基于Qmail的邮件过滤网关关键技术研究

Study on Key Technologies of Email Filtering System Based on Qmail

本文从邮件过滤网关的实际功能需求出发，详细介绍基于qmail的邮件网关中应用到的透明网桥模式、SMTP认证和邮件内容过滤等技术的实现。

This article analysis the actual function requirement of Email Filtering System. We particular introduce an Email filtering system based on Qmail and the technology of transparent gateway, SMTP authentication and Email content filtering which apply on the system.