On Mon, Nov 25, 2024 at 12:12 AM Simplelists - Andy Beverley via mailop < mailop@mailop.org> wrote:
> > We only rewrite the from address if required because of DMARC, but the > statement above implies that a special case needs to be made when > delivering to Yahoo. > > For years, Yahoo has rejected mailing list email with From lines from domains with a DMARC record with p=reject or p=quarantine. We identified a Yahoo policy change in early November, affecting handling of mailing list email from domains with a DMARC record of p=none. Previously, they would accept mailing list emails sent from these domains without having to re-write the From line. Since the policy change, they have started bouncing those messages. Our policy had been to not re-write the From lines of emails sent from p=none domains. In light of this change and to clear up other confusion, we now re-write From lines from domains that have any DMARC record. Which, alas, ends up being most of our list traffic. Cheers, Mark
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