简单的邮件客户端程序，能够登陆并显示邮箱中邮件数目。-simple mail client program can access and display the number of email inboxes.

pop3实现邮件收发功能，可实现读取邮件数目，标题，内容等-pop3 e-mail send and receive functions to achieve, to achieve the number of messages read, title, content, etc.