Quoting Oren Held, from the post of Mon, 28 Jul:
> Few quick tips:
> - Try to see what is the filter which kills your CPU, maybe it's unnecessary?
how can I profile that?
> - Use the RAZOR2 filter, PYZOR, DCC
those slow down the process by a lot, and too many messages get stuck in
the queue. last time I used that I started losing legit mail because
remote SMTP servers kept timing out from all the load.
(to clarify - with the simscan setup, remote side don't get an SMTP OK
on the message before it's cheecked for virii and spam, which means they
get a 5XX error message instead of a good session reply, which is
excellent for some of the problems (you can't send spammers bounces),
but not when the sender is a zombie that doesn't care about failures and
doesn't report them back)
> - Use bayes filter ("teach" sa using sa-learn)
I do use it, it may actually be one of the bits that slows the system
down...
I might have to take the tests to near-line, i.e. refuse only to RBLed
mail like today, and accept otherwise potentially spam to be checked
later, at the mailbox level and not SMTP. it's much more of a headache
to set up in Qmail though, and I don't like it.
--
A total mindjob
Ira Abramov
http://ira.abramov.org/email/
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