Monitoring the Dispatcher and Job Controller Processes

The Dispatcher and Job Controller Processes must be operating for MTA to work. You should have one process of each kind.

Symptoms of Dispatcher and Job Controller Processes Down

If the Dispatcher is down or does not have enough resources, SMTP connections are refused.

If the Job Controller is down, queue size will grow.

To Monitor Dispatcher and Job Controller Processes

Check to see that the processes called dispatcher and job_controller exist. See Check that the Job Controller and Dispatcher are Running.