We have a problem setting up a email redirect for a mailing list provider.
The mailing list provider is using their server to send out marketing emails, using "firstname.lastname@example.org" as a sender address. In order to track down non-existent addresses etc, they want us to redirect all messages coming to "email@example.com" to "firstname.lastname@example.org". I've done it using the "Mail contact" functionality in Exchange 2007, but the problem is that NDRs are not forwarded. Out-of-office notifications, test emails are all forwarded out fine, it's just non-delivery reports that are not. When I check message tracking, it only shows a "RECEIVE" line and nothing else happens, so I suspect that Exchange is processing the message internally instead of forwarding it on. Is there a way to make Exchange forward those reports as well?