Resolved incident

Microsoft Incident Resulting in Delivery Issues to M365

Mailgun · None · Started

Duration
34m
Severity
None
Status
Resolved

Summary

None · Resolved

Microsoft has resolved the underlying issue, we are seeing deliveries to M365 process normally.

View official incident ↗

Event timeline

How this incident unfolded, from the official status page.

  1. Monitoring

    Mailgun

    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.

  2. Monitoring

    Mailgun

    We are continuing to monitor for any further issues.

  3. Resolved

    Mailgun

    Microsoft has resolved the underlying issue, we are seeing deliveries to M365 process normally.