Upgraded from office 2003 to Office 2007. Certain e-mails which have large distribution lists continue to populate the inbox (like 12,000 plus copies of the same e-mail). When I log into the web interface I can see the single e-mail in the inbox, but it is never removed. If I delete the duplicating message from the server via the Web interface I stop getting the duplicate messages on the Outlook 2007 client.