Delivery has failed - Exchange 2007
Keep getting this message for this user. It only happens when certain other members of staff send her a message. All the other members of staff are using full Outlook 2007. Web Outlook is working fine, and she is getting most of her mail. Everything seems correct on the server.
Delivery has failed to these recipients or distribution lists:
The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator.
If I click the link in the e-mail it shows the following details:
Anyone got any ideas why it would keep doing this?