On Tue, 26 Apr 2011 13:22:15 +0100, Alessandro Vesely
<vesely(_at_)tana(_dot_)it>
wrote:
I guess Message-ID is among those "structural, not semantic" fields.
I concur. However, we miss a field that says an MTA is _knowingly_
breaking whatever signatures may be present.
The Message-ID gets copied into the References of replies. I can imagine a
situation where a scammer changed the Message-ID in order to make a
message appear in the wrong thread (most MUAs try to display messages in
threads, and do it in a sufficiently similar manner that such a scam might
work).
The same might even be true of Content-Type (though the scammer would have
to be pretty smart to dream up a viable mechanism). But, sadly, scammers
ARE smart :-( .
--
Charles H. Lindsey ---------At Home, doing my own thing------------------------
Tel: +44 161 436 6131
Web: http://www.cs.man.ac.uk/~chl
Email: chl(_at_)clerew(_dot_)man(_dot_)ac(_dot_)uk Snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, U.K.
PGP: 2C15F1A9 Fingerprint: 73 6D C2 51 93 A0 01 E7 65 E8 64 7E 14 A4 AB A5
_______________________________________________
NOTE WELL: This list operates according to
http://mipassoc.org/dkim/ietf-list-rules.html