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Last couple days for sure... but has been going longer with
40.92.62-63.0/24 for a couple weeks<br>
<br>
Which for any decent postfix MTA configuration will cause a 554.<br>
<br>
><br>
Jun 10 09:20:20 cust-mta01 postfix/smtpd[8137]: NOQUEUE: reject:
RCPT from unknown[40.92.62.80]: 554 5.7.1 Client host rejected:
cannot find your reverse hostname, [40.92.62.80];
from=<a class="moz-txt-link-rfc2396E" href="mailto:user@outlook.com"><user@outlook.com></a> to=<a class="moz-txt-link-rfc2396E" href="mailto:customer@domain.com.au"><customer@domain.com.au></a>
proto=ESMTP
helo=<AUS01-SY4-obe.outbound.protection.outlook.com><br>
<br>
Mal<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 11/06/2021 8:47 am, Mike Manning
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5D207EB4DB92C34A86B2CA50AC286F4338C5CAB3@Exchange.matilda.net.au">
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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anyone else here experiencing missing RDNS
for a swath of IP’s from Microsoft on a few different subnets?
I’ve opened a ticket with Microsoft netops for it and I’ve
done an rDNS bypass on our local antispam filter however we’re
now seeing o365 clients with the same issue when trying to
receive emails from anyone with an @outlook.com or @msn.com
email address.. where do you draw the line in adding bypass
after bypass?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">host 40.92.63.85<o:p></o:p></p>
<p class="MsoNormal">Host 85.63.92.40.in-addr.arpa. not found:
3(NXDOMAIN)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">host 40.92.62.31<o:p></o:p></p>
<p class="MsoNormal">Host 31.62.92.40.in-addr.arpa. not found:
3(NXDOMAIN)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#00629F;mso-fareast-language:EN-AU">Mike
Manning</span></b><span
style="font-size:13.5pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"><br>
</span><b><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray;mso-fareast-language:EN-AU">Network
Engineer</span></b><span
style="font-size:13.5pt;color:black;mso-fareast-language:EN-AU"><br>
<br>
</span><b><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#00629F;mso-fareast-language:EN-AU">Matilda
Internet</span></b><span
style="font-size:13.5pt;color:black;mso-fareast-language:EN-AU"><br>
</span><span
style="font-size:7.5pt;font-family:"Tahoma",sans-serif;color:gray;mso-fareast-language:EN-AU">________________</span><span
style="font-size:13.5pt;color:black;mso-fareast-language:EN-AU"><br>
<br>
</span><span
style="font-size:7.5pt;font-family:Wingdings;color:#A18C4C;mso-fareast-language:EN-AU">(</span><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#A18C4C;mso-fareast-language:EN-AU">Telephone
+61 7 4953 0711</span><span
style="font-size:13.5pt;font-family:"Arial",sans-serif;color:#A18C4C;mso-fareast-language:EN-AU"><br>
</span><span
style="font-size:7.5pt;font-family:Wingdings;color:#A18C4C;mso-fareast-language:EN-AU">(</span><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#A18C4C;mso-fareast-language:EN-AU">Fax
+61 7 4849 5000<br>
29 Gregory Street, Mackay, QLD 4740, Australia<br>
</span><span
style="font-size:7.5pt;font-family:Wingdings;color:#00629F;mso-fareast-language:EN-AU">*</span><span
style="font-size:13.5pt;color:black;mso-fareast-language:EN-AU"> </span><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#00629F;mso-fareast-language:EN-AU">Email</span><span
style="font-size:13.5pt;color:black;mso-fareast-language:EN-AU"> </span><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#00629F;mso-fareast-language:EN-AU"><a
href="mailto:mike@matilda.net.au" moz-do-not-send="true"><span
style="color:purple">mike@matilda.net.au<br>
</span></a>Website</span><span
style="font-size:13.5pt;color:black;mso-fareast-language:EN-AU"> <a
href="http://www.matilda.net.au/" moz-do-not-send="true"><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:purple">www.matilda.net.au<br>
</span></a><br>
<br>
</span><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray;mso-fareast-language:EN-AU">This
email and any files transmitted with it are confidential and
are intended solely for the use of the individual or entity
to whom it is addressed. If you are not the recipient be
advised that you have received this email in error and that
any use, dissemination, forwarding, printing copying or use
of the contents contained in this e-mail and any file
attachments is strictly prohibited. If you have received
this email in error please immediately notify the sender by
telephone or by reply email to the sender. You must destroy
the original transmission and its contents. It is
recommended that you virus test the information and any
attachments. Matilda Internet does not accept liability for
any loss or damage howsoever occurred as a result of this
email transmission or any attachments to it.</span><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black;mso-fareast-language:EN-AU"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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