Outlook 2013 / Windows 7 Pro 64
I recently switched from Outlook 2007 to Outlook 2013.
I have multiple email accounts and receive mail via POP3.
I use the same .pst file / Inbox for all of them.
After switching to Outlook 2013 I had the rather expected problem of lots of old emails being downloaded again. That phase is over now.
However, on some accounts I am receiving multiple copies of the same new emails.
I have tested this by sending myself emails to the one account I'm sure is doing this and I received, so far, 3 copies of the test.
The mail server is 3rd party and under my administrative control. I can see that the mail is not being forwarded to any of my other accounts. It only delivers mail to the given address.
Of course, I can "clean up" the Inbox of duplicates but that's a nuisance by itself.
I'd like to fix this while keeping my normal settings (as above) intact.
e.g. I get POP3 email on my cell phone too, and on my laptop and on this Outlook 2013 desktop.
Why would this suddenly be happening and what's the cure?