> True, and true - but only the originating server (in my case, *mine*) > generates *legitimate* 'bounce' messages, so I can certainly block > illegitimate bounces (aka 'backscatter'). > > The only question here is how to do this without blocking *other* > legitimate messages with a null sender.
If ALL of your users use ONLY your mta for sending their mail, you can easily achieve what you want : -) put your server address in ispip -) deselect "Do Bomb/Script Regular Expressions Checks for ISPIP" -) create a list of subjects you want to filer (Delivery Status Notification \(Failure\) , etc.) Filter all bounces quoting a forged message-id (easy and really affective) Filter most common autoresponse / cr / autovirus notice / vacation notice /automatic mail you don't want Of course, in ispip you have to list ALL MTA that can send legitimate bounces. SO pls put there all smtp servers your users can use. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Assp-user mailing list Assp-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/assp-user