Re: [dmarc-ietf] Summary comments on draft-ietf-dmarc-psd

Alessandro Vesely <> Thu, 19 March 2020 11:41 UTC

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From: Alessandro Vesely <>
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Date: Thu, 19 Mar 2020 12:41:03 +0100
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Subject: Re: [dmarc-ietf] Summary comments on draft-ietf-dmarc-psd
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On Thu 19/Mar/2020 02:17:03 +0100 John Levine wrote:
> I do a hard reject of any mail with a nonexistent bounce address which I
> don't think is unusual.

How about nonexistent From: address domain?  Rejecting these is less usual (IME
because of although DMARC shifted the accent here.

> PSD as I understand it is to address the same issue the organizational
> domain does, but a level up, in a group of organizations that have
> some administrative connection.  The issue is people who publish A and
> MX records without covering DMARC records.  They're not supposed to do
> that but they do, and PSD is one way of figuring out who needs to fix what.

It also covers From:  That way we can reject on
nonexistent From: addresses for a subset of PSDs.