扩展SMTP协议主动阻断垃圾邮件

针对垃圾邮件问题，分析当前技术的不足，对现有SMTP协议进行扩展：要求发送方在会话中主动申报所发信息类型；根据用户和邮件服务商的行为为其分配诚信度，以诚信度 约束他们在电子邮件系统中的权限；在电子邮件系统中实现诚信机制以主动阻断垃圾邮件。

Extending SMTP to Anti-Spam Actively

Spare is getting the high attention of the researchers recently. However, there is still no method available to anti-spare actively. The paper presents innovative ideas which include the sender＇s declarative statements about the type of Email and the assignments of credits to ISPs and users accordingg to their respective behaviors. SMTP extends based on the above ideas to help restrict the propagation of spare actively and establish a creditable env ironment in the Email system.