Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

A  |  B  |  C  |  D  |  E  |  F  |  G  |  H  |  I  |  J  |  K  |  L  |  M  |  N  |  O  |  P  |  Q  |  R  |  S  |  T  |  U  |  V  |  W  |  X  |  Y  |  Z

Post Office Protocol (POP)

Definitions:

  A mailbox access protocol defined by IETF RFC 1939. POP is one of the most commonly used mailbox access protocols.
Sources:
NIST SP 1800-16B from NIST SP 800-45 Version 2
NIST SP 1800-16C from NIST SP 800-45 Version 2
NIST SP 1800-16D under Post Office Protocol from NIST SP 800-45 Version 2
NIST SP 800-45 Version 2

  A standard protocol used to receive electronic mail from a server.
Sources:
NIST SP 800-101 Rev. 1
NISTIR 7250 under Post Office Protocol
NISTIR 7387 under Post Office Protocol