Difference between IMAP and POP3 email accounts

IMAP (Internet Message Access Protocol) and POP3 (Post Office Protocol) are the two options for setting up your email account using an email client (Outlook, Thunderbird, Entourage, Apple Mail, and others) or device (mobile phone or tablet). Each has its advantages and disadvantages, and your decision between the two will make a difference in the way your email is treated on our servers. For information on how to set up email to your mobile device, go to Set up iPhone email or Set up Android phone email.

IMAP

Note: IMAP accounts are the recommended option for customers that want to check email from multiple sources (home computer, work computer, mobile phone).

An IMAP email account will show all your emails and folders from the server on your device or in your email client. IMAP only shows messages from the server instead of removing them; when you use IMAP, an e-mail message is only removed from the email server when you choose to delete it. Your IMAP email account synchronizes your device or email client with the server.

POP3

Note: POP3 accounts are not recommended for customers that want to check email from multiple sources (home computer, work computer, mobile phone).

A POP3 email account pulls your email from the server and sends it to the specified device or email client. Once you have checked your messages via POP3, those messages are no longer on the server - they exist only on the computer or device from which you checked your email. You can change the default to keep a copy of the message on the server. If you choose to keep a copy on the server, you will need to be diligent in going to your account and removing unwanted messages from the server. This will prevent your mailbox size from reaching its capacity.