多出口校园网中E-mail服务的问题分析及解决

在高校校园网建设进程不断加快的背景下，网络的规模和技术特点都发生了很大变化．许多高校除原有的CERNET出口外，又增加了ChinaNet等其他出口，形成了多路由访问互联网的局面，一部分校园网启用了不对称路由．这一方面大大提高了网络的访问速度，另一方面也带来了一些问题，尤其是电子邮件服务由此引发的问题．笔结合在网络规划、设计和实施中的亲身实践，对其进行了分析研究，并给出了解决方案．

Analyzing and Solving the Problems in E-mail Service for Multi-access Campus Network

In the background of rapid development of campus network,the scale and the technique of network have all changed greatly.Many colleges and universities have appended new routers(ChinaNet etc.) to CERNET forming a status of multi-access to the Internet.In this case,some campus networks have introduced asymmetrical routing.On the one hand,it increases the speed to access network;on the other hand,it also brings some problems,especially the ones from E-mail service.Combining with our practice in planning,designing and constructing network,the authors analyze these problems and present a scheme to solve them.