[comp.mail.headers] \\\\\\\"forwarded mail format\\\\\\\"

adm.arpa%brl-adm.arpa%brl-adm.arpa@brl-adm.arpa (05/08/88)

I'm afraid you are out of luck. RFC822 does not describe the format of
forwarded mail, nor does it require that any information at all be supplied
as to the originator of mail. The only thing it requires is that the message
conform to standards in the header of the mail message. It doesn't even
have to be accurate!!! it just has to be there.

Sorry for the disappointment,
--jsol