When I check the event log, the following errors are repeated every thirty minutes or so:
The Service Control Manager tried to take a corrective action (Restart the service) after the unexpected termination of the Microsoft Exchange Routing Engine service, but this action failed with the following error:
An instance of the service is already running.
The Microsoft Exchange Routing Engine service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 60000 milliseconds: Restart the service.
The Simple Mail Transfer Protocol (SMTP) service terminated unexpectedly. It has done this 1 time(s).
What is causing these failures? This is a server that was upgraded from nt4.0 and exchange 5.5.