在自己编写的图形界面邮件客户端程序中，客户输入常用的邮箱地址，能够和邮件服务器建立连接，通过本程序能够收发邮件-Which of the following is a primary method to illegally capture user sensitive information such as user passwords on a network

java语言实现的邮件发送客户端，包含了完整的源代码和SWT图形界面设计的包。-java language of the mail client, including full source code and SWT graphical interface design package.