Including the Last Message Sent in a New Message (no
  editor)

  Choose Include Last Sent (no editor) from the Create-Send
  window's File menu to insert a copy of the last message
  you sent during this Mail session into the message you are
  creating.

  To include the last sent message in a new message without
  using an editor:

  1.  Choose Include Last Sent (no editor)...  from the Create-

      Send window's File menu.
      Mail displays the last message you sent, including the
      header information, in the message area of the window.

  2.  Enter the address information in the envelope area of the
      window.

  3.  Click on the Send button to send the message.

  Additional topics:

  *   Using a Create-Send Window