Thursday, July 17, 2003 06:32 AM
I think the best answer is yes, some or most of the time, but not all of the time, depending on what mail servers are generating the DSN's (bounces). Go and look at the RFC's for DSN's, and see some examples. Collect some real examples of real bounces from your mailbox, including all the headers.
But there are lots of horrible mail servers out there, that don't follow standards... if you're lucky you won't have any subscribers on them!