随着计算机科学技术的发展和互联网的普及，在线聊天已经成为人们日常生活中必不可少的通信方式，而同时电子邮件（E-mail）又是一种比传统邮件更快捷更经济的收发邮件方式。一个集成了网上聊天和电子邮件收发的系统可为人们的日常生活提供更大的便利。该系统以Delphi7.0为开发工具，基于UDP协议的聊天模块能够实现网内群聊或点对点对话，基于SMTP协议、POP3协议的邮件模块能够收发邮件。-With the development of computer science and technology and the popularity of the Internet, online chat has become an essential means of communication in daily life, while e (E-mail) but also a more efficient than traditional e-mail send and receive messages and more economical way. An integrated online chat and e-mail system can provide for people' s daily lives more convenient. The system Delphi7.0 as development tools, based on UDP protocol module to achieve net chat group chat or peer dialogue, based on SMTP protocol, POP3 protocol module to send and receive email messages.