Patrick Ben Koetter schrieb am Thursday, den 31. January 2013: > * Jo Rhett <[email protected]>: > > So I've been a sendmail admin for 20+ years and never saw any need for > > postfix. I was very happy with sendmail and amavisd-milter and amavisd. > > However, when rebuilding my colo box I decided to go ahead and learn > > postfix, just so I can see how the other half lives ;-) > > > > First, I found that all of the published recipes for spam containment with > > postfix are bogus. They either create back-scatter, or they drop messages > > which hit the filter instead of rejecting them in the SMTP session like they > > are supposed to. So if something is a false positive, the far side will > > never know it happened. Neither of these situations is playing fair to other > > parties. > > > > So I've done some testing and work, and I currently have postfix using > > amavisd-milter as a before-queue spam test, which properly rejects spam > > during the SMTP session. This solves both of the previous problems and > > brings postfix users closer to being a proper mail gateway. I believe very > > strongly that this recipe should replace the existing documentation, to > > avoid sending new users out to become backscatters. > > Agreed. I will expand the documentation as my time permits. There's good > reason to keep both approaches. Some countries don't see the need to do > pre-queue filtering; they have different ideas of a good [TM] content filter > policy. Or reliable filters under heavy load ;)
Alex -- Alexander Wirt, [email protected] CC99 2DDD D39E 75B0 B0AA B25C D35B BC99 BC7D 020A
