Re: misconception in SPF

"John Levine" <[email protected]>
Newsgroups gmane.ietf.asrg
Message-ID <[email protected]> 
>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?
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