Kevin wrote: > Do any MTAs actually track MIDs the way the OP requested? > > Off the top of my head i can't claim to have ever see > something like that.
Well, I don't suppose it would be the MTA. It would be ASSP that looks for the MID. Here's the flow I see (of course I could very well have it all wrong): Sender(protected by ASSP) -> Mail Server -> ASSP (adds Message ID tag to header and records sending date/time of Message ID in a log file) -> Outbound SMTP -> Receiving Mail Server (User email doesn't exist and so it rejects) -> ASSP (Detects whether it is NDR or not and if it is scans the first X amount of bytes of the header[the original header should still be there although certainly not the primary header right?] and determines whether or not to accept or deny. If it was not originally sent through sender's ASSP, the Message ID won't be anywhere in the header or the ASSP log and ASSP can safely block) -> Receiving Mail server -> Mail User That is my wild imagination of how it would work. Of course, I don't completely understand what goes on when a real NDR is sent back to a sending server. I've seen that sometimes the complete message gets returned to someone and sometimes just header information. Who knows? Regards, Brett ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Assp-test mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-test
