Re: [Asrg] misconception in SPF

"John Levine" <johnl@taugh.com> Mon, 10 December 2012 00:12 UTC

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Date: Mon, 10 Dec 2012 00:11:57 -0000
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From: John Levine <johnl@taugh.com>
To: asrg@irtf.org
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Subject: Re: [Asrg] misconception in SPF
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>There is no way for the owner of the overlying domain (who also owns
>the subdomain) to force such email to FAIL.  There should be a way to
>specify "all valid email from this domain and subdomains comes only
>from this set of IPs and no others" and SPF fails to provide one.
>That's a weakness in the structure of SPF which ought to be fixed.

How do you propose to implement it, other than tree climbing and gross
hacks like the public suffix list?