Definition: POP3 (Post Office Protocol v3): This is the most popular protocol for picking up e-mail from a server. The e-mail client program will open a connection to port 110 on the server, then pull down each e-mail message from the server. Key point: Since e-mail is one of the most popular services on the Internet, there are a huge number of different implementations of POP3 services. From Hacking-Lexicon
POP3 (Post Office Protocol v3)
By Juergen Haas, About.com Guide
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