强大的系统邮件发送功能： 　　从前台用户注册、加入班级和在班内留言、上传照片，到后台系统管理员删除、合并班级等操作 ，系统都会自动发送邮件通知相关用户。-powerful system to send mail functions : prospects from registered users by adding classes and class mail, upload pictures, the system administrator to delete the background, the operational merger classes, the system will automatically send e-mail users are notified.