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Filtering Spam Email Based on Retry Patterns

Author(s): Peter Lieven, Björn Scheuermann, Michael Stini, Martin Mauve.
Title: Filtering Spam Email Based on Retry Patterns
Published: ICC 2007: Proceedings of the IEEE International Conference on Communications, pp. 1515-1520, Glasgow, Scotland, UK, June 2007
Keyword(s):
Abstract: A central problem in today's Internet is unsolicited bulk email: spam. The SMTP protocol lacks a mechanism for verifying the source of a message, and respective protocol extensions are still far from becoming standard. Content-based automatic spam filters are thus often used, and simple origin-based filtering techniques like black- and whitelists are also very common. In this paper we first analyze the retry behavior of Internet mail sources upon delivery errors. We then propose a novel spam filtering approach, founded on the results of this analysis. It is based on the observed reaction of a mail source host to temporary errors. Furthermore, evaluation results from the production use of our filter on real mailservers are given, underlining its very good performance in practice.
Note: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
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