Anti-spam Research

Because the junk mail has enormous hazardous and the mail system of Xichang College is establishing, how effective prevented harm for the junk mail to the institute network is the key point of this article.This article first carries on the investigation to the domestic junk mail dissemination situation, analysis the investigation result to discover its characteristic. Then conducts the research to the existing counter- junk mail technology. Finally, these technical and the findings applies to the Sendmail and the Postfix server, and proposes a set of counter- junk mails plan. The main contents are:1. Dissects the domestic junk mail dissemination situation;2. Aims at the result to carry on the counter- junk mail technology analysis to discover the characteristic, the main research technology filters are the technology;3. These technologies and result applies to the Sendmail and Postfix server;4. Aims at the key point situation of Xiehang College to propose with a set of counter- junk mails plan, formulates the corresponding legal laws and regulations in this set of plan is the foundation of counter- junk mail, but the soft, hardware synthesis preventing and controlling, the server end and the customer end counter- junk mail which proposed is the key of the counter- junk mail technical.