Hey Marcel - thanks for the reply:
On 2024-05-21 3:42 PM, Marcel Becker via mailop 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.
It's very strange - the same message sent direct to Yahoo box goes
through, when routed through a forwarder, gets the PH01
And we're getting this for pretty well all the forwarded messages.
There are no links in the test messages at least - they just say things
like "test forward via yahoo", etc
Could it be that an earlier phish that did traverse the forwarder then
get the IP (or srs domain) of the our forwarder designated as a phish?
And as I suggested yesterday, please reach out to our postmaster team
(and share details with them) for support.
Will do, thx.
- mark
-- 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 <http://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> <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 /
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--
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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