as a reminder, all of my emails are signed using DKIM. if you ever receive an email lacking a DKIM signature or with a DKIM signature using a key not associated with my domain, you can be assured it's a forgery.
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Is there a particular mailing list blocking you from using an enforcing DMARC policy?
Mailing list software is largely compatible with it nowadays, as long as it's properly configured. Either needs to be configured to avoid tampering with signed mails or mark it as sent by them.
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If they choose the latter, then it's particularly important that they enforce DMARC themselves.
Mailing lists should really be enforcing that anyways. It avoids the mailing list getting itself considered to be a malicious sender by mass forwarding spoofed emails from others.