Queue Issues
Microsoft Exchange Server 2007 will reach end of support on April 11, 2017. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
Applies to: Exchange Server 2007, Exchange Server 2007 SP1
The topics in this section help you diagnose and resolve problems that you may have with message queues in Microsoft Exchange Server 2007. The following topics will help you troubleshoot problems with messages stuck in mail queues and other mailflow issues:
Troubleshooting Outbound Mail That is Put in the Unreachable Queue on the Hub Transport Server
Messages Queue on an Edge Transport Server with 500 5.1.1 Unrecognized Command Error
Troubleshooting Mail Queues That Are Increasing on Edge Transport Servers
Troubleshooting Edge Transport Server Queues That Contain Mail Destined to a Hub Transport Server
Event Similar to Event ID 9514 May Be Logged in the Application Log