https://www.google.com/search?client=safari&rls=en&q=554+5.7.9+Message+not+accepted+for+policy+reasons&ie=UTF-8&oe=UTF-8 "If your emails are being rejected by Yahoo recipients with the error "554 5.7. 9: Message not accepted for policy reasons", it means that your email failed one or more authentication checks that Yahoo uses to verify that emails are truly sent from the domains they claim to originate from"
Either your DNS is broken, or you've got DKIM, SPF or DMARC misconfigured. Or the DNS brokenness is looking to the ISP like a DMARC failure. My free little checker thingy called KBXSCORE likely would be able to tell you which one it is - try sending a message to it as instructed on https://kbxscore.com . Cheers, Al Iverson -- Al Iverson / Deliverability blogging at www.spamresource.com Subscribe to the weekly newsletter at wombatmail.com/sr.cgi DNS Tools at xnnd.com / (312) 725-0130 / Chicago (Central Time) _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
