Post Office Protocol

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Post Office Protocol

[¦pōst ‚ȯf·əs ′prōd·ə‚ku̇l]
(computer science)
An Internet standard for delivering e-mail from a server to an e-mail client on a personal computer. Abbreviated POP.

Post Office Protocol

(messaging, protocol)
(POP) A protocol designed to allow single-user computers to retrieve electronic mail from a POP server via TCP/IP. The default port is 110.

The POP server might be a computer with a permanent Internet connection whereas its clients might only connect to it occasionally, e.g. by modem.

There are (in 1994) three versions: POP, POP2, and POP3. Later versions are NOT compatible with earlier ones.