Creating a DMARC record on your domain means (among other things) that you expect no email sent from your domain to be a contribution to mailing list discussions.
Telling mailing list owners and mailing list software designers to violate RFC 5322 Internet message format's description of the From header line to make you happy is abusive. How does your decision to implement DMARC become their problem? That is not right. Your choice is not their problem. The DMARC standard should say, implement this only for domains that will send mail that should never be forwarded or sent to mailing lists. That was the original purpose. It does very well for that use case and it is very valuable for that use case. All of the problems come from misusing DMARC for ordinary end-user email. I'm talking to you, yahoo. I got tired of posting here, but that is still my position. Joe Brennan Columbia University IT
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