[dmarc-ietf] DMARC Coverage

Scott Kitterman <sklist@kitterman.com> Sat, 13 April 2019 21:12 UTC

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From: Scott Kitterman <sklist@kitterman.com>
To: dmarc@ietf.org
Date: Sat, 13 Apr 2019 17:12:20 -0400
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Subject: [dmarc-ietf] DMARC Coverage
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A couple of days ago I sent a single message to a reasonably large mailing 
list (spf-help, email oriented - so likely not representative, but it's a data 
point).  Since I am a list owner, I know how many subscribers there are and 
from my DMARC feedback, I know how many times that single message got 

43% of them showed up in my DMARC feedback, so that's at least one data point 
on breadth of coverage for DMARC feedback.

To do this (at least the way I did it), you need to send a single message in a 
reporting period to an email list that does not re-write from and for which 
you know how many subscribers there are.

I'm curious what kind of numbers other might be able to come up with.

Scott K