Have you opened a ticket with Yahoo? Are you *SURE* there’s not a problem with one of the links in your message pointing to phishing / malware / etc? Remember, Yahoo sees the entire content of the message before they reject it - so if your content contains links that are infected or hosting phishing sites then you’re the problem.
I’ve found that PH01 is usually accurate but if it’s not, only opening a ticket is the way to fix it. laura > On 21 May 2024, at 20:01, Mark E. Jeftovic via mailop <mailop@mailop.org> > wrote: > > Following on my email yesterday and after running a few more tests. > > The error message from Yahoo is simply > > Remote-MTA: dns; mta6.am0.yahoodns.net > Diagnostic-Code: smtp; 554 Message not allowed > [PH01] Email not accepted for policy reasons > > which links back to > > https://senders.yahooinc.com/smtp-error-codes/ > > The PH series errors says simply "Content Based Blocks" > > These error messages indicates that your email wasn't accepted because there > is something in the content that Yahoo won't accept for policy reasons. > Objectionable content that Yahoo deems unacceptable includes: > Viruses > Phishing attempts > Ransomware > Other malicious software > Links or URLs to any of the above > > Which is not the case - especially in our tests where we're simply sending > text only messages with no links. > > The only difference between messages that get through vs ones that are > rejected (same message) is whether we send to the Yahoo email box directly, > or else via an email forward (which has SRS enabled, and optionally SPF and > even minimal DMARC) > > So it is looking like Yahoo is not accepting email forwards (at least from > us) since Friday, May 17th. > > - mark > > -- > Mark E. Jeftovic <mar...@easydns.com> <mailto:mar...@easydns.com> > Co-founder & CEO easyDNS Technologies Inc. > +1-(416)-535-8672 ext 225 > > "Never expect a thing you do not want, > and never desire a thing you do not expect." > -- Bob Proctor > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop -- The Delivery Expert Laura Atkins Word to the Wise la...@wordtothewise.com Delivery hints and commentary: http://wordtothewise.com/blog
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