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

Alessandro Vesely wrote:

> > > 2) Do you [think to] publish that data?
> > Yep. I imagine that sender reputation services will become as 
> > widespread as IP reputation services. Maybe that's what you mean by a 
> > "worldwide individual identity system"? In which case, the answer is 
> > yes. However, it may only be necessary to publish individual 
> > addresses with scores that differ greatly from the domain default; 
> > known spammers or well behaved bulk senders.
> 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.  It's a "competitive advantage" buried deep in a 
complex product advertising lots of other bells and whistles.  
Accumulating such data is not difficult, however.  Even small domains, 
like mine and Stuart's are quite successful at it.  My data is publicly 
available, and if anyone is interested, I will help set up a similar 
system for their domain.
-- Dave



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