Our exchange server 2000 was working fine till to wensday afternoon.Then it started working slow.Then I got lots of emails (incoming and outgoing) frozen in queues. I checked the server with Virus Killer and spyware I couldn't locate anyone. Then I tried to start and stop smtp service. so some of emails got delivered (a few)and some didn't ( lots of them ). I even deleted all emails from queues the restared Server. But no result, again I got lots of new emails frozen (marked frozen). I tried unfreeze command but it didn't helped. any idea or help would be appreciated.