Definitions for "Bayesian filter"
Technique that looks beyond subject lines and headers into the entire e-mail message to identify spam; Bayesian filter software refines its spam-identifying criteria the more it analyzes messages.
A spam filter that is adaptable and “learns” to identify new patterns of spam by examining the words and punctuation of both valid and spam email.
a statistical filter that you have to train first to learn what is spam and what is not spam