White Papers

SMTP Analysis, Heuristic Analysis and Multi-Tier Anti-Spam in an Email Security Gateway

Category: Security

Tags: email security, spam, virus, smtp, email

Overview As spam attacks become more frequent and increasingly more sophisticated and varied, a new spam identification and filtering technique that is highly adaptable to the specific nature of the organizations can be found based on the Bayesian probability theory. Also, many spam behaviors require multi-tier anti-spam functions working together in analyzing the SMTP, email contents, and in conducting the scan from Real-time Spam Black Lists (RBL) to block malicious email. This paper describes the SMTP analysis, the heuristics analysis, and the multi-tier anti-spam techniques that an email security gateway could deploy effectively in blocking spam and virus.

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Publisher
O2Micro
File Format
PDF
Date Published
May 31, 2008
Format
White Papers
Topics
Network Security, Security Tools, Security Management

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