Microsoft 365 Delisting Service
nanog at ics-il.net
Tue Dec 6 16:07:33 UTC 2022
I'd go to the MailOps list.
Intelligent Computing Solutions
Midwest Internet Exchange
The Brothers WISP
----- Original Message -----
From: "Andrian Visnevschi via NANOG" <nanog at nanog.org>
To: nanog at nanog.org
Sent: Tuesday, December 6, 2022 4:09:07 AM
Subject: Microsoft 365 Delisting Service
Is there anyone from the Microsoft 365 team here ? or is there anybody who has contacts of any representative who can help with IP delisting ?
We are a cybersecurity company, protecting organizations from our own cloud. Our IP ranges always had a good reputation and all online public services show our IPs as good, and not listed on any spam lists / black lists.
We have a customer who is using 22.214.171.124 IP. We checked it into all public services for IP reputation and everywhere it shows up as GOOD.
Anyway using Microsoft 365 Services, all emails are rejected:
" Unfortunately, messages from [126.96.36.199] weren't sent.
Please contact your Internet service provider since part of their network is on our block list (S3150). "
We tried to delist the IP 188.8.131.52 many times through https://sender.office.com/ but it never worked... All the time we submit the request, it says that it requires escalation, we ask for escalation and nothing happens, we are not getting any feedback for weeks...
At the outlook ipStatus( https://sendersupport.olc.protection.outlook.com/snds/ipStatus.aspx
) I don't see any of our IPs having an abnormal status...
Has anybody encountered the same issue ? How did you get it resolved ? It looks very hard to cooperate with Microsoft, they keep ignoring us while customer is complaining and the IP was never part of any spam lists/black lists...
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