Zix Email Threat Protection Link Protection returning "service unavailable"

Update timeline

1. monitoring Jun 24, 2026, 05:08 PM UTC

   We are currently investigating reports of Link Protection returning errors when attempting to access links that are wrapped with our Link Protection scanning. We will update once we have more information. Incident: IM3949690

2. identified Jun 24, 2026, 05:12 PM UTC

   We are currently still triaging and testing our Link Protection with all available resources. We are seeing sporadic failures of link scanning and are working to bring the platform back to fully operational status.

3. monitoring Jun 24, 2026, 07:28 PM UTC

   We have implemented a fix on this and are currently monitoring logs to ensure we are not seeing any furthers with Link Protection scans. Incident: IM3949690

4. monitoring Jun 25, 2026, 03:19 PM UTC

   We are continuing to monitor our back-end logs and have seen small downtime windows that are occurring sporadically today. Our team is monitoring and continuing to work on resolve the underlying root issue. Incident: IM3949690

5. monitoring Jun 29, 2026, 01:32 PM UTC

   We are continuing to monitor our back-end logs and have seen small downtime windows that are occurring sporadically this morning. Our team is monitoring and continuing to work on resolve the underlying root issue with a planned hot fix. Incident: IM3949690

6. monitoring Jun 30, 2026, 04:43 PM UTC

   We have a planned fix in place for the underlying issue to be released today into production. We will update once the deployment has been deployed and will continue to monitor the back end logs for any further errors.

7. monitoring Jun 30, 2026, 08:50 PM UTC

   We have deployed the hot fix for the root issue and are team is monitoring our back-end logs to ensure no further error occur on the scan.

8. monitoring Jul 01, 2026, 03:04 PM UTC

   We are seeing intermittent "service unavailable" errors with the wrapped Link Protection URL's and are team continues to triage the issue. They are currently investigating the back end logs to see what is causing the errors to continue to generate. Incident: IM3949690

9. monitoring Jul 01, 2026, 07:00 PM UTC

   Our teams continue to triage the issue and are seeing lower failure rates on URL scanning with the hotfix. They are actively working to resolve the underlying/root issue. We will update once we have further details from our development teams. Incident: IM3949690

10. monitoring Jul 02, 2026, 01:50 PM UTC

    Our team continues to triage and work on a back end fix for the sporadic "service unavailable" errors. We will update once we have any further information on this. Incident: IM3949690

11. monitoring Jul 02, 2026, 02:59 PM UTC

    Our team is activelty working to add more servers into the server clusters to help mitigate any further throughput issues and plan to have those in place this afternoon. We will update once those have been completed. Incident: IM3949690

12. monitoring Jul 02, 2026, 11:28 PM UTC

    We have completed adding more server resources to the cluster and are currently monitoring logs to ensure no further errors occur. Incident: IM3949690

13. monitoring Jul 06, 2026, 12:33 PM UTC

    The team is continuing to monitor logs, and we are seeing a decrease in the "service unavailable" being returned. We are actively still triaging the issue to ensure full operational status of the service. Incident: IM3949690

14. monitoring Jul 06, 2026, 06:59 PM UTC

    The team is continuing to monitor the back end logs and are indicating a low count of any further "service unavailable" errors being presented but are actively working to ensure all services are fully operational. Incident: IM3949690

15. monitoring Jul 07, 2026, 11:57 AM UTC

    We are seeing significant reduction in Link Protection errors but are actively monitor the health of the platform to ensure the service remains flly operational at this time. Incident: IM3949690

16. resolved Jul 08, 2026, 01:30 PM UTC

    This incident has been resolved.