[Mailman-Users] options for dealing with DMARC

[John Levine]

In article <fcb467bf-4bef-051b-4a59-f6e2aea378e1 at spamtrap.tnetconsulting.net> you write:
>On 12/28/2017 12:57 PM, Jordan Brown wrote:
>> Wikipedia tells me that DMARC passes if either SPF or DKIM passes.

That is correct.

>Sending domain administrators can require that *both* SPF /and/ DKIM 
>must pass for DMARC to pass.  So your /or/ premise is likely not going 
>to work out as well as you had hoped.

That is wrong.  See RFC 7489.

R's,
John