10 messages in net.sourceforge.lists.courier-usersRe: [courier-users] Filter some postm...
FromSent OnAttachments
Antonio Di MonacoFeb 21, 2007 1:42 pm 
C. J. MeidlingerFeb 22, 2007 4:24 am 
Antonio Di MonacoFeb 22, 2007 5:44 am 
C. J. MeidlingerFeb 22, 2007 6:28 am 
Gordon MessmerFeb 22, 2007 7:01 am 
Antonio Di MonacoFeb 22, 2007 7:17 am 
Marcin SemeniukFeb 22, 2007 7:27 am 
Otto SolaresFeb 22, 2007 8:18 am 
Gordon MessmerFeb 22, 2007 9:09 am 
Alessandro VeselyFeb 22, 2007 11:22 pm 
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Subject:Re: [courier-users] Filter some postmaster messagesActions...
From:Otto Solares (sol@guug.org)
Date:Feb 22, 2007 8:18:11 am
List:net.sourceforge.lists.courier-users

On Thu, Feb 22, 2007 at 04:28:13PM +0100, Marcin Semeniuk wrote:

On Thu, Feb 22, 2007 at 04:17:43PM +0100, Antonio Di Monaco wrote:

Hi,

Hi,

well, I've checked better this phenomena, and I found out that there's a repeating issue. This is a standard NOTICE message:

To save privacy, I put KNOWN_USER@CORRECT_DOMAIN as a valid email address, and UNKNOWN_USER@CORRECT_DOMAIN as a non-existent email address, even if the domain is correct and is equal in both addresses.

I hope that this can help finding a good solution, I'm really getting annoyed about them :(

P.S.: I use MySQL for mail delivery instructions.

Thx a lot in advance, Tony.

It's known problem, try looking in this list archives for thread named "DSN backscatter to postmaster for forged addresses in my domain". There is some explanation why this happen and why it can't be easily fixed. I have same problem and I'm looking for good solution. Maybe some kind of check if "mail from:" contains valid user if address is local ? Any suggestions are welcome.

I get rid of such messages with SPF and default backscatter configuration.

-otto