Event ID - 1040

Event Id1040
SourcePOP3SVC
DescriptionAn error occurred while starting the Microsoft Exchange IMAP4 Service: the call to InitCommonDlls() failed with error 0x6b0.
Event InformationWhen you try to start the IMAP4 service or the POP3 service on an Exchange 2000 server, the services do not start, and you see above event along with a IMAP4SVC event in the Application event log.
CAUSE :
This problem can occur if Microsoft Site Server is also installed on the Exchange 2000 server. 
WORKAROUND :
Stop the Microsoft Site Server service, and then start the IMAP4 and POP3 services. 
MORE INFORMATION :
Microsoft recommends that you do not install Site Server on the same server as Exchange 2000.
Reference Links Event ID 1040 Is Written to the Application Log When the IMAP4 and POP3 Services Start

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