There are approximately 20 users in my company; all are using Outlook XP or Outlook 2000. One person is having consistent problems receiving e-mail; send/receive status hangs at 50% or so and then eventually times out. Some messages do trickle in. He was using Outlook XP and I found that there is a known bug that may cause mail delivery to "hang"; I upgraded him to Outlook 2003 and he is still having the same problems. Server is running Windows 2000. I am consistently receiving warnings in the event log of the server stating "DNS registration failed because there is no DNS server available"; could this have something to do with the mail delivery problems? I tried an offline defragmentation and his mail seemed to work fine for a week or two; now it's back to having problems again. Any ideas as to what could be causing this and how to fix it?? Please help.....I have no idea what to do.