说明：  该文档时javaMail开发文档，对于学习java电子邮件的开发很有用，里面详细的介绍的javamail的核心类和如何去使用它开发出类似MSOutlook,foxmail等电子邮件客户端程序！希望对那些学习javamail的人有帮助。
(JavaMail development document, the document is useful for learning java development of the e-mail, which provides detailed descriptions the JavaMail core of classes and how to use it to develop similar MSOutlook, foxmail and other e-mail client program! The javamail learning.)