Though there is completed software for email intelligent processing on abroad (e.g. Lydia Email Agent), there is no similar software in China. There are many email service agents, which can filter emails. But they only can process email by its address.

• 目前，国外有一些成形的智能处理邮件的软件（如Lydia Email Agent等），但它们和本文提出的邮件分类原则并不相同。