You can use IMAP (Internet Message Access Protocol) or POP (Post Office Protocol) connections with our email service, at the same time if desired.
The main difference between IMAP and POP is whether or not you want to download your email from the server:
If you are looking to use your webmail with only one computer or email client, it is best to use a POP account.
However, if you plan to use your email service with several different computers or mail clients and want to retain folders, read/unread status, etc. between them it is best to use an IMAP connection because it will better synchronize your info across multiple clients/devices.