Use Diagnostic Logging

You can use diagnostic logging to record significant events relating to authentication, connections, and client actions. Diagnostic logging for POP3 is written to the Windows 2000 event log and is set on the server hosting the POP3 virtual server instance. If multiple POP3 virtual servers are added to one Exchange computer, all POP3 virtual servers are logged at the level set on the host server. By default, a logging level of None is selected to log only critical errors.

To set the logging level:

1. Start System Manager
   on the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. Navigate to a server.

   System Manager

   1. Administrative Groups
   2. Administrative group
   3. Servers
   4. Server
3. In the console tree, right-click a server, and then click Properties.
4. On the Diagnostic Logging tab, in Services, click POP3Svc.
5. Click a Category, and then select one of the following Logging Levels:
   • None. This level logs only critical and errors.
   • Minimum. This level logs high-level events by writing one entry for each major task performed by the service. This level of logging can help identify where a problem might be occurring.
   • Medium. This level records entries for each step taken to run a task. This level of logging gives more detail once the location of the problem is found.
   • Maximum. This level records entries for each line of code in the service, providing a complete trail of the service's operation and logging all events. This level of logging creates a large amount of data, which can affect server performance.