mailprotector incident
Mail delivery delays to Microsoft 365 domains
mailprotector experienced a notice incident on January 22, 2026 affecting Shield and CloudFilter and SafeSend Email Security, lasting 17h 59m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- monitoring Jan 22, 2026, 07:51 PM UTC
Microsoft has announced a service issue affecting Exchange Online in M365. We are seeing email delivery delays to M365 domains with temporary error notifications. We will continue to monitor the Microsoft report. Mailprotector's CloudFilter and Shield services are operational.
- monitoring Jan 22, 2026, 10:36 PM UTC
Microsoft's status has not changed. For more information, please visit https://status.cloud.microsoft/
- monitoring Jan 22, 2026, 11:38 PM UTC
We will continue to monitor the status Microsoft provides at https://status.cloud.microsoft/. It appears Microsoft is making progress in some of their affected zones. Logs shows some emails are beginning to deliver, but without Microsoft's confirmation of a resolution, we expect deferrals to continue.
- resolved Jan 23, 2026, 01:50 PM UTC
This incident has been resolved.