采用Winsock进行邮件的收发,其中采用单个sockck连接,你可以封装成多线程程序，以便可以用于Web网页上，本程序已经用于实际的项目中，完全可以使用，不过需要安装.net框架-Winsock used for the collection and delivery of mail, which used a single sockck link, you can packaged as multithreading procedures to be used on the Web, thi