POP3

Diagnostics logging service	Diagnostics logging category	Description
MSExchangeIS	Content Engine	Events related to converting messages from the database format of the information store to the formats required for POP3.
MSExchangeIS	Connections	Events related to connecting and disconnecting e-mail clients.
MSExchangeIS	Authentication	Events related to e-mail client logon and password authentication.
MSExchangeIS	Client Actions	Events that log the POP3 protocol commands issued by clients.
MSExchangeIS	Configuration	Events related to configuration problems.