#mail  the bags of letters and packages that are transported by the postal service
  supertype:  #message  a communication (usually brief) that is written or spoken or signaled; "he sent a three-word message"
  part:  #missive
  subtype:  #1st_class__1stclas__first_class__firstclas__first-class_mail__firstclassmail__1st-class_mail__1stclassmail__priority_mail  mail that includes letters and postcards and packages sealed against inspection
     subtype:  #correspondence.1st_class__correspondence  communication by exchange of letters
  subtype:  #express_mail__expressmail__express__expres  mail that is distributed by a rapid and efficient system
     subtype:  #pony_express  express mail carried by relays of riders on horseback; especially between Missouri and California around 1860
  subtype:  #parcel_post  postal service that handles packages
  subtype:  #bulk_mail  mail consisting of large numbers of identical items (circulars or advertisements) sent to individual addresses at less than 1st-class rates
  subtype:  #third-class_mail__thirdclassmail__third_class  mail consisting of printed matter qualifying for reduced postal rates
     subtype:  #junk_mail  third-class mail consisting of advertising and often addressed to `resident' or `occupant'
  subtype:  #airmail  letters and packages that are transported by aircraft
  subtype:  #air_mail__airmail  mail that is sent by air transport
  subtype:  #surface_mail__surfacemail  mail that is sent by land or sea
  subtype:  #registered_mail__registered_post  mail that is registered by the post office when sent in order to assure safe delivery
  subtype:  #special_delivery__specialdelivery  mail that is delivered by a special carrier (for an additional charge)

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