Re: [dmarc-ietf] Comment on draft-ietf-dmarc-psd

"John Levine" <johnl@taugh.com> Sun, 08 December 2019 21:58 UTC

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Date: 8 Dec 2019 16:58:20 -0500
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From: "John Levine" <johnl@taugh.com>
To: dmarc@ietf.org
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In-Reply-To: <CADyWQ+HparFd6ubzr46mo63=oSrRqu1cjo0Xq=ZpERn+Yxx3=Q@mail.gmail.com>
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Subject: Re: [dmarc-ietf] Comment on draft-ietf-dmarc-psd
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In article <CADyWQ+HparFd6ubzr46mo63=oSrRqu1cjo0Xq=ZpERn+Yxx3=Q@mail.gmail.com> you write:
>So we could decide on doing a combinatory of #3 and #1, with the right
>mechanisms.

Publishing a list of PSD superdomains in the DNS is pretty trivial
using my dbound scheme, and should typically find out whether any name
needs a PSD check with one DNS query.  The total zone for the PSL is
under 10K records, so doing a local mirror should be easy, too.

R's,
John