Ian, thanks for the reply. Answering your question, no I havent tried to disable NDRs. As I understand it, after disabling NDRs, the front end would still accept the messages for bogus addresses, it just wouldn't notify the sender unless there is something extra that disabling NDRs does, that I'm mi...

I'm not sure if this has been addressed before, but I couldn't find much resolution to this question in existing posts. Here is the scenario: I have an ME front end box domain-smart hosted to ME back-end where user mailboxes exist. Front-end accepts all messages for the smart-hosted domain whether t...