hMailserver是一个开源免费的mail服务软件，它很小3M多并且支持POP3、SMTP、IMAP服务、多域名、别名、SSL支持、防病毒、防垃圾、内置备份功能、脚本支持、服务端规则支持、多语言、MYSQL、PostgreSQL或MSSQL后端支持、web管理界面等等功能。

邮件服务器软件hMailServer（用最新5.3.3）：http://www.hmailserver.com/?page=download

-hMailserver is an open source free mail services software, which is very small 3M and support for POP3, SMTP, IMAP services, multiple domains, aliases, SSL support, anti-virus, anti-spam, built-in backup function, scr ipting support, support server-side rules, multi-language, MYSQL, PostgreSQL or MSSQL backend support, web management interface, and more.

E-mail server software hMailServer (with the latest 5.3.3): http://www.hmailserver.com/?page=download