Source : Webster's Revised Unabridged Dictionary (1913)

Mail \Mail\, n. [F. maille, OF. also maaille, LL. medalia. See
   {Medal}.]
   1. A small piece of money; especially, an English silver
      half-penny of the time of Henry V. [Obs.] [Written also
      {maile}, and {maille}.]

   2. Rent; tribute. [Obs., except in certain compounds and
      phrases, as blackmail, mails and duties, etc.]

   {Mail and duties} (Scots Law), the rents of an estate, in
      whatever form paid.