Outage in Mimecast
Email Processing Delays: USB
Resolved Minor
July 23, 2026 - Started 1 day ago
- Lasted about 9 hours
Incident Report
Summary AI Generated
**Mimecast experienced email processing delays on its United States B Grid lasting approximately 9.4 hours.** The issue caused intermittent email delivery delays for customers hosted on the USB grid, with Mimecast identifying the root cause and implementing mitigation steps during the incident. The incident was moving toward full resolution after teams confirmed improvements following the applied fixes.
We are aware that some customers hosted on our USB grid may be experiencing intermittent delivery delays. We are currently investigating and will post updates here as they become available.
Components affected
Mimecast United States B GridTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
1 day ago - at 07/23/2026 04:11PM
We are aware that some customers hosted on our USB grid may be experiencing intermittent delivery delays. We are currently investigating and will post updates here as they become available.
1 day ago - at