Hi Benoit,
I don't know if you already checked it, but this might be a useful source:
http://www.spamcop.net/fom-serve/cache/329.html
Exchange is mentioned there with either a solution for V 5.5 [1] or for 2k/2k3 [2].
[1] http://support.microsoft.com/default.aspx?scid=kb;en-us;837794 [2] http://support.microsoft.com/default.aspx?scid=kb;en-us;294757
I did not have a look at these URLs but they _might_ help you :-)
Anyway IMHO classifying mailservers as "spam"-servers just because of auto-responders is one thing why I would never use blacklists like spamcop. Imagine you have customers with so-called "catch-all" or "multidrop" accounts which are also using auto-responders. I cannot figure out a solution for this scenario without getting listed at spamcop at their current policy. If somebody knows a solution for qmail+vpopmail+chkuser => Please tell! Using another server for sending bounces/auto-responders is IMHO not a solution.
Cheers
Tobias
-----Ursprüngliche Nachricht----- Von: Benoit Panizzon [mailto:panizzon@woody.ch] Gesendet: Montag, 30. Januar 2006 09:35 An: swinog@swinog.ch Betreff: [swinog] Prevent Bounces from MS-Exchange?
Hi all
We got occasional complaint from spamcop and similar about exchange servers of customers sending bounces to faked sender addresses.
The only way to solve this problem I have found is to completely disable NDR in Exchange: http://support.microsoft.com/default.aspx?scid=kb;en-us;294757
Isn't there any way to make exchange reject unknown users during smtp handshake like all other MTA do?
-Benoit-