On 4/23/2010 6:50 AM, MH Michael Hammer (5304) wrote:
> If John is making some assertion of responsibility for his message by
> signing, what is the limit of his responsibility as the message flows through
> the ecosystem? Where is the RFC that says his signature should be stripped?

Most importantly, where is the specification that says a DKIM signature 
overrides The MailFrom address?


> If the list stripped his signature and someone modified what he wrote is this
> a failure of DKIM or is it something else? What are we collectively (and
> individually) trying to achieve if we are signing the body and not just the
> headers?

If a list already knows it should strip DKIM signatures, isn't also likely that 
the list will be able to sign?

We have no empirical data that the presence of a list signature AND an author 
signature will produce the wrong results (for some definition of wrong.)


> When the person hit the "this is SPAM" button were they referring to John's
> message or were they referring to mail from the list? How do we know?

good questions.


> If there were more than one valid signature on the message where would Yahoo
> send the report?

We should ask Yahoo.


> Where should Yahoo send the report?

Yup.


d/
-- 

   Dave Crocker
   Brandenburg InternetWorking
   bbiw.net
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