atom feed10 messages in net.sourceforge.lists.courier-usersRe: [courier-users] Courier-MTA + Gre...
FromSent OnAttachments
Vasiliy KotikovMar 10, 2009 2:51 am 
Marcus IlgnerMar 10, 2009 4:36 am 
sergioMar 10, 2009 5:37 am 
Marcus IlgnerMar 10, 2009 6:36 am 
LuKremeMar 10, 2009 12:11 pm 
Alessandro VeselyMar 11, 2009 2:04 am 
Tim LythMar 11, 2009 4:12 am 
LuKremeMar 11, 2009 6:45 am 
cour...@thefreecat.orgMar 11, 2009 7:12 am 
LuKremeMar 11, 2009 2:06 pm 
Subject:Re: [courier-users] Courier-MTA + Greylisting
From:Marcus Ilgner (marc@gmail.com)
Date:Mar 10, 2009 6:36:52 am
List:net.sourceforge.lists.courier-users

On Tue, Mar 10, 2009 at 1:38 PM, sergio <ser@neonet.ua> wrote:

Hello Marcus,

Tuesday, March 10, 2009, 1:36:44 PM, you wrote:

On Tue, Mar 10, 2009 at 10:52 AM, Vasiliy Kotikov <eln@gmail.com> wrote:

Hello!

Do anyone use greylisting on courier? Is there a solution (Courier-Filter, spamassassin)?

-- Best Regards,

Vasiliy Kotikov

Hi,

my setup uses Courier Pythonfilter (http://phantom.dragonsdawn.net/~gordon/courier-patches/courier-pythonfilter/latest/) by Gordon Mesmer. Among other modules it also includes a greylisting filter which works great. I found greylisting to be one of the most, maybe even the most effective solution to reduce unsolicited bulk mail. See the readme file for installation instructions.

to  Marcus: do you using greylisting module with default configuration or you find some more usefull conf. I'm thinkig about change filter from spamassassin to greylist. Can you compare these two mudules? thanks.

Best regards Marcus

Hi,

comparing Spamassassin to greylisting is a bit difficult as the two do completely different things. I suggest adding greylisting to your setup in addition to other filtering measures you may employ. Probably your current configuration employs SA during post-processing but pythonfilter works before new mail gets accepted for delivery. Greylisting simply rejects every incoming message and asks the sender to try again a bit later, SA analyzes the actual content of the message and tries to discern if it contains unsolicited bulk mail. It is also possible to use SA in pythonfilter and completely reject any mail identified as junk instead of just marking it as such but that makes it much more difficult to deal with false positives. Regarding my pythonfilter configuration, I'm not really sure if I did further tweaking but I remember that it wasn't really necessary because it all worked fine out of the box.

HTH Marcus

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