Re: SPF I-D for review: draft-schlitt-spf-classic-00.txt

[Paul Vixie <paul@vix.com>]

> >> However, the load on the TLD servers could be greatly diminished by
> >> adding a TLD TXT record with a very high TTL.
>
> >no.  enough broken dns clients out there fail to cache anything at all,
> >positive or negative, that the presence of a TLD TXT RR would not slow
> >down the rate at which these queries were generated, or needlessly and
> >endlessly repeated.
> 
> Yes it would.

no, actually, it would not.

> That there are some broken clients does not mean that all others will
> misbehave.

i didn't say all others would misbehave.  i said that the rate at which
these queries were generated, or needless and endlessly repeated, would
not be affected by the presence of a TLD TXT RR.

> And if you are lucky they even have a cache in front of them - but you
> assume that is broken too, I suppose - we have all seen repetetive
> queries on our servers.  Fine.  But it still has an effect for all
> correctly functioning implementations.  So I think you are
> exaggerating a little bit when you say plainly that it will have no
> effect.

the dominant effects will come from the people who don't cache.  for more
information on this, see all three papers at

	    http://dns.measurement-factory.com/writings/

> (and I still don't think it's a solution to a problem)

hopefully we're on the same page now.

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