Post Office Protocol

Introduction
The Post Office Protocol (POP) was first issued on October 1984. The protocol suggests a simple method for workstations to access mail from a mailbox server.
The protocol is dependent upon TCP (Transfer Control Protocol) and assumes that mail is posted by SMTP.
POP in more detail, is a way for a server machine to store and serve mail for various client machines that are not connected to the Internet 24 hours a day. This makes it like an electronic Post Office Box, where your email is held in the POP server until you login and retrieve it.
For example, if somebody sends you…