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电子邮件系统的安全问题,已经引起人们的高度重视,关注电子邮件系统的安全问题对整个计算机网络安全起到举足轻重的作用。一、Email 的传递过程及特征电子邮件 Email 系统按其功能由三部分组成:服务器部分用来向外部主机发送邮件;发信代理部分将邮件正确地放入本地主机邮箱中;用户代理部分让收信人阅读邮件,并编排出站邮件。用户利用电子邮件工具进行邮件书写、递交、收取及阅读。邮件的传递特征表现在:Email 传递与其他网络使用方法有根本区别。远地计算机设备或网络连接故障时,系统仍可提供发
E-mail system security issues have attracted people’s attention, attention to the security of e-mail system for the entire computer network security plays a decisive role. First, the process of Email delivery and features Email Email system by its function consists of three parts: the server part is used to send mail to the external host; send the proxy part of the mail correctly placed in the local host mailbox; user agent part of the income Letters read mail, and organize outbound mail. Users use e-mail tools to write e-mail, submit, receive and read. Delivery characteristics of the mail in: Email transfer and other network usage is fundamentally different. The system may still provide hair when the remote computer equipment or network connection fails