<div style="font-family: arial; font-size: 12px;"><div>My customer was receiving the same Suspicious Remote Server and Delivery Deferred NDR messages:</div><div><br></div><div><span style=" white-space: normal;">Diagnostic information for administrators:</span><br style=" white-space: normal;"><span style=" white-space: normal;">Generating server: DM4PR10MB6838.namprd10.prod.outlook.com</span><br style=" white-space: normal;"><span style=" white-space: normal;">Total retry attempts: 6</span><br style=" white-space: normal;"><span style=" white-space: normal;">[redacted]@YAHOO.COM</span><br style=" white-space: normal;"><span style=" white-space: normal;">Remote server returned '550 5.4.300 Message expired -> </span><strong style=" white-space: normal;">451 [RL01] Message temporarily deferred</strong><span style=" white-space: normal;">'</span></div><div><br></div><div>Diagnostic information for administrators:<br>Generating server: DM4PR10MB6838.namprd10.prod.outlook.com<br>Receiving server: DM4PR10MB6838.namprd10.prod.outlook.com<br>Total retry attempts: 4<br>[redacted]@AOL.COM<br><strong>3/9/2024 1:19:24 PM - Server at DM4PR10MB6838.namprd10.prod.outlook.com returned '550 5.4.318 Message expired, connection reset (SuspiciousRemoteServerError)(450 4.4.318 Connection was closed abruptly (SuspiciousRemoteServerError))'</strong><br>3/9/2024 1:09:20 PM - Server at 98.136.96.92 (98.136.96.92) returned <strong>'450 4.4.318 Connection was closed abruptly (SuspiciousRemoteServerError)</strong>'<br><br style=" white-space: normal;"><br></div><div><br></div><div contenteditable="false"><table border="0" cellpadding="0" cellspacing="0" class="MsoTableGrid" data-darkreader-inline-border-bottom="" data-darkreader-inline-border-left="" data-darkreader-inline-border-right="" data-darkreader-inline-border-top="" style="border-collapse: collapse; border: none; --darkreader-inline-border-top: initial; --darkreader-inline-border-right: initial; --darkreader-inline-border-bottom: initial; --darkreader-inline-border-left: initial;"><tbody><tr><td data-darkreader-inline-border-bottom="" data-darkreader-inline-border-left="" data-darkreader-inline-border-right="" data-darkreader-inline-border-top="" style="border-top: none; border-bottom: none; border-left: none; border-image: initial; border-right: 1pt solid windowtext; padding: 0in 5.4pt; --darkreader-inline-border-top: initial; --darkreader-inline-border-bottom: initial; --darkreader-inline-border-left: initial; --darkreader-inline-border-right: #86827c;" valign="top"><p class="MsoNormal"><img width="101" height="60" id="_x0000_i1025" src="https://f004.backblazeb2.com/file/toz-public/images/Ozone-Sig.png" alt="https://f004.backblazeb2.com/file/toz-public/images/Ozone-Sig.png" class="fr-fic fr-dii"></p></td><td data-darkreader-inline-border-bottom="" data-darkreader-inline-border-left="" data-darkreader-inline-border-right="" data-darkreader-inline-border-top="" style="border: none; padding: 0in 5.4pt; --darkreader-inline-border-top: initial; --darkreader-inline-border-right: initial; --darkreader-inline-border-bottom: initial; --darkreader-inline-border-left: initial;" valign="top"><p class="MsoNormal"><strong><span style="font-size:12.0pt;font-family:"Lucida Console";">Chris Dickens</span></strong><span style="font-size:10.0pt;font-family:"Lucida Console";"><br>The Object Zone<br>desk: (502) 716-5880<br>fax: (502) 804-4014</span></p></td></tr></tbody></table></div><div><br></div><hr id="previousmessagehr"><div><span><strong>From</strong>: Mike Lyon via Outages <outages@outages.org><br><strong>Sent</strong>: 3/11/24 1:50 PM<br><strong>To</strong>: Matt Barton <matt@netmonkey.net><br><strong>Cc</strong>: outages@outages.org<br><strong>Subject</strong>: Re: [outages] yahoo</span></div><div dir="ltr"><br></div><div dir="ltr">We’re getting these errors:</div><div dir="ltr"><br></div><div dir="ltr"><span data-darkreader-inline-bgcolor="" data-darkreader-inline-color="" style="text-size-adjust: auto; caret-color: rgb(159, 159, 159); color: rgb(159, 159, 159); font-family: Tahoma; font-size: 13px; background-color: rgb(255, 255, 255); --darkreader-inline-color: #9e9b97; --darkreader-inline-bgcolor: #323334;">returned '550 5.4.318 Message expired, connection reset (SuspiciousRemoteServerError)(450 4.4.318 Connection was closed abruptly (SuspiciousRemoteServerError))'</span></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Mar 11, 2024, at 10:46, Matt Barton via Outages <outages@outages.