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Re: [spfbis] #24: RFC 4408: Reasonable DNS error limits

Scott Kitterman <spf2@kitterman.com> Wed, 07 March 2012 12:24 UTC

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From: Scott Kitterman <spf2@kitterman.com>
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Date: Wed, 07 Mar 2012 07:24:50 -0500
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Subject: Re: [spfbis] #24: RFC 4408: Reasonable DNS error limits
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On Wednesday, March 07, 2012 03:47:52 AM Arthur Thisell wrote:
> > Section 10 says:
> >  SPF implementations MUST limit the number of mechanisms and modifiers
> >  that do DNS lookups to at most 10 per SPF check, including any
> >  lookups caused by the use of the "include" mechanism or the
> >  "redirect" modifier.
> 
> Good catch, Aleessandro.   That "lookups" should be "mechanisms or
> modifiers".   Can anyone think of a shorter/better term for the unwieldy
> "mechanism and/or modifier"?

FWIW, I think mechanisms and modifiers is correct.  You always have to count 
both, but sometimes the quantity of one of them is zero.  and/or just makes it 
more uncertain.

Scott K

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