Outage in Exclaimer
Possible Mail delays within UK
Resolved MinorIncident Report
Summary AI Generated
Exclaimer Cloud experienced an issue causing email delays for Microsoft 365 users in the UK, affecting the Mail Routing - Office 365 component for 1 hour. Engineers identified problematic servers in the UK region and rerouted traffic away from them to prevent further message delays. The incident was resolved by removing and replacing the affected servers, with monitoring confirming the error rate returned to normal levels.
Exclaimer Engineers are aware of an issue that may cause messages to be delayed when sent to Exclaimer Cloud for Microsoft 365 users in the UK.
More information will be provided once it is available.
Components affected
Exclaimer Mail Routing - Office 365Trusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 1 hour ago - at 06/10/2026 03:43PM
After continued monitoring, we have confirmed the issue is no longer occurring.
Servers that were displaying errors have been removed and replaced within our UK region to prevent the issue from reoccurring.
If you are still seeing issues with mail flow when using Exclaimer at this time, please reach out to our support team directly, who will be happy to help.
MONITORING
about 2 hours ago - at 06/10/2026 03:02PM
Exclaimer Engineers have confirmed that the error rate is now dropping after a spike in both UK regions, suggesting that other actions taken have been able to address the issue.
We are continuing to look into the cause whilst monitoring for any further issues.
INVESTIGATING
about 2 hours ago - at 06/10/2026 02:52PM
Exclaimer Engineers have made a change in the UK region to prevent messages from being delivered to the affected servers.
This should prevent further messages from being impacted and ensure that impacted messages are processed as expected on the next attempt.
INVESTIGATING
about 2 hours ago - at 06/10/2026 02:45PM
Exclaimer Engineers are aware of an issue that may cause messages to be delayed when sent to Exclaimer Cloud for Microsoft 365 users in the UK.
More information will be provided once it is available.
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