I have been facing the subject problem for a long time now. I have a windows 2000 and exchange server 2000 with service pack 2. I am also using scanmail for exchange. Once in a week my exchange server stops functioning and the users are not able to send and receive emails. when i open to check the system manager under protocols i see a red cross on default pop3, smtp, http virual server. I have to restart my server every time i face this problem, then it works. I checked the event viewer and find out this description: 1) Event: Source: POP3SVC Type : Warning Event ID : 1036 Description: An error occurred while starting the Microsoft Exchange POP3 Service: server instance number 1 failed to start with error 0x2740 2) Event: Source: SMTPSVC Type : Error Event ID: 115 Description: The service could not bind instance 1. The data is the error code. For additional information specific to this message please visit the Microsoft Online support located at: http://www.microsoft.com/contentredirect.asp some one could tell me what the problem is?