Daniel Erat posted this objection:
The RMX proposals that I've seen appear to be concerned solely with
forged MAIL FROM addresses (as described in RFC 821). I believe that
most MUAs that are in widespread use only display From: headers (as
described in RFC 822), and the majority of end-users are not aware of
the existence of anything else.
Good point, Daniel. I have added a note about this here:
http://www.mikerubel.org/computers/rmx_records/#notes_internalfromheader
Mike
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