Re: [dmarc-ietf] Nonexistent Domain Policy was: Re: Working Group Last Call: draft-ietf-dmarc-psd
"Kurt Andersen (b)" <kboth@drkurt.com> Fri, 19 July 2019 15:30 UTC
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From: "Kurt Andersen (b)" <kboth@drkurt.com>
Date: Fri, 19 Jul 2019 08:30:01 -0700
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To: Scott Kitterman <sklist@kitterman.com>
Cc: "dmarc@ietf.org" <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] Nonexistent Domain Policy was: Re: Working Group Last Call: draft-ietf-dmarc-psd
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On Thu, Jul 18, 2019 at 10:42 PM Scott Kitterman <sklist@kitterman.com> wrote: > On Thursday, July 18, 2019 11:42:36 AM EDT Kurt Andersen (b) wrote: > > On Wed, Jul 17, 2019 at 7:35 PM Scott Kitterman <sklist@kitterman.com> > > > > Most MTAs will also follow CNAMEs. Should they be included (along with > > other things like DNAME records) within the scope of existence? I'm a > > little concerned that we are making a special definition of > "non-existence" > > which differs from the standard DNS concepts of NODATA and NXDOMAIN > without > > having a correspondingly special name. > > OK. I wish you'd jumped in earlier when we were discussing that exact > topic. > > https://mailarchive.ietf.org/arch/msg/dmarc/44sVJzvPkXkdT7Np-0ANr9Wm2Zc > > If we want to take another run at this and put it in more standard DNS > terminology, then maybe: > > .... a domain for which there is an NXDOMAIN or NODATA response for A, > AAAA, > and MX records. > > I think that cures John's concern with my last proposal and addresses > yours as > well (the response to a CNAME/DNAME is not NODATA/NXDOMAIN, so they are > correctly followed). > Yes - I think that will fix my concerns (and John's too). > > I'm also concerned > > that a wildcard null MX record at the org level would end up having all > > subdomains "exist", but the policy that should be applied would be the > more > > restrictive "np" policy, not the (possibly) more permissive "sp" policy. > > I think this is one of those "you must be this tall to ride on this ride" > situations. DNS comes equipped with multiple footguns and you have to > know a > bit about what you're doing to make sure you get the effects you're after. > Perhaps a reminder in the text related to "np" that wildcards may cause undesired results and leave it as an exercise for the implementor to learn from that warning. --Kurt
- [dmarc-ietf] Working Group Last Call: draft-ietf-… Murray S. Kucherawy
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Seth Blank
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Seth Blank
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Kurt Andersen (b)
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Scott Kitterman
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Alessandro Vesely
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Hollenbeck, Scott
- Re: [dmarc-ietf] Working Group Last Call: draft-i… John Levine
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Scott Kitterman
- [dmarc-ietf] Introduction context was: Re: Workin… Scott Kitterman
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Scott Kitterman
- Re: [dmarc-ietf] Introduction context was: Re: Wo… Hollenbeck, Scott
- Re: [dmarc-ietf] Introduction context was: Re: Wo… Scott Kitterman
- [dmarc-ietf] Mention ICANN/operational limitation… Scott Kitterman
- [dmarc-ietf] Nonexistent Domain Policy was: Re: W… Scott Kitterman
- [dmarc-ietf] Implemnetations was: Re: Working Gro… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Kurt Andersen (b)
- Re: [dmarc-ietf] Mention ICANN/operational limita… Stan Kalisch
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Seth Blank
- Re: [dmarc-ietf] Mention ICANN/operational limita… Dotzero
- Re: [dmarc-ietf] Mention ICANN/operational limita… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Mention ICANN/operational limita… Hollenbeck, Scott
- Re: [dmarc-ietf] Mention ICANN/operational limita… Stan Kalisch
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… John Levine
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Dotzero
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Introduction context was: Re: Wo… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… John Levine
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Mention ICANN/operational limita… Alessandro Vesely
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Alessandro Vesely
- Re: [dmarc-ietf] Mention ICANN/operational limita… Scott Kitterman
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Mention ICANN/operational limita… Alessandro Vesely
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Alessandro Vesely
- Re: [dmarc-ietf] Mention ICANN/operational limita… Tim Wicinski
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Ian Levy
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Tim Wicinski
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Richard C
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Alessandro Vesely
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Chudow, Eric B CIV NSA DSAW (USA)
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Ian Levy
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Seth Blank
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Seth Blank
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Working Group Last Call: draft-i… Murray S. Kucherawy
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Tim Wicinski
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Chudow, Eric B CIV NSA DSAW (USA)
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Kurt Andersen (b)
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… John Levine
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Kurt Andersen (b)
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Kurt Andersen (b)
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Ian Levy
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Dotzero
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Kurt Andersen (b)
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Kurt Andersen (b)
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Tim Wicinski
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… John Levine
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Ian Levy
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Alessandro Vesely
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Alessandro Vesely
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Douglas E. Foster
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Scott Kitterman
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Dotzero
- Re: [dmarc-ietf] Nonexistent Domain Policy was: R… Kurt Andersen