Internet E-mail系统的开发研究

电子邮件是Ｉｎｔｅｒｎｅｔ的重要组成部分。说明了ＴＣＰ／ＩＰ与邮件协议之间的关系，Ｃ／Ｓ模型的基本结构，Ｅ－ｍａｉｌ系统的主要组成部分和实现Ｅ－ｍａｉｌ收发的基本协议（ＳＭＴＰ，ＰＯＰ３）。运用Ｗｉｎｄｏｗｓｓｏｃｋｅｔ网络编程界面实现邮件协议。针对传统集中式电子邮件的不足，提出了分布式电子邮件的概念，从对二者进行比较中得出分布式电子邮件的优点，并设计出实现分布式电子邮件的主要模块结构。

RESEARCH ON DEVELOPMENT OF INTERNET E-mail SYSTEM

E mail is an important part of Internet. The relation between TCP/IP and E mail protocol ,the basic structure of C/S model, the key component of E mail system(user agent, outgoing queue, message transfer agent, mailbox ) and the E mail protocol are described .The theory of using Window Socket to implement the E mail protocol is applied,and the conception of the distributed E mail structure is put foward directed against the defect of the traditional centralized E mail.The prominent modules of the distributed E mail structure(the module of sending and receiving , the module of authorizing user, the module of storing E mail,the module of connecting user)is designed based on the comparison between the traditional centralized E mail and the distributed E mail structure .