12 messages in net.sourceforge.lists.courier-usersRE: [courier-users] SPAMmers using mu...
FromSent OnAttachments
Steve JacobsonAug 26, 2005 10:51 pm 
Gordon MessmerAug 26, 2005 11:50 pm 
Sander Holthaus - Orange XLAug 27, 2005 3:03 am 
Sam VarshavchikAug 27, 2005 4:21 am 
Robert PenzAug 27, 2005 4:27 am 
Michelle KonzackAug 27, 2005 4:46 am 
Sander Holthaus - Orange XLAug 27, 2005 4:56 am 
Sander Holthaus - Orange XLAug 27, 2005 5:01 am 
Robert PenzAug 27, 2005 5:42 am 
Jay LeeAug 27, 2005 7:57 pm 
ScottSep 1, 2005 1:30 pm 
Sam VarshavchikSep 1, 2005 3:58 pm 
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Subject:RE: [courier-users] SPAMmers using multiple IPsActions...
From:Sander Holthaus - Orange XL (in@orangexl.com)
Date:Aug 27, 2005 5:01:01 am
List:net.sourceforge.lists.courier-users

cour@lists.sourceforge.net wrote:

On Saturday 27 August 2005 07:47, Steve Jacobson wrote:

This has gotten bad to the point of making courier unusable - the spammers are hitting up to the MAX connections, and no courier feature slows them down. My users can't send mail, because any new threads I make available are taken up by the spammers.

Any thoughts?

use http://phantom.dragonsdawn.net/~gordon/courier-patches/courier -pythonfilter/

it has greylisting. it just does it after the data block so for bigsites its generates more traffic than the postfix one

I've also written some plugins for it

http://robert.private.outertech.com/courierfilter/attachment.py http://robert.private.outertech.com/courierfilter/auth_user.py http://robert.private.outertech.com/courierfilter/not_from_us.py

I was writing a dialout-filter, but stopped after I figured that since it is called after dataend, it's just not the right thing to do. Greylisting and dialout are really nice things to stop spam/virii (beside the fact that it will stop most things at the smtp-conversation, it also means that there is a much higher chance that spamfilters and virusscanners will pick up the message if it gets through), but implementing them (the right way) is quite a challege.

I really hope Courier will have those features built-in some dayn...

Kind Regards, Sander Holthaus