A pdf document describing how Greg Williamson set up spam filtering at a home office which can ge extended to a large site.
Describes some best practices for email systems which use a challenge-response system to filter email. Once a user has sent an amail through this type of system, they can then send without challenge since they have proven they are human.
A pdf document that outlines several spam filtering techniques and describes why these techniques should be combined to provide better spam filtering.
Describes email filtering techniques and filtering principles.
Talks about some filtering spam projects and improving the performance of "A Plan for Spam" filtering algorithm.
This paper investigates the performance of two machine learning algorithms in the context of anti-spam filtering.
Describes how bayesian filters work and how they learn from receiving both spam and good mail.
Provides definitions related to spam filtering and additional documentation about the Spam Bayes Project.
Provides articles and links about various spam filtering methods.