Hello,
I'm new to Postfix and have been reading up on the various spam-fighting
features available. I get the general idea that I can have something of a
multi-tiered setup that should allow me to process a decent amount of mail
in an ISP environment. Smtp restrictions and reliable RBLs would be the
first line of defense (with negligible performance impact), then various
policy daemons (more expensive, but worth doing), and lastly filters to
catch the remaining junk (most expensive, and allows easy per-user
settings).
I'm pretty much set on what I want to do for smtp restrictions and have
found a few interesting policy daemons. Where I'm wanting a bit of a
reality check is on the last stage. It seems amavisd is generally what
people use, but I'm concerned about how much of a resource hog this might
be and what kind of impact this will have during a big joe-job bouncefest
or a giant spam run. I also have a somewhat irrational fear of letting a
perl daemon handle all of my email. Speaking of which, our current setup
involves the LDA calling maildrop to hand mail off to spamc, which then
hits a cluster of four boxes running spamassassin/spamd and clamav. It
looks like I could basically switch those boxes to be amavisd boxes with a
shared/replicated database and have a similar setup. This would make the
transition from our current setup to the new one a bit harder though, as
I'd have to not only coordinate moving my mail server, but also convert
all four boxes from spamd to amavisd.
Am I going in the right direction to handle a fairly large volume of mail?
Are there other filters I should be looking at that would call spamc or a
workalike to do the spam filtering? Are there any good reference guides
that deal more with "enterprise" scale systems?
Also, are there any mailing lists hosted elsewhere that allow discussion
of postfix-based mail servers in general where discussion can drift to
postfix-related software like amavis, dovecot, postfixadmin, webmail and
the like? Sort of a "postfix toaster" list?
Thanks,
Charles
___
Charles Sprickman
NetEng/SysAdmin
Bway.net - New York's Best Internet - www.bway.net
sp...@bway.net - 212.655.9344
