When an e-mail is sent to a specific external e-mail address (say... email@example.com) the exchange server will bounce back the e-mail. The e-mail address is valid. Any e-mail sent to firstname.lastname@example.org will not send - to anyone else on the TO: or CC: (the message does not leave the server)
The bounce back msg says:
"You do not have permission to send to this recipient. For assistance, contact your system administrator.
When I track the email in the Tracking Center the message history says:
Report Generated Internally
Report delivered to UserName
Any ideas? Thanks.