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Re: [ietf-smtp] SPF DNS query limits

2016-05-24 11:58:37

On May 24, 2016, at 9:23 AM, John Levine <johnl(_at_)taugh(_dot_)com> wrote:

BTW - do these companies just add all the IP addresses they own to their 
SPF records? Do Google really have ~230,000 mail servers?

No, but they certainly have thousands, way too many to enumerate in SPF 

Just as a matter of interest - wouldn't it be worth them using macros in 
their includes? eg 'include:%{i4r}'. This could cut down 
drastically on the level of nesting.

Yuck.  That feels really fragile.

There are (at least two?) companies trying to monetize SPF macros. It'll
be interesting to see what happens.


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