In article <543E391F-800B-4DAD-9310-B6D121AD0FEA@lem.click> you write:
>> Why is adoption low? Is that a big problem? Why so few aggressive 
>> policies? Is that a big problem?
>
>DMARC can be quite useful even with p=none. This use case provides 
>insight on what's going on and sometimes, that's all that is wanted. 
>Moving to more aggressive policies require a degree of control on the 
>mail flows that not all organizations are prepared to exercise, IMO.

Quite right. My system publishes DMARC policies for over 100 domains,
and they're all p=none execpt that four which don't send mail at all
have p=reject.

I collect and look at the reports which can be very interesting.

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