前置式邮件过滤系统的设计与实现

Design and Implementation of the Prefix Email Filtering System

针对互联网垃圾邮件泛滥的现状,该文设计了一种新的前置式邮件过滤系统。该系统独立于原邮件服务器,动态统计各SMTP客户端的发信频率,同时使用基于有限自动机的DFSA算法,快速过滤各种常见汉字编码的电子邮件。对于拦截信件,系统开放必要的邮件转发恢复操作,从而把误拦正常信件的可能性降至最低。该文最后给出系统实现并且进行性能验证。

In order to decrease the great deal of Spam in the Internet,this paper proposes the design of prefix email filtering system.Such filtering system is separated from the original web mail server,it controls the mailing frequency of each SMTP client dynamically,and check the content of received Email in normal Chinese character encoding with the algorithm of DFSA.To take the filtering accuracy into account ,this system will send the useful Emails,which are blocked by error,back to the mail server.We discuss the system performance by actual working results at the end.