On Tuesday, January 20, 2015 17:40:39 Franck Martin wrote:
> ----- Original Message -----
> 
> > From: "Scott Kitterman" <[email protected]>
> > To: [email protected]
> > Sent: Tuesday, January 20, 2015 2:49:01 PM
> > Subject: Re: [dmarc-ietf] ... and two more tiny nits, while I'm at it
> > 
> > 
> > 
> > 
> > Last time I had stats, it was about 10% as common as Mail From oriented
> > records.  Much less common, but I wouldn't say rare.  When done this way,
> > there isn't a singe "SPF" result, there are two: SPF/Mail From and
> > SPF/HELO. Only SPF/Mail From is relevant to DMARC.
> 
> Why do you say that?
> 
> DMARC takes the result from SPF (pass/fail/...) and the string that SPF used
> for this result be it mail from or helo, to check for alignment.
> 
> Did I miss something?

DMARC takes the SPF result and the Mail From as an input (which in the case of 
a null Mail From is a synthetic Mail From built using HELO, but that's just a 
coincidence).  SPF isn't just a result (pass, fail, etc), it also has a domain 
and a related identity.

Scott K

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