POP3

This is a computing standard that enables emails to be retrieved from a remote mailbox. That is, it allows you to collect emails from an account that you have on another computer (called a server, or host) to your own email software, such as Outlook, Netscape Messenger, Eudora, Exchange, etc.

With Post Office Protocol version 3 (POP3) your mail is saved for you in your mail box on the mail server. When you read your mail, all of it is immediately downloaded to your computer and no longer maintained on the mail server.