We have an issue where the POP3 virtual server stops responding. This happens around twice a month. To resolve we perform an IISRESET as this appears to be the best way to get the POP3 service to stop and start correctly.
There were no errors logged at all in system or application logs. To investigate this I enabled maximum logging for all categories of the POP3SVC. This produced the following event documented at Microsoft Technet:
Thats fine but the service is running as I can telnet port 110 and get a response but not the normal "ready" response (annoyingly I can't recall what the response was! It was a few weeks ago when I last dealt with this issue).
I want to know if there is any way of identifying WHY the virtual server instance hangs/freezes or becomes unresponsive. Is there any other logging I can enable to highlight issues?
We are running SBS2003 SP2 with Exchange SP2.