Topic Last Modified: 2006-05-03

The Microsoft® Exchange Server Analyzer Tool queries the ExchangeLink Windows® Management Instrumentation (WMI) class to determine the value of the StateFrozen key for the Simple Mail Transfer Protocol (SMTP) Local Delivery queue.

If the Exchange Server Analyzer finds that the value of the StateFrozen key for the Local Delivery queue on an Exchange server is set to True, the Exchange Server Analyzer displays an error.

A frozen queue means the transport sessions for that queue are stopped. A frozen queue prevents outgoing messages, although new messages can be added. You can manually change the state of a connection by using the shortcut menu on each link queue. When you use the Force Connection command to change a queue state to Active, you immediately enable a connection that sends the messages from that queue.

The Local Delivery queue contains messages that are queued on the Exchange server for local delivery to an Exchange Server mailbox or public folder store.

Messages can accumulate in this queue if the Exchange server is not accepting messages for local delivery. Slow or intermittent message delivery can indicate a looping message or a performance problem.

To resolve this error, increase diagnostic logging for the MSExchangeTransport service to collect information about categorizer components.

For more information about how to modify logging settings, see "How to Modify Logging Settings for MSExchangeTransport" in the "Troubleshooting Mailflow and SMTP" section of the Exchange Server Transport and Routing Guide (

For more information about how to troubleshoot SMTP queues, see the following Exchange resources: