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Re: [dmarc-ietf] non-mailing list use case for differing header domains

John R Levine <johnl@taugh.com> Wed, 12 August 2020 22:21 UTC

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Date: Wed, 12 Aug 2020 18:21:09 -0400
Message-ID: <767c6a11-34c5-b4e6-a8ad-5925e7c01bf2@taugh.com>
From: John R Levine <johnl@taugh.com>
To: Neil Anuskiewicz <neil@marmot-tech.com>
Cc: dmarc@ietf.org
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Subject: Re: [dmarc-ietf] non-mailing list use case for differing header domains
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> I do think that sometimes people don’t take p=reject seriously enough, and don’t realize how much time and monitoring and prep it takes. I mostly work with smaller entities but I advise staying at  p=none of the time unless there’s spoofing. Otherwise, it’s reporting only, watch the reports, and take action if and only if there’s a problem.

Completely agree.  I have 240,000 aggregate and 80,000 failure reports in 
my database and I'm still publishing p=none for all my domains that 
actually send mail.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

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