On Thu, Feb 1, 2024 at 10:03 AM Robert L Mathews via mailop < mailop@mailop.org> wrote:
> I see occasional bounces from AOL/Yahoo that look like this: > > 554 5.7.9 Message not accepted for policy reasons. See > https://postmaster.yahooinc.com/error-codes Without knowing anything else, I'd click on the link in the SMTP error. Then scroll down and you might find that the following is the reason for the bounce: "Your message failed authentication checks against your sending domain's DMARC or DKIM policy." But of course any of the other options listed there might also be the reason... (And no, this is not a new bounce error) -- Marcel
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