基于MVC的网络邮件收发系统，可以在本地局域网内和网上收发邮件，以及删除、修改、放回收站、永久删除、添加联系人、分新旧邮件的等功能-MVC-based Web mail system, within the local area network and on-line e-mail, and delete, modify, put the Recycle Bin, permanently deleted, add contacts, d