Tessian is currently experiencing a major incident affecting Proofpoint API and Proofpoint Cloud Email Security Platform and 1 more component, which began 2h ago. The vendor's full update timeline is below.
Affected components
Update timeline
- investigating Jun 03, 2026, 01:38 PM UTC
Status: Investigating We are currently investigating the degradation of some features, including Silent outbound API and the Abuse Mailbox. The team is actively working to mitigate and we will follow up with more details soon. Affected components Proofpoint Cloud Email Security Platform (Degraded performance) Proofpoint API (Degraded performance) Proofpoint Portal (Degraded performance)
- investigating Jun 03, 2026, 02:12 PM UTC
Status: Investigating Proofpoint Engineering is actively working to mitigate customer impact. We've engaged 3rd party support to address the cause, and will continue to update on progress. Full list of potential impact can be found here: https://proofpoint.my.site.com/community/s/article/Proofpoint-Service-Interruption-Affecting-elements-of-Core-Email-Protection-API-and-Adaptive-Email-DLP-03-June-2026 Affected components Reported Emails (Degraded performance) Proofpoint Cloud Email Security Platform (Degraded performance) Proofpoint API (Operational) Core Email Protection API (Degraded performance) Proofpoint Portal (Degraded performance)
- identified Jun 03, 2026, 04:00 PM UTC
Status: Identified Proofpoint Engineering is continues to mitigate customer impact per item. We remain engaged 3rd party support to address the cause and resolve the overall issue. Full list of potential impact can be found here:https://proofpoint.my.site.com/community/s/article/Proofpoint-Service-Interruption-Affecting-elements-of-Core-Email-Protection-API-and-Adaptive-Email-DLP-03-June-2026 Affected components Proofpoint Cloud Email Security Platform (Degraded performance) Proofpoint API (Operational) Core Email Protection API (Degraded performance) Proofpoint Portal (Degraded performance) Reported Emails (Degraded performance)