自从Internet消息传送标准制订开始,IMAP4协议就引起了广泛关注。总地来讲,IMAP4弥补了POP3中缺乏的客户机/服务器消息传送功能,使之更适于今天分布式的计算环境。例如,IMAP4支持移动用户需要的全脱机模式操作,用户可以脱机维护客户机和服务器的消息存储,然后在与网络连接时与服务器同步。使用IMAP4,用户在从较慢的网络下载大型多部分的消息文件时候也更灵活。 Since the beginning of the Internet messaging standards development, IMAP4 agreement has caused widespread concern. In general, IMAP4 makes up for the lack of client / server messaging in POP3, making it more suitable for today’s distributed computing environment. For example, IMAP4 supports full offline mode operations required by mobile users, users can maintain client and server message stores offline, and then synchronize with the server when connected to the network. With IMAP4, users are also more flexible when downloading large multi-part message files from slower networks.