This is a strange requirement, but for demo purposes we need this. We have a test domain with Exchange 2003 and MOSS 2007. For an external demo (the SharePoint is published on the Internet) we've decided to give our AD account an external email: firstname.lastname@example.org. The problem is that now the Exchange in our test domain would treat this email address as local and would not send outbound messages with this address.
Is it possible to configure the Exchange, the AD User or SharePoint so that SharePoint picks up the external email and the Exchange treats the address as external when SharePoint sends notifications using that address?