What is POP?
POP (Post Office Protocol) is the most recent version of e-mail software. It is a client/server protocol in which e-mail is received and held for you by your Internet server. Periodically, you (or your client e-mail receiver) check your mailbox on the server and download mail. POP3 is built into the Netmanage suite of Internet products and one of the most popular e-mail products.