We're running Exchange 2000 Enterprise on a Windows 2000 server. Small office. Since Sunday last, some of our Exchange services, including WWW publishing have been shutting themselves off. The services that go down are: MS Exchange IMAP4, MSExchange Pop3, MS Exchange Routing Engine, Simple Mail Transport Protocol, World Wide Web Publishing Service. Has anyone seen this before? Any thoughts on what might be causing it? Anything to do with Symantec? Thanks. Jan Mt Pleasant Strategies for the Global Environment 2101 Wilson Blvd. Arlington, VA 22201