Falcony incident

Email Delivery Disruption to Microsoft 365 Recipients

Resolved on August 18, 2026.

resolved Aug 18, 2026, 06:18 AM UTC

Microsoft had an issue between 2026-08-14 and 2026-08-17 where it refused to process some of the email messages we sent. The affected email messages were dropped. This issue affected customers that were using Microsoft 365 service for receiving email.

Started
Aug 18, 2026, 06:18 AM UTC
Resolved
Aug 18, 2026, 06:18 AM UTC
Duration
–
Detected by Pingoru
Aug 18, 2026, 06:18 AM UTC

Update timeline

  1. resolved Aug 18, 2026, 06:18 AM UTC

    Microsoft had an issue between 2026-08-14 and 2026-08-17 where it refused to process some of the email messages we sent. The affected email messages were dropped. This issue affected customers that were using Microsoft 365 service for receiving email.

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