What is IMAP?
How do I synchronize my mail?
We live in the day of multiple devices accessing a single email account. We use our computer, smart phones, sometimes even a laptop all to get to the same account. Yet many of us are setup with the wrong type of mail system for that, and can be using something better: IMAP.
Instead of POP mail, using IMAP allows us to synchronize all of our devices, so messages deleted from the computer are automatically deleted from the phone.