Re: [spfbis] RFC7208 dual-cidr-length clarification

Jan Schaumann <jschauma@netmeister.org> Wed, 31 August 2022 20:48 UTC

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Date: Wed, 31 Aug 2022 16:48:26 -0400
From: Jan Schaumann <jschauma@netmeister.org>
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Subject: Re: [spfbis] RFC7208 dual-cidr-length clarification
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David BÃŒrgin <dbuergin@gluet.ch> wrote:
> I interpreted the syntax to allow all of
> 
> mx
> mx/24
> mx//64
> mx/24//64
> 
> for IPv4 or IPv6 CIDR prefix length, both, or neither. Right?

Yes, that is my current interpretation, too.  Note the
last line -- that is the one that seems... awkward?
Unexpected?

Looking at a few online validators, it seems that that
is indeed how it was implemented, so I guess at this
point the question whether that was intended is moot.
:-)

-Jan