Microsoft Incident Resulting in Delivery Issues to M365

Resolved

None impact

Started

Lasted 32m

View official incident ↗

Updates

  1. Resolved

    This incident has been resolved.

  2. Monitoring

    Starting around 08:00 UTC, Microsoft began experiencing an incident causing an increased volume of deferred emails across all M365 regions. The affected responses are returning "451 4.7.500 Server busy". Our teams are actively monitoring the situation. Sending to other email providers is not affected.