>> What types of legitimate messages use null sender? Is it only DSN >> type messages? Someone else (Marrco?) said that Return receipts & >> vacation
> Bounce messages have a null sender, or else it'd keep on bouncing > back and forth. You don't want that to happen. There are legitimate > reasons for a null sender and it shouldn't be blocked. 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. -- Best regards, Charles ------------------------------------------------------------------------- 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