Exclaimer experienced a minor incident on June 10, 2026 affecting UK: Server-Side: Mail Routing - Office 365, lasting 58m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 10, 2026, 02:45 PM UTC
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.
- investigating Jun 10, 2026, 02:52 PM UTC
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.
- monitoring Jun 10, 2026, 03:02 PM UTC
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.
- resolved Jun 10, 2026, 03:43 PM UTC
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.