On Wed, 04 Jun 2008 18:46:18 +0100, Douglas Otis
<dotis(_at_)mail-abuse(_dot_)org>
wrote:
This touches a significant issue. The rfc2822.From fields may contain
addresses that will _not_ resolve any DNS resource records for
protocols other than SMTP. For example, Microsoft Exchange was
initially based upon X.400 recommendations in the 1980s by the
Consultative Committee of International Telephone and Telegraph
(CCITT), now known as Telecommunications Standardization Sector of the
International Telecommunication Union (ITU-T). As a result, use of X.
400 addresses means it is fairly common to find email-address domains
that do not exist whatsoever within DNS. An NXDOMAIN result with
respect to an X.400 MS Exchange email-address is completely meaningless.
Then please could you provide us with a full example that could actually
happen, starting from an X.400 email that somehow got tranformed into an
RFC 2822 object that contained unresolvable domains, and which yet managed
to acquire a DKIM signature (not necessarily by anything in the From
header) and was also capable of being replied to by its recipient.
If such a beast can exist, then we need to take note of it, but i am not
aware that it could exist.
--
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