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">Hello<div><br></div><div>Not seeing issues sending to Yahoo here, but your SMTP test likely failed because of the invalid EHLO command.</div><div><br></div><div>Microsoft's MTA is sending you a failure notification because they were unable to deliver the email to Yahoo. Yahoo's error to Microsoft is as follows.</div><div><br></div><div>> 451 [RL01] Message temporarily deferred</div><div><br></div><div>It seems to me that Microsoft is having a problem delivering your email.</div><div><br></div><div>Thanks!</div><div><div><br>--<br>Matt Barton<br>matt@netmonkey.net</div><div><br><blockquote type="cite"><div>On Mar 11, 2024, at 1:21 PM, bannereddivpool via Outages <outages@outages.org> wrote:</div><br class="Apple-interchange-newline"><div><div dir="ltr"><div dir="ltr"><div dir="ltr">Anyone seeing any issues with yahoo email services?  I keep getting dropped;<div><br></div><div><div>telnet  <a href="http://mta6.am0.yahoodns.net/" target="_blank">mta6.am0.yahoodns.net</a> 25</div><div>Trying 67.195.204.74...</div><div>Connected to <a href="http://mta6.am0.yahoodns.net/" target="_blank">mta6.am0.yahoodns.net</a>.</div><div>Escape character is '^]'.</div><div>220 <a href="http://mtaproxy501.free.mail.bf1.yahoo.com/" target="_blank">mtaproxy501.free.mail.bf1.yahoo.com</a> ESMTP ready</div><div>EHLO <a href="http://mail.yahoo.com/" target="_blank">mail.yahoo.com</a></div><div><a href="http://250-mtaproxy501.free.mail.bf1.yahoo.com/" target="_blank">250-mtaproxy501.free.mail.bf1.yahoo.com</a></div><div>250-PIPELINING</div><div>250-SIZE 41943040</div><div>250-8BITMIME</div><div>250 STARTTLS</div><div>Connection closed by foreign host.</div></div><div><br></div><div>Sending from outlook and I'm getting this as well;</div><div><br></div><div><p><strong><span data-darkreader-inline-color="" style="font-size: 10pt; font-family: Tahoma, sans-serif; color: gray; --darkreader-inline-color: #8f8b86;">Diagnostic
information for administrators:</span></strong></p><p><span data-darkreader-inline-color="" style="font-size: 10pt; font-family: Tahoma, sans-serif; color: gray; --darkreader-inline-color: #8f8b86;">Generating server: <a href="http://sj2pr14mb6550.namprd14.prod.outlook.com/" target="_blank">SJ2PR14MB6550.namprd14.prod.outlook.com</a><br> Total retry attempts: 7</span></p><p><span data-darkreader-inline-color="" style="font-size: 10pt; font-family: Tahoma, sans-serif; color: gray; --darkreader-inline-color: #8f8b86;"><a href="mailto:babyereed2013@yahoo.com" target="_blank">sample1@yahoo.com</a><br> Remote server returned '550 5.4.300 Message expired -> 451 [RL01] Message temporarily deferred'</span></p><p><span data-darkreader-inline-color="" style="font-size: 10pt; font-family: Tahoma, sans-serif; color: gray; --darkreader-inline-color: #8f8b86;"><a href="mailto:jbliqemp@yahoo.com" target="_blank">sample2@yahoo.com</a><br> Remote server returned '550 5.4.300 Message expired -> 451 [RL01] Message temporarily deferred'</span></p><p><span data-darkreader-inline-color="" style="font-size: 10pt; font-family: Tahoma, sans-serif; color: gray; --darkreader-inline-color: #8f8b86;">Original
message headers:</span></p></div></div></div></div>_______________________________________________<br>Outages mailing list<br>Outages@outages.org<br><a href="https://puck.nether.net/mailman/listinfo/outages" target="_blank">https://puck.nether.net/mailman/listinfo/outages</a></div></blockquote></div><br></div><span>_______________________________________________</span><br><span>Outages mailing list</span><br><span>Outages@outages.org</span><br><span><a href="https://puck.nether.net/mailman/listinfo/outages" target="_blank">https://puck.nether.net/mailman/listinfo/outages</a></span></div></blockquote></div>