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Re: [dmarc-ietf] ARC vs p=quarantine

John Levine <johnl@taugh.com> Sat, 19 December 2020 19:50 UTC

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From: John Levine <johnl@taugh.com>
To: dmarc@ietf.org
Cc: vesely@tana.it
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Subject: Re: [dmarc-ietf] ARC vs p=quarantine
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In article <1e61f7c4-c6d2-5dab-dfc7-f1fd740e1d0d@tana.it> you write:
>Now my tiny MX stores 115,225 domains total.  And I have no idea how I could 
>add a trust-ARC-seals boolean field to each domain record.

You wouldn't.  Only a small fraction of those domains send enough forwarded
mail to be worth worrying about.  We know we need some sort of shared list
of plausible forwarders but I would be amazed if it were anything like 115K
domains.

R's,
John

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