--On 29 July 2010 18:46:34 +0200 Alessandro Vesely <vesely(_at_)tana(_dot_)it>
wrote:
On 29/Jul/10 13:21, Charles Lindsey wrote:
The REAL cause of the problem is that From: line. My proposal is that MLM
should change the From: header in such a way that the mail appears to
have come from MLM.example and not from discardable.example. Clearly,
this removes the cause of the problem at a stroke (the mail will no
longer be discarded), but obviously it raises several other issues
instead.
SRS on "From"? It is intriguing that, after having taken a rather
different approach, DKIM faces much the same problems that SPF had
been criticized for, for the same minor fraction of the email traffic.
Actually, importantly, it's a *different* minor fraction of the email
traffic. Mailing lists that break DKIM headers will almost certainly
rewrite the envelope.
This is important, because it means that widespread deployment of DKIM
*and* SPF would mean that almost all legitimate email would either carry a
good DKIM signature, or pass SPF.
That means that the recipient should be able to make a judgement against
either a DKIM signer reputation engine, or a return-path email address
reputation engine, or an EHLO string reputation engine. I guess those
reputation engines might all be the same domain keyed machine, but they
could also encompass user-driven whitelists for authenticated email
addresses (return paths, From addresses with domain matches, etc).
--
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
For new support requests, see http://www.sussex.ac.uk/its/help/
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