I am having delayed emails to all our clients. Are setup is Exchange 5.5 with serice pack 4, NT 4.0 SP 5, NAV mse 2.1. The mail that arrives at the clients desktop cannot be viewed until the user interacts with outlook. Then 3 or 4 emails come at once. We were seeing this problem when we were running mapi/vapi in norton but after switching back to mapi only the problem disappeared forward a few weeks now it has retuned. This leads me to believe that it is not norton related. Has anyone got a clue?