Re: [spf-discuss] SPF, DKIM, and NIH

On Tue, 6 Oct 2009 19:54:55 -0700 (PDT) Michael Deutschmann 
<michael(_at_)talamasca(_dot_)ocis(_dot_)net> wrote:
...
> But, the reason DKIM-ADSP suffers mailing list FPs is not because of any
> deficiency in its cryptographic approach.  It's only because it tries to
> guard the header from (From:), rather than the envelope sender (MAIL
> FROM:), that it has this problem.  Meanwhile, its cryptographic approach
> does well at avoiding traditional-forwarder FPs.
> ...
This is exactly backwards.  Body From is preserved by mailing lists.  The 
reason mailing lists are a problem for ADSP is most mailing lists modify 
the message in ways the break the signature so the signature is lost.

Scott K


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