Currently we are having an issue with 1 users Outlook account. This user is no longer recieveing email and a message keeps popping up saying his mailbox is full. He has over 2GB of e-mail but we have no restrictions in place on how large in GB a user's mailbox can be. In fact we have another users whose mailbox is 3GB. This user that is having the issue though does have a very large number of items. His total number of items is 20,123, far more than any other user in our organization. I wanted to know if this could be the cause of the problem? Can Outlook or Exchange only support a certain number of items? Or could there be something else causing this?