Re: Re: Another Permerror heuristic

On Thu, 20 Mar 2008, Frank Ellermann wrote:

> Stuart D. Gathman wrote:
> 
> > In fact, this would be another tweak for SPFv3: only report
> > PermError for exactly 2 SPF records (v3 should not use TXT)
> > when the results disagree.  If both records get the same
> > result, that is an official result.
> 
> As heuristic it is an idea.  Generally I'd consider it as rude
> and net abuse when senders burden receivers with unnecessary
> DNS queries.  Receivers rejecting PermError should be free to
> consider such scenarios as broken.

Point taken.  So forget the idea for spfv3.  The goal for
my mail system is to get a semi-official pass so that I can blacklist
domains with a clear conscience. (And have whitelisting work reliably
even when sender has screwed up their DNS.)

-- 
	      Stuart D. Gathman <[email protected]>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.