Troubleshooting the message queue
When a message queue becomes too large, Symantec Messaging Gateway can become unresponsive or crash. To attempt to deter this issue, by default, Symantec Messaging Gateway defers new messages when the queue is full. As a best practice, you should leave this setting enabled and keep queue limits below the recommended default thresholds.
If you experience issues with the message queue, try the following:
- Make sure that your downstream delivery host is functioning and accepting mail.
- Configure the MTA to reject incoming messages.
- Watch and monitor the queues until they reach acceptable limits.
Repeat these measures until the issue is resolved.