There have been no changes to the Exchange Server 2003 portion of SBS 2003 and now this morning our clients can't send mail to us and receive the following message. We were able to receive mail on Friday but not by Monday morning. The server has been rebooted and there are no erros in the event log. What could have happened?
The following recipient(s) could not be reached:
firstname.lastname@example.org on 6/26/2006 1:26 PM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<arkaysystems.com #5.7.1 smtp;550 5.7.1 <email@example.com>... Relaying denied: You must check for new mail before sending mail.>