Outage in Tessian EU
Intermittent Inbound & Outbound Email Check Delays for EU
Minor
January 30, 2026 - Started 4 days ago
Incident Report
We observed intermittent email check timeouts on our EU server earlier today.
Between 11:00-1:00 UTC:
Adaptive Email DLP - up to 6% of Outbound emails may have sent partially or fully unchecked.
Core Email Protection API - up to 2% of Inbound emails may have been delivered partially or fully unchecked.
The issue has stabilized, and our team has not seen a recurrence as we closely monitor.
We will continue to monitor through the weekend and update if anything changes.
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Latest Updates ( sorted recent to last )
MONITORING
about 18 hours ago - at 02/02/2026 11:59AM
A small number of email check timeouts were seen on our EU server earlier today.
Between 08:22-09:52 UTC:
Core Email Protection API - up to 0.06% of Inbound emails may have been delivered partially or fully unchecked.
We will continue to monitor and update if anything changes.
MONITORING
4 days ago - at 01/30/2026 06:07PM
We observed intermittent email check timeouts on our EU server earlier today.
Between 11:00-1:00 UTC:
Adaptive Email DLP - up to 6% of Outbound emails may have sent partially or fully unchecked.
Core Email Protection API - up to 2% of Inbound emails may have been delivered partially or fully unchecked.
The issue has stabilized, and our team has not seen a recurrence as we closely monitor.
We will continue to monitor through the weekend and update if anything changes.
Latest Tessian EU outages
Microsoft service degradation impacting mailflow - 11 days ago
Delays evaluating inbound emails on our EU Server - 13 days ago
Outlook for Mac - Email Send blocked for some users - 19 days ago
Intermittent M365 Add-in Timeouts - 23 days ago
Slight Delay on a subset of Inbound Email CEP API Checks - about 2 months ago
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