In Mac OS X Mail, how do I display and send the full headers of an email message?

In Mac OS X Mail, to send the full headers of an email message you have received, you must first display the headers:

• In Mail 1.3 for OS X 10.3.x (or later), select the message and then, from the View menu, select Message and then Long Headers.
  
  
• In Mail 1.2.5 for OS X 10.2.x (and earlier), select the message and then, from the View menu, select Show All Headers.

To send the full headers in an email message, with the headers displayed, from the Message menu, select Forward, Forward Message, Reply, or Reply to Sender, as appropriate. Mail will include the headers along with the message in the quoted text in your message.

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