Duo Security incident

All Deployments: Email delivery issues

Resolved after 3 hours 26 minutes, affecting Admin Panel and Admin Panel and 1 more, on October 20, 2025.

resolved Oct 20, 2025, 11:20 AM UTC

The issue affecting email delivery has been resolved. System performance has remained stable, and all services are functioning normally across deployments. We’ll continue to monitor to ensure ongoing reliability. Thank you for your patience throughout this incident.

Started
Oct 20, 2025, 07:54 AM UTC
Resolved
Oct 20, 2025, 11:20 AM UTC
Duration
3h 26m
Detected by Pingoru
Oct 20, 2025, 07:54 AM UTC

Affected components

Admin PanelAdmin PanelAdmin PanelAdmin PanelAdmin PanelAdmin PanelAdmin PanelAdmin PanelAdmin PanelAdmin Panel

Update timeline

  1. investigating Oct 20, 2025, 07:54 AM UTC

    We are currently investigating an issue affecting email delivery. Our team is working to identify the root cause and restore full functionality as quickly as possible. We'll provide updates as soon as more information becomes available. Authentication is not impacted. Thank you for your patience.

  2. identified Oct 20, 2025, 09:44 AM UTC

    We have identified the cause of the issue with email delivery with the Duo Admin Panel and are actively working to restore service.

  3. resolved Oct 20, 2025, 11:20 AM UTC

    The issue affecting email delivery has been resolved. System performance has remained stable, and all services are functioning normally across deployments. We’ll continue to monitor to ensure ongoing reliability. Thank you for your patience throughout this incident.

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