Any idea's what is causing this?
We are running Windows 2003 SP1 and Exchange 2003 SP2.
The following recipient(s) could not be reached:
email@example.com on 4/24/2006 11:16 AM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<mail2.econo.com #5.7.1 smtp;550 5.7.1 <firstname.lastname@example.org>... Relaying denied>