postfix mail filtering with amavisd-milter - works!

Patrick Ben Koetter p at
Fri Feb 1 22:02:00 CET 2013

* Alexander Wirt <formorer at>:
> Jo Rhett schrieb am Friday, den 01. February 2013:
> > On Feb 1, 2013, at 12:34 PM, Jo Rhett wrote:
> > > On Jan 30, 2013, at 11:42 PM, Alexander Wirt wrote:
> > >> Or reliable filters under heavy load ;)
> > > 
> > > 
> > > I keep hearing this argument, and every time I hear it I compare mail statistics with the person who says that you can't filter during the session and it turns out we process 5-10x the mail load that they do (sometimes 20x or 100x), and we filter before queue. I believe that this statement is due to misbelief and ignorance rather than real testing.
> > 
> > Note that I don't have load testing experience with postfix yet, so that may be a problem. If so, I'll return to sendmail because I was previously doing this with a single-core 1.4ghz athlon processor and 2gb of RAM. So yeah, not much horsepower required. Recent system is 16gb 8 core, so if postfix can't keep up then it's the problem.
> > 
> Trust me, we have more ram and more cores. And no postfix is never the
> problem. 

Content filter are ALWAYS the problem. It's cheap to do a SMTP session, but it
cost a fortune to rip content apart and then turn over each bit just to tell
its malware or not.

p at rick

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