ietf-dkim
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Re: [ietf-dkim] NEW ISSUE: Restriction to posting by first Author breaks email semantics

2007-12-10 08:05:41
Dave,

     The underlying problem is with coupling the From field to the
DKIM signature.  At most, the Sender value should be used.


It would indeed be nice to use the Sender field, but I would be
concerned about the Sender field not at least matching one of the
domains of one of the RFC2822.From lines, lest someone attempt to bypass
the tests by inserting a Sender.  But then we need an extra rule in the
state machine.  Perhaps it is better to explicitly deprecate multiple
From lines?  As UIs have developed they really don't index well against
multiple From lines anyway.

Eliot
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