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Greg Hewgill wrote:

> http://spf-all.com

Hi, is your (roughly) 1 of 25 millions result
one million FAIL-domains out of 25 millions
*tested*, domains, or is it for 25 millions
with SPF policies, but no "-all" at the end ?

Frank

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On Wed, Jan 30, 2008 at 07:11:46PM +0100, Frank Ellermann wrote:
> Hi, is your (roughly) 1 of 25 millions result
> one million FAIL-domains out of 25 millions
> *tested*, domains, or is it for 25 millions
> with SPF policies, but no "-all" at the end ?

The 25 million is the total number of tested domains. I don't currently
keep track of how many domains publish any SPF policy at all, but I
probably should go back and do that. It would be interesting to know
overall SPF adoption numbers, regardless of policy.

Greg Hewgill
http://hewgill.com

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Greg Hewgill wrote:

> I probably should go back and do that.

Yes, domains without MX (first approximation) or more
precisely with neither MX nor an SMTP server at their
IPs could ignore spam / forgery / backscatter issues.

Maybe limit it to "have MX" and/or "have SPF" if you
want to get rid of "irrelevant" (wrt SMTP) domains.

Frank

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--On 30 January 2008 19:06:54 +0000 Greg Hewgill <greg@hewgill.com> wrote:

> The 25 million is the total number of tested domains. I don't currently
> keep track of how many domains publish any SPF policy at all, but I
> probably should go back and do that. It would be interesting to know
> overall SPF adoption numbers, regardless of policy.

Yes, that would be very useful.

An SPF pass for a trusted domain can be used to avoid spam filtering, so
even these records are worth checking for, but only if a large number of
domains have them. 4% is pretty good, but I'd guess that there must be more
than 10% out there if 4% actually use -all.

--
Ian Eiloart
IT Services, University of Sussex
x3148

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