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.

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Last updated: 2007-03-07

Nearby terms:

post office problem ♦ Post Office Protocol ♦ post-order traversal

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