mail user agent
<messaging> (MUA) The program that allows the user to compose and read
electronic mail messages. The MUA provides the interface between the user and
the Message Transfer Agent. Outgoing mail is eventually handed over to an MTA
for delivery while the incoming messages are picked up from where the MTA left
it (although MUA's running on single-user machines may pick up mail using POP).
Popular MUAs for Unix include elm, mush, pine, and RMAIL.
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mail user agent » Mail Users' Shell » MAINBOL »
Main Distribution Frame