On 24 Sep 2010, John R. Levine wrote:
Good point. So it's two things, lists should sign outgoing mail, and
discard any incoming mail with dkim=discardable.
One thought - If lists are going to spend any time paying special
attention to DKIM, it would be easier for them to just always rewrite the
headers like so:
From: Joe User <i-use-discardable(_at_)example(_dot_)org>
becomes
From: Joe User (i-use-discardable(_at_)example(_dot_)org) <x(_at_)invalid>
And thus avoid any problems no matter what the original sender's policy
is.
(Ok, it will silently break take-address-from-message features in the mail
client. Adding a Cc: header listing the original From: address would
help with that.)
The fact that this would work brings up a separate flaw in DKIM that I
believe has been mentioned before. There's not much of a solution to
it, though.
---- Michael Deutschmann <michael(_at_)talamasca(_dot_)ocis(_dot_)net>
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