Postfix e-mail system is analyzed systematically. After considering two aspects about function and scale, A new kind of e-mail system frame is brought forward. A commercial e-mail system based on opening code is implemented.

• 从分析POSTFIX邮件系统入手,基于系统规模与扩展功能两方面考虑,提出了一种新邮件系统框架,实现了基于开放代码的商用邮件系统,解决了邮件系统商用功能与成本之间的矛盾。