不同计算机的进程之间，协助进行消息的传输。-Through the mail slot, client process can be sent or radio news to one or more the server process. In the same computer between different process, or across the whole networ