A POP3 e-mail account is a special kind of e-mail account that comes with a login and password. These kind of e-mail accounts use the Post Office Protocol version 3 (hence the name POP3). A POP mail account is where all your messages are sent and received from. If you are the only person maintaining the site, 1 POP mail account will do . However, lets say you are the webmaster and another person is for support. You would want to have 2 separate POP mail accounts. You can create as many POP mail according to your plan.
POP3 stands for Post Office Protocol version 3, which is the generally accepted protocol used for authentication and downloading e-mail.