电子邮件客户端.doc

摘 要 电子邮件是一种通过电子手段提供信息交换的通信方式。如今越来越多的企业单位通过电子邮件来协同工作, 打破时间与地域的限制, 实现办公自动化, 大大地提高了工作效率。可以说, 电子邮件已经成为人们生活中不可缺少的一部分。 本论文首先阐述了电子邮件客户端应用程序的开发背景和系统的开发平台，并对系统开发所采用的技术进行相应的介绍。在系统的分析阶段，分析电子邮件的结构和邮件文本格式，介绍电子邮件系统工作原理，并对SMTP和POP3协议进行深入研究。在系统的设计与实现中，确定系统的开发思想以及开发环境。最后给出了系统中模块的详细设计与实现，并对系统模块涉及到的关键源代码进行了详细的分析。 系统使用Visual C#作为开发语言，Visual Studio 2005为开发工具，开发一个功能全面，应用广泛的电子邮件应用程序。系统实现的功能主要是帐号登录，发送与接收电子邮件及其附件，管理电子邮件等。 关键词：电子邮件 电子邮件系统 电子邮件客户端 SMTP POP3 Title The Design and Implementation of E-mail Client Abstract E-mail is a means of providing information through electronic means of communication exchange. Now, more and more enterprises communicate through e-mail in order to work together to break the restrictions of time and victoria, realize office automation, and enhance the work efficiency greatly. It can be said that E-mail has become a indispensable part of people’s normal life. Papers first illustrate the development background and system development platform of E-mail client application program and introduce the corresponding technology used in the system development. In the system analysis phase, papers analyze the structure of e-mail client and the type of text messages, describe the working principle of E-mail client, and study SMTP and POP3 protocol in a deep-seated level. In the design and implementation phase, the system identified the development thoughts and development environment. Finally, papers provide system modules for the detailed design and implementation, and a detailed analysis for the key source code related to system modules. The system uses Visual C # as developing language, Visual Studio 2005 as developing tools for the development of a full-featured, widely used email client. The main function of the System is to login accounts, send and receive e-mail and its attachments, manage e-mail