Outage in Tessian EU
Delays evaluating inbound emails on our EU Server
Resolved Minor
January 21, 2026 - Started 13 days ago
- Lasted about 23 hours
Incident Report
Proofpoint is investigating delays evaluating inbound emails by Core Email Protection API
Impact:
Security Events may take over 3 minutes to be created for newly delivered emails.
Associated Warn/Quarantine actions based off your configuration may also be delayed by the same amount.
There is no delay to initial email delivery.
Proofpoint is actively investigating the cause and working to identify a resolution. We will update as it progresses.
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Latest Updates ( sorted recent to last )
INVESTIGATING
13 days ago - at 01/21/2026 04:33PM
Proofpoint is investigating delays evaluating inbound emails by Core Email Protection API
Impact:
Security Events may take over 3 minutes to be created for newly delivered emails.
Associated Warn/Quarantine actions based off your configuration may also be delayed by the same amount.
There is no delay to initial email delivery.
Proofpoint is actively investigating the cause and working to identify a resolution. We will update as it progresses.
Latest Tessian EU outages
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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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