I linked my outlook.com account to my Outlook 2007 via POP3 and checked the box to leave mail on the server after I delete it from Outlook. The issue is, every two or three days, Outlook.com resends all the mail it had previously sent to my desktop Outlook.

This started happening in the last 10 days or so. Before that, the account had been working well. Any suggestions on how to fix this? Thank you.