Exclaimer incident
Emails are getting Pending/Defer Status when sending Emails
Resolved after 3 days 11 hours, affecting EU: Server-Side: Mail Routing - Office 365 and US: Server-Side: Mail Routing - Office 365 and 1 more, on January 23, 2026.
No further issues with mail flow have been identified over the weekend that were caused by this incident. If you are continuing to experience issues with your Exclaimer Subscription, please don't hesitate to reach out, and our team will be more than happy to assist.
Affected components
Update timeline
- investigating Jan 23, 2026, 02:39 AM UTC
We are currently investigating an issue affecting email delivery within our Exclaimer services. Email routed through Exchange Online may be impacted due to an ongoing Microsoft incident (MO1221364).
- monitoring Jan 23, 2026, 06:32 AM UTC
We have confirmed that Microsoft has deployed a fix to address the issue and confirmed resolution for Incident (MO1221364). We are continuing to monitor the service for stability.
- monitoring Jan 23, 2026, 06:38 AM UTC
We are continuing to monitor for any further issues.
- resolved Jan 26, 2026, 02:33 PM UTC
No further issues with mail flow have been identified over the weekend that were caused by this incident. If you are continuing to experience issues with your Exclaimer Subscription, please don't hesitate to reach out, and our team will be more than happy to assist.
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