SBS 2003 Mailbox Stores

The Echange portion of SBS 2003 is slowing eating up my server hard drive space beyond resonable limits and I do not see what can be done to it.

The Mailboxes show an unbelievable number of email messages stored. When I check using Outlook 2000 and through the Outlook Web Access I can only find a total of 367 messages and the Deleted Folder has been emptied, first thing I checked.

But, when I check the Mailbox through Exchange Server Management it shows 2,967 messages stored??? How can I open and/or delete the extra 2,600 messages?