Resolved on August 18, 2026.
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.
Update timeline
- 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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