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Outage in Mimecast

Degraded Service – Mimecast platform authentication and POP3 access issues.

Resolved Minor
August 31, 2026 - Started 8 days ago - Lasted 1 day

Incident Report

Summary AI Generated

Mimecast experienced a 29.5-hour degraded service incident affecting authentication to the Administration Console, end user applications, and POP3 access across multiple regional grids globally. The Administration Console and end user app authentication issues were resolved progressively, with Canada restored first followed by other regions, while email flow remained unaffected throughout. A fix for the remaining POP3 issue was still in development at the time of the final update.

We are aware that some customers may be experiencing issues authenticating to the Administration Console and end user applications. We are currently investigating the issue and updates will be posted here as they become available.

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Latest Updates ( sorted recent to last )
8 days ago - at 09/01/2026 01:03AM

We are aware that some customers may be experiencing issues authenticating to the Administration Console and end user applications. We are currently investigating the issue and updates will be posted here as they become available.

8 days ago - at 09/01/2026 02:04AM

We have identified the cause of authentication issues affecting the Administration Console and end user applications for some customers across multiple regions. Email flow and other services are not impacted. Our teams are actively working on a resolution, and further updates will be posted here as they become available.

8 days ago - at 09/01/2026 03:22AM

We have taken mitigation steps and believe we have resolved the issue causing login failures on the CA Grid (Canada region). Our Engineering team is deploying the fix to other regions and will continue closely monitoring the situation as services stabilize. We will provide further updates here.

8 days ago - at 09/01/2026 06:34AM

We can confirm that the login issue affecting the Administration Console has have been resolved.
Our team has identified that a small subset of end users applications may continue to experience authentication issues. Our teams are actively working on a resolution, and further updates will be posted here as they become available.

8 days ago - at 09/01/2026 09:43AM

We continue to monitor the issue affecting login to the Administration Console. Our team continues to investigate the issue affecting a subset of end user applications and POP3 email, and further updates will be posted here as they become available.

7 days ago - at 09/01/2026 01:59PM

We can confirm that the issue with Administration Console and End User apps has been resolved. However, a fix for the issue with POP3 is currently in development and will be deployed as soon as possible. Further updates will be posted here as they become available.

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