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Re: [dmarc-ietf] I-D Action: draft-ietf-dmarc-dmarcbis-07.txt

John Levine <johnl@taugh.com> Wed, 20 April 2022 16:25 UTC

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Date: Wed, 20 Apr 2022 12:25:40 -0400
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From: John Levine <johnl@taugh.com>
To: dmarc@ietf.org
Cc: dougfoster.emailstandards@gmail.com
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dmarc/8L90PP6dys6bGBiFD-K35TqoQGc>
Subject: Re: [dmarc-ietf] I-D Action: draft-ietf-dmarc-dmarcbis-07.txt
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It appears that Douglas Foster  <dougfoster.emailstandards@gmail.com> said:
>-=-=-=-=-=-
>
>Glad to have your opinion on this.   What is your process for determining
>whether a private registrar's clients use their subtree for mail?  

Look at them and see if they'd be plausibly be used for mail. Those
Amazon subtress are names they use for random hosts in the AWS cloud.
I don't think Amazon lets you send direct port 25 mail without making
other arrangements, and even if anyone did, I don't care because it
makes no business sense for anyone to use those subdomains for mail.

If you do want to send mail from AWS cloud hosts, there are plenty of ways to
do it, but they don't involve sending mail with domain names like
bob.s3.dualstack.eu-central-1.amazonaws.com

R's,
John

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