Have you tried reaching out to them directly to get more details? I know
they also lurk here, but pretty sure they prefer you contact their team
first and then escalate if necessary.
https://senders.yahooinc.com/contact/
On 5/21/24 8:01 PM, Mark E. Jeftovic via mailop 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:
o Viruses
o Phishing attempts
o Ransomware
o Other malicious software
o 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>
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 /
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