A mailbox access protocol defined by IETF RFC 3501. IMAP is one of the most commonly used mailbox access protocols. IMAP offers a much wider command set than POP.
Source(s):
NIST SP 800-45 Version 2
A method of communication used to read electronic messages stored in a remote server.
Source(s):
NIST SP 800-101 Rev. 1
NISTIR 7250
under Internet Message Access Protocol
a method of communication used to read electronic mail stored in a remote server.
Source(s):
NISTIR 7387
under Internet Message Access Protocol