Re: [mailop] Microsoft 365 DNS failure?

Daniel Colquitt via mailop Thu, 22 Jan 2026 16:53:21 -0800

On 22 Jan 2026, at 20:20, Aaron C. de Bruyn via mailop <[email protected]> wrote:

I just got flooded with calls from the one client we have that uses the Microsoft cloud.
Tons of mail delivery issues, unable to access the admin portal, Teams also appears to be impacted.

-A

On Thu, Jan 22, 2026 at 12:08 PM Mark Alley via mailop <[email protected]> wrote:

Hey all, anyone else seeing DNS issues with *.mail.protection.outlook.com FQDNs? Our queues for mail to EXO tenants is growing steadily due to either deferrals or DNS lookup failures.

- Mark Alley

Yes — widespread issue now acknowledged by Microsoft, but details scant: https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect

Dan

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Re: [mailop] Microsoft 365 DNS failure?

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