A POP3 account works with any major email program (Outlook, Outlook Express, etc.). It can also be accessed from any Web Browser from anywhere in the world. Once you are logged in you can send, reply, forward, etc. just like from your computer.

What is the difference between a POP3 account and my regular email account?

Nothing really except the Bagpipers.com email account does not advertise your ISP (Internet Service Provider) but instead advertises you. Your POP3 account says @ Bagpipers.Com instead of @Earthlink.net or @AOL.com.