Exchange 2003: Recieving NDRs between domains with internal Mail
I have an Exchange 2003 server, it currently services 2 seperate domains and has no virtual servers. When users on Domain A send email to multiple users on Domain B, we will recieve at least 1 NDR indicating that the "recipents destination email system is unknown or invalid" I don't get an NDR on all recipents, just maybe 1 or 2 out of a group.
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