Move mail from POP to IMAP

Hey,

I would like to move my email account over from POP to IMAP so that I can leave all my messages on the server and get them from my phone, Outlook etc etc, but how would I go about syncing mail back up to the server that I want to keep from Outlook?

Thanks :P

You can configure mail servers to not remove email from the server when you download it using POP, I'd suggest you contact your provider about it. However, emails that you already downloaded via POP and are no longer on there are near impossible to place back on the mail server, aside from forwarding them all to yourself :P