Jack Gostl wrote:
Well... I'm convinced. I turned off autolearn a week ago, and things
have never been smoother. Its a shame really, that's a nice feature, but
for some reason it waters down the Bayes resolution until its almost
useless.
Most likely because the autolearn thresholds are too generous. The
possibility to autolearn spam as ham and/or ham as spam is too great. I
have been running with autolearn enabled, my thresholds set to:
bayes_auto_learn_threshold_nonspam -0.1
bayes_auto_learn_threshold_spam 12.0
without any problems for almost 3 years now. My bayes database has
never been better. I think too many people have problems with it
because of the defaults and instead of trying to figure out how to make
it work better, they just turn it off and call it "broken".
-Jim
----- Original Message ----- From: "Jack Gostl" <[EMAIL PROTECTED]>
To: "Anthony Peacock" <[EMAIL PROTECTED]>; "SpamAssassin"
<users@spamassassin.apache.org>
Sent: Monday, February 05, 2007 7:06 AM
Subject: Re: Bayes resolution gettin weaker
----- Original Message ----- From: "Anthony Peacock"
<[EMAIL PROTECTED]>
To: "SpamAssassin" <users@spamassassin.apache.org>
Sent: Monday, February 05, 2007 3:56 AM
Subject: Re: Bayes resolution gettin weaker
Hi,
Jack Gostl wrote:
I've been watching this for awhile, and there is now a pattern to
what I'm seeing.
I'm running a configuration with multiple users sharing a bayes
files. This is an interim move to facilitate the spamassassin
upgrades, and like many interim moves its been going on for a long
time.
When I first build the bayes files from my personal folders and my
spam archives, things were great. 99.8% of the spam caught or
better. Then, usually after a week or so, the number starts to
drop. Right now, its down to 97%, in another day or two it will be
down below 95%. With the amount of spam we receive, that is a lot
of missed junk mail.
So I blow away my bayes* files, rebuild, and I'm back up to darn
near 100% caught. For about a week. Then the deterioration begins
again.
Has anyone else encountered this? Is this an artifact of too many
users sharing a spam file?
Also.... I retrain each night, feeding any missed spams plus any
new hams received back through sa-learn. I can't see how that
makes it worse, but who knows.
Do you have autolearn enabled?
Uh... yes? You are suggesting that I turn it off? I had always
assumed that if the Bayes learned something as ham that it
shouldn't, sa-learn was smart enough to undo it.
Change the thresholds for auto learning. Mine are:
bayes_auto_learn_threshold_nonspam -0.1
bayes_auto_learn_threshold_spam 12.0
I'm willing to try. I made the change in my user_prefs and we'll see
what the next week brings.
Thanks
