Tessian incident

Reduced Outbound Checks

Minor Resolved View vendor source →

Tessian experienced a minor incident on May 13, 2026 affecting Proofpoint API and Gateway and 1 more component, lasting —. The incident has been resolved; the full update timeline is below.

Started
May 13, 2026, 02:20 PM UTC
Resolved
May 13, 2026, 02:20 PM UTC
Duration
—
Detected by Pingoru
May 13, 2026, 02:20 PM UTC

Affected components

Proofpoint APIGatewayProofpoint Cloud Email Security PlatformProofpoint PortalM365 Add-inCOM Add-in for WindowsCore Email Protection APIAEDLP Email Misdelivery ProtectionAEDLP Email Exfiltration ProtectionAEDLP Custom PoliciesReported EmailsInvestigate and Respond - Email Search

Update timeline

  1. resolved May 13, 2026, 02:20 PM UTC

    Status: Resolved Between 13:55 and 14:20 UTC , we were alerted to an increase in timeouts on our US server for Outbound checks. Outbound emails sent during the impact period may have timed out and sent unchecked. The team quickly took steps to mitigate and will take the appropriate actions to prevent it in the future. Affected components AEDLP Custom Policies (Operational) Proofpoint Cloud Email Security Platform (Operational) Proofpoint API (Operational) AEDLP Email Misdelivery Protection (Operational) AEDLP Email Exfiltration Protection (Operational) Core Email Protection API (Operational) Proofpoint Portal (Operational) Reported Emails (Operational) Investigate and Respond - Email Search (Operational) Gateway (Operational) Core Email Protection API (Operational) M365 Add-in (Operational) COM Add-in for Windows (Operational)