I'm going to begin using IMAP versus POP for my Gmail. Many thousands of messages are in my Outlook 2010 and online with Gmail. I thought these emails had been deleted using the settings "delete messages on server after 60 days" within but for some reason they weren't deleted. I would like to keep the folder structure I've developed within Outlook.
I'll be deleting the account on my Outlook (keeping the .pst and current emails in tact) then adding the account using IMAP. I plan to then drag the folders over to the IMAP account. My question is, there will be lots of duplicate messages. Is there a way to delete duplicates or is Gmail smart enough to know this message already exists and just not copy it? Thanks in advance.