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

David MacQuigg wrote:
> > > I imagine that sender reputation services will become as 
> > > widespread as IP reputation services.
> > If the domain cooperates, they would take steps so as to stop those 
> > [ab]users. In such case, while publishing all the data may still be 
> > useful for checking the veracity of your activity, only your word 
> > about the domain's cooperation is strictly necessary. I'd call such 
> > activity vouching for that domain, in rfc5518's sense.
> Domain reputation data is rarely published, because it is the key 
> ingredient in a commercially successful spam-blocking service.  Most 
> services that rely on reputation, try to not even let customers know 
> what they are doing.
Then that's snake oil, IMHO. A similar argument should hold for X.509 
server certificates: Those who don't say what checks they carry out, 
presumably don't actually check anything.


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