[W/K] :: Mail User Agent

  mail user agent
       
           (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.
       
          FAQ
         
       (http://www.cis.ohio-state.edu/hypertext/faq/usenet/mail/setup/unix/part2/faq-doc-3.html).
       
          (1996-03-21)