On 4/3/10 8:24 AM, Masao Garcia at masaog@...
> Okay, I think I know what the problem is. Our reply-to addresses are for a
> domain that's not handled (yet) by our mail servers. We are in the middle
> of a transition to bringing our e-mail in-house away from an external
> pop/imap provider but during the transition we'd still like to keep the
> reply-to domain name the same (we just have forwards set up on our external
> provider to point to our temporary e-mail addresses). From looking at the
> logs, the bounce is going to our provider's MX server and stops there. If I
> change my reply-to to a domain that is handled by my relay then I get the
> bounce message back.
Once mail leaves your server, any bounce message generated by a downstream
server and sent back to you is "just another" piece of Internet mail and
goes to wherever mail is received for your address. There is nothing special
about a bounce message that would make the downstream server send it back to
the server that sent it the message.