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Why Microsoft CYMRU BOGONS IPv6 Blacklist Threads Are Locked

Maira MehtabMaira Mehtab Oct 1, 2026 869 views

Question details

Users are looking for the reason why Microsoft Community discussions regarding Microsoft servers appearing on the CYMRU BOGONS IPv6 blacklist have been locked by moderators.

Why CYMRU BOGONS IPv6 Blacklist Threads Are Locked in Microsoft Community
Product
Microsoft 365
Device & OS
not provided
Scenario
Trying to find information, follow up, or report an issue about Microsoft servers being listed on an IPv6 blacklist.
Observed behavior
The relevant discussion threads on the Microsoft Community forum are locked, preventing users from posting further replies, logs, or updates.
Before you start

Before seeking further assistance, verify if you are an end user or a Microsoft 365 organization administrator, as the proper support channels will differ based on your account role.

Solution 1Recommended

Contact Microsoft 365 Technical Support for Blacklist Investigation

Since community moderators lack access to backend resources and cannot collect required server logs, old threads are locked. You must contact official support channels for investigation.

The primary reason these specific CYMRU BOGONS IPv6 blacklist threads are locked is their age. Furthermore, Microsoft Community moderators do not have the necessary backend access to investigate server-level blacklist issues or collect the required diagnostic logs.

1
Identify your administrator

If you are an end user, locate and contact your Microsoft 365 global administrator to report the blacklist issue. End users cannot open direct backend support tickets.

2
Open a support request

Microsoft 365 administrators should log into the Microsoft 365 admin center, navigate to the Support section, and open a formal support request with Microsoft 365 Technical Support.

3
Contact your reseller

If your organization's Microsoft 365 subscription was purchased through a third-party reseller, reach out directly to the reseller for technical assistance rather than Microsoft.

Contact Microsoft 365 Technical Support for Blacklist Investigation
Logs Required: When opening a ticket, be prepared to provide network traces and specific Non-Delivery Reports (NDRs) to help Microsoft engineers identify the blacklisted IPv6 nodes.
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Frequently Asked Questions

Why do Microsoft Community moderators lock old troubleshooting threads?

Old threads are frequently locked to prevent outdated information from surfacing and to encourage users with similar, yet distinct, current issues to open new threads for dedicated and accurate troubleshooting.

Can a standard user submit a ticket for Microsoft server blacklist issues?

No, standard end users cannot directly open tickets for backend server issues in Microsoft 365. You must contact your organization's global administrator, who has the correct permissions to submit a technical support request.

What should I do if my Microsoft 365 license was bought via a reseller?

If your subscription is managed by a third-party reseller, Microsoft direct support may redirect you. You should contact the reseller's support team first to investigate and escalate the CYMRU BOGONS IPv6 blacklist occurrence.