On Tue, May 21, 2024 at 12:06 PM Mark E. Jeftovic via mailop < mailop@mailop.org> wrote:
> So it is looking like Yahoo is not accepting email forwards (at least from > us) since Friday, May 17th. > No, that's not the case. PH01 errors are suspected phish. And as I suggested yesterday, please reach out to our postmaster team (and share details with them) for support. -- Marcel On Tue, May 21, 2024 at 12:06 PM 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> <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://urldefense.com/v3/__https://list.mailop.org/listinfo/mailop__;!!Op6eflyXZCqGR5I!Gol59Xe4smnL79Ymv3hXLYajtVdHxjGrmzC13pL-Xo3rsfcMfN9LxxZ-Jv3y-fwoUWzJitZA4Q2ZVjcq1V99$ >
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