There are following 3 files in /var/spool/MIMEDefang directory, which are pretty big in size.
auto_whitelist bayes_toks bayes_seen
What are these 3 files for ?? Does these files always grow ?? Can we empty these files ( for space) ??
Those files are used by SpamAssassin for its auto whitelist and its Bayesian classifier. You shouldn't delete them unless (a) the data has been corrupted or (b) you turn these features off in your SpamAssassin config.
The auto whitelist is more of a score averaging system - it adjusts scores based on what else that sender has sent you in the past - and if you have it running it updates the data whenever SA processes a message.
The bayes database learns from the spam and non-spam you get, based on manually teaching it ("This folder is all spam, this one is all non-spam") and/or on messages that SA scores very high or very low, if you have auto-learning enabled in your SA config. (The key command here is sa-learn).
In both cases, information is always being added to the database, so you can expect the files to keep growing until data starts expiring (see the SA docs for more info).
Kelson Vibber
SpeedGate Communications <www.speed.net>
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