Exclaimer incident

Delayed email delivery to Microsoft 365 (Outlook) recipients

Ongoing since 06:51 PM UTC, affecting EU: Server-Side: Mail Routing - Office 365 and US: Server-Side: Mail Routing - Office 365 and 1 more.

investigating Nov 12, 2026, 06:52 PM UTC

We are continuing to monitor the impact of this issue as Microsoft works to mitigate it.

Started: Nov 12, 2026, 06:51 PM UTC
Resolved: Ongoing
Duration: ● 1h 4m
Detected by Pingoru: Nov 12, 2026, 06:51 PM UTC

Affected components

EU: Server-Side: Mail Routing - Office 365US: Server-Side: Mail Routing - Office 365CA: Server-Side: Mail Routing - Office 365UAE: Server-Side: Mail Routing - Office 365AU: Server-Side: Mail Routing - Office 365UK: Server-Side: Mail Routing - Office 365DE: Server-Side: Mail Routing - Office 365

Update timeline

investigating Nov 12, 2026, 06:51 PM UTC

We’re seeing delays delivering emails to Microsoft 365 (Outlook) recipients across all regions, due to an issue on Microsoft’s side affecting their mail infrastructure. Emails are delayed and being automatically retried, not lost. No action is needed from you. We’re monitoring and will post updates as we learn more.
investigating Nov 12, 2026, 06:52 PM UTC

We are continuing to monitor the impact of this issue as Microsoft works to mitigate it.

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