Gmail still explicitly permits anyone to send spoofed emails from Gmail users via their p=none DMARC policy. When is this going to be fixed? It's long overdue. To confirm `drill _dmarc.gmail.com TXT`.
"v=DMARC1; p=none; sp=quarantine; rua=mailto:mailauth-reports@google.com"
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No, it doesn't. It only breaks mailing lists spoofing emails. As long as the mailing list only adds headers like List-Unsubscribe, the DKIM signature remains valid and it passes DMARC verification. Only misconfigured mailing lists would be broken, and they already are broken.
Don't send emails falsely claiming to originate from another address and it's not an issue... that's the feature working as intended, and as it should work. It shouldn't be possible to send spoofed mail whether or not it's a mailing list. Not at all needed to have a working list.
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