Outlook 2010 (running on Windows XP Service Pack 3) keeps moving all of a user's emails in Inbox to the Deleted items folder.
The email account is set up using POP3.
Whenever we move the deleted emails back into the Inbox, they will once again be deleted (one by one) and moved to the deleted items folder. I have watched this happen several times.
There are no Outlook rules at all, Outlook and the computer have been restarted several times, and I have repaired the Outlook installation, and have disabled the "Keep emails on the server for 10 days" option.
Outlook 2010 is installed and Word, Excel, and Power Point 2003 are being used on this computer.
Yet this issue still continues to occur.
What can I do to fix this issue?