Source : Free On-Line Dictionary of Computing

keypal
     
        The {electronic mail} equivalent of a pen pal - someone with
        whom to exchange electronic mail for the simple joy of
        communicating.
     
        {Request for keypals
        (gopher://wealaka.okgeosurvey1.gov/11/K12/keypals)}.
     
        [Is there some kind of central clearing-house for requests on
        the net?]