spf-discuss
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[spf-discuss] Re: SPF -all domain survey

2007-12-10 08:05:28
Stephan Seitz wrote:

for privacy reasons i'm unable to hand out a list of domains

Publishing a sender policy makes it public, but of course you
won't hand out a list of your clients.  You could tell them
where they can submit their domain if they want to be counted.

is there any advantage of having such a list publically 
available?

As info for admins who dare not publish -all it might help
to convince them that others survived the experience.

As info for spammers "do not abuse these domains, they are
protected by SPF FAIL" it could in theory also help (?)

As statistics about hardcore SPF adoption it's interesting.

SPF without FAIL can still offer PASS, that's better than
nothing for receivers (= "can accept and bounce later").

PASS could be also be used in scoring with white lists or
other reputation systems (e.g. DAC-VBR).  SPF without PASS
*and* without FAIL is pointless, but the simple statistics
for the top 500 Alexa sites (and others) counts anything
starting with "v=spf1 ", even a dummy "v=spf1 ?all".

 Frank

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