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Re: [dmarc-ietf] [EXTERNAL] Re: Ticket #64 - Contained Data PII Concerns

John R Levine <johnl@taugh.com> Fri, 12 February 2021 21:23 UTC

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From: John R Levine <johnl@taugh.com>
To: Seth Blank <seth@valimail.com>
Cc: "dmarc@ietf.org" <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] [EXTERNAL] Re: Ticket #64 - Contained Data PII Concerns
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> In the data itself, there are summaries of IP addresses and authentication
> statuses of mail that fall into three categories: 1) mail that is
> authenticated by the domain, 2) mail that fails to authenticate as the
> domain, and 3) mail that is wholly unauthenticated. From a domain owner
> perspective, this means they get reports of mail that is 1) authorized by
> them, 2) not authorized by them, or 3) broken by forwarding or other
> rewriting by an intermediary. ...

All true, but more to the point, the reports include IP addresses and 
domain names of mail servers and DKIM signers, not IP or e-mail addresses 
of individual users.  There's no PII other than in the extreme case that 
the domain has only a single user so all of the mail can be attributed to 
that user.

R's,
John

PS: updated the ticket title to say aggregate reports

PPS: that extreme case lets me tell things like how many NANOG subscribers 
get their mail at gmail.

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