I have followed all the Microsoft documentations to enable copies of local ndr's to be sent to a mailbox. Yet it doesn't work. I have rebooted the mailbox/hub transport server.My environment - 1 windows 2003, 1 2007 mailbox/hub transport.Thanks for any help.

Explain some more about what you want to do.If a internal user send a mail to Internet and delivery will fail a NDR will be sent back the the original sender.maybe NDR is caught by anti spam software?lasse at humandata dot se, http://anewmessagehasarrived.blogspot.com

If a local sender with ourdomain.com sends an email to a non-existant user @ourdomain.com, shouldn't that ndr be copied to the mailbox that I have designated?

Could you please double check your setting with below article. I guess you might have skipped/missed some steps http://www.petri.co.il/monitor-exchange-2007-non-delivery-reports-ndr.htm Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

OK. Thanks. I just needed to add some codes.However , now I'm getting Out of Office replies to mailbox overage warnings. Anyway to stop that?Thanks