POP3 and IMAP are two different protocols (methods) used to access email.

Of the two, IMAP is the better option - and the recommended option - when you need to check your emails from multiple devices, such as a work laptop, a home computer, or a tablet, smartphone, or other mobile device. Tap into your synced (updated) account from any device with IMAP.

POP3 downloads email from a server to a single computer, then deletes it from the server. Because your messages get downloaded to a single computer or device and then deleted from the server, it can appear that mail is missing or disappearing from your Inbox if you try to check your mail from a different computer.

To learn how to get your AOL Mail on your mobile device, please visit our help article AOL Mail: Mobile Mail.

To learn how to access your mail through a third-party email client (like Outlook, Mac Mail, etc.) please visit our help article How do I access my mail through a third-party email client?

Here are the differences between POP3 and IMAP.

POP3 - Post Office ProtocolIMAP - Internet Messaging Access Protocol
You can use only one computer to check your email (no other devices)You can use multiple computers and devices to check your email
Your mails are stored on the computer that you useYour mails are stored on the server
Sent mail is stored locally on your PC, not on a mail serverSent mail stays on the server so you can see it from any device.