Potential degradation in some features.

Update timeline

1. investigating Jun 03, 2026, 01:38 PM UTC

   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.

2. investigating Jun 03, 2026, 02:12 PM UTC

   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

3. identified Jun 03, 2026, 04:00 PM UTC

   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

4. identified Jun 03, 2026, 08:44 PM UTC

   The majority of customer symptoms have been manually mitigated by Proofpoint Engineering. We continue to work with 3rd party support to address the initial cause. 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

5. monitoring Jun 03, 2026, 10:04 PM UTC

   Working with 3rd party vendor support, Proofpoint was able to determine this was caused by a vendor side issue, who have since deployed a fix. The underlying third party issue has been resolved as of 21:30 UTC June 3rd 2026. Proofpoint is continuing to closely monitor a full recovery. 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

6. resolved Jun 04, 2026, 10:19 AM UTC

   Working with 3rd party vendor support, Proofpoint was able to determine this was caused by a vendor side issue, who have since deployed a fix. The underlying third party issue has been resolved as of 21:30 UTC June 3rd 2026. 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