基于SMTP和POP3的邮件传输系统的设计和实现.doc

武汉工程大学邮电与信息工程学院 毕业设计（论文）Email Sending and Receiving System Design Based on SMTP and POP3 学生姓名 郑淋　 学 号 6404030131 专业班级 网络工程0601 指导教师 魏银珍 2010年5月 没有任何剽窃、抄袭、造假等违反学术道德、学术规范的行为，也没有侵犯任何其他人或组织的科研成果及专利如摘要 随着关键词：Abstract With the network technology matures, e-mail technology is more and more sophisticated. Nowadays, E-mail has become one of the most widely used service on Internet. The dissertation designs and implements a server-based SMTP and POP3 email delivery system. The system allows users to easier manage e-mail, users can receive and send e-mail without landing website. This system consists of three parts: user setting, E-mail sending and E-mail checking. It uses C/S design patterns, SMTP server and POP server as Server-side, client is sending and receiving e-mail program. The part of User setting is used to register users and manage basic information, it storage the information in the local disk. The part of E-mail sending is communicating with the SMTP server by Simple Mail Transfer Protocol and the part of E-mail checking is communicating with the POP server by Post Office Protocol. The Simple Mail System support not only English, but also Chinese. Limited by RFC822, the text of E-mail can only use ASCⅡ character set. Thus, this system makes use of MIME to encoding and decoding, and expanding mail norms. In the end, Making a testing for the Simple Mail System. Test when using Outlook as a test tool，Respectively to test receive and send messages. The dissertation introduces the system from the following aspects: the purpose of the design, the key technologies, the design and the implement of the system, and the system test, and so on. Finally, it makes summary and outlook of the dissertation. Key Words：Structure of mail body；SMTP；POP3；Sending and Receiving System目录 1章 绪论 1 1.1 课题的背景和来源 1 1.2 系统的开发环境 2 第2章 E-MAIL相关知识 3 2.1 信件结构 3 2.2 SMTP和POP3协议简介 5 2.2.1 SMTP协议 5 2.2.2 POP3协议 5 2.3 MIME编码解码