How do I edit a message's headers?

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4.8. How do I edit a message's headers?

Sometimes you'll want to edit a message's headers before you send it--for instance, to add your own Return-Receipt-To: or Bcc: lines. There is no standard means of doing this; you'll need to read the documentation for your mail program. There are dozens of programs for sending mail and each one works differently.

In Elm, a wholly nifty mail program for UNIX systems, compose your message as usual. Before you send it, however, press the h key to edit the headers:

And now: Headers

e)dit message, h)eaders, c)opy, i)spell, !)shell, s)end, or
f)orget

Press u for user defined header:

Choose header, u)ser defined header, d)omainize, !)shell, or
<return>.
Choice: u

Then type your special header.

Enter in the format "HeaderName:
HeaderValue".
Return-Receipt-To: savetz@rahul.net

Now send your message as usual. Voil[ag]a!

And now Send

      e)dit message, h)eaders, c)opy, i)spell, !)shell, s)end, or
f)orget
Sending mail...

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