sa-learn - bayes training...

[Jean Caron]

Folks, 

I searched the archive, tried different things, yet I need to ask a few 
questions. 

I'm running SA 3.0.2 with Qmail/QQ 1.25, and procmail, on linux. Works 
great. Bayes auto-learns ok, I run sa-learn from a "dedicated" user every 
night for ham and spam. My logs show how many msgs were inspected and how 
many were learned. So far so good. 

Here's the part I'm unsure of, I have one centralized bayes DB own by this 
"dedicated" user. This user runs sa-learn against two shared folders, one 
for ham and one for spam. All users (only a hand full) may populate the 
shared folders. Many thousand msgs have gone through sa-learn. I thought 
this was all too easy... 

My problem is bayes does not seem to have any effect what so ever on the 
amount of spam delivered to INBOXes. I keep receiving these low score spam 
msgs still. 

I now suspect this centralized DB, updated by this user alone, may not 
produce the expected results. I've read in the archive that individual users 
should run cron jobs against their own ham and spam folders. The issue with 
this is that only one user has an actual shell defined on the system, so the 
others can't run cron. Then again, that just a suspicion, I may be wrong, 
and something else may be missing or mis-configured, and that's why I'm 
posting this... I'm a little confused. I don't understand how bayes works 
exactly, so I can't come to any helpfull conclusion about my setup. 

Can anyone see through this and help me understand what is happening ?
Thanks in advance,
Jean