邮件服务器设计与实现

摘  要
电子邮件是介于书信、电话和传真之间的电子信息传送方式，它也是互联网上最基本的功能之1。随着互联网的进1步发展，电子邮件已经成为人们联系沟通的重要手段。技术的革新使得电子邮件系统已经演变成1个相当复杂且功能更为丰富的系统，可以传送声音、图片、图象、文档等多媒体信息，以至于数据库或帐目报告等更加专业化的文件都可以以电子邮件的形式在网上分发。随着信息技术的发展以及电子邮件系统功能的日益强大，其应用领域已得到较大的拓展。基于Web的电子邮件系统应用是这些年发展起来的，网络的普及使得它得以广泛的应用。采用开放的Web邮件服务不仅为用户省去了维护与升级客户端软件的麻烦，而且也能够充分发挥系统软硬件资源的作用。Web邮件服务的另1个优势是允许用户甚至是持有移动设备的用户，可以随时、随地的访问系统并进行信息传递。
邮件服务器主要实现邮件的发送和接收以及对邮件和用户的管理。该系统的功能分为3个模块：（1）通信模块，用来实现邮件在网络中的发送和接收；（2）用户模块，用于后台管理邮件服务器中的邮件和邮箱，可以删除、添加邮件和删除、添加邮箱；（3）系统模块，用来记录邮件服务器运行时的状态。

关键词：电子邮件；B/S；C#.NET；邮件服务器

Abstract
E-mail is a transfer way of electronic information among letter, telephone and fax. It is also one of the most basic functions on Internet. With the further development of Internet, the e-mail has become the important means of people’s connection and communication. The evolution of e-mail system has become very complicated and abundant by the innovation of technology, can convey multimedia information, such as sound, image, picture, file, etc., More specialized files, such as the data base or the account reports, etc. can all be distributed on the net in the form of E-mail. The e-mail system function is strong day by day with the development of information technology; its application has already got greater expansion. This paper is subject to how to build up email system on base browser to servers of application pattern, and study the relevant technology. The application pattern on the Web has developed these years. Popularization of Internet makes it apply broadly. Adopting open Web mail service, user not only have saved trouble of installing software, but also can fully give play to the role of resource of the software and hardware of system. Another advantage of Web mail service is to allow users, even hold users of mobile devices, can visit system and transfer information everywhere any time.

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Keywords: electronic-mail; B/S; C#.NET; Mail Server