Outage in Exclaimer
Issues processing messages within the UK region
Resolved MinorIncident Report
Summary AI Generated
Exclaimer experienced a 4-hour incident affecting Office 365 mail routing in the UK region, during which messages risked failing to deliver. Engineers applied a fix to prevent further impact, with affected messages deferred rather than lost, ensuring eventual delivery. The issue was fully resolved and all mail flow confirmed operational.
Exclaimer engineers are aware of an issue where messages within the UK may be impacted and fail to be delivered at this time.
The team is actively working to address the issue
Components affected
Exclaimer Mail Routing - Office 365Trusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
21 days ago - at 07/01/2026 03:41PM
The issue is now resolved and the all mail flow processing is operational
MONITORING
21 days ago - at 07/01/2026 12:10PM
Exclaimer engineers have applied a fix to address the issue, ensuring no further messages will be affected. Any messages that were impacted would have been deferred for delivery and would be sent rather than failing to be delivered entirely.
We will continue to monitor and provide further updates in the next hour.
IDENTIFIED
21 days ago - at 07/01/2026 11:45AM
Exclaimer engineers are aware of an issue where messages within the UK may be impacted and fail to be delivered at this time.
The team is actively working to address the issue
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