Re: spamhaus
  By: Kees van Eeten to Alexey Vissarionov on Sat Sep 12 2015 11:09 am

 KV> Hello Alexey!

 KV> 12 Sep 15 11:22, you wrote to Benny Pedersen:

 AV>> No: blacklisting the IP networks is the only effective way to fight
 AV>> spam. 

 KV> I agree with all your methods. At a later stage I added Greylisting, that
 KV> seems quite effective when the messages originate directly from a spambot.
 KV> These bots, have no memory for temporary rejects, a real mail server will
 KV> try again later, with the same message.

While that used to be true. most spambots these days have their own queues or
defer themselves to send through another mail server that does have a retry
queue. 

Greylist filtering, thus, has become something that is no longer a useful thing
more so than other methods. 

I'm actually using Postfix's newer approaches to handling spam and it does the
job almost perfectly, though some spam still gets, just not a lot thanks to the
new setup.. That's utilizing the newish postscreen.

On IRC, best resource to get help on this is from Freenode IRC's #postfix, and
they are very helpful on the subject.

My system, in overall, utilizes postfix with postscreen, various reliable RBLs,
dspamd with dovecot using the antispam plugin to train spam/ham messages. With
the few spam that still gets through, continued manual training has almost
completely eliminated my spam issues, far more so than Google's Gmail has been
able to do.

)))[Psi-Jack -//- Decker]

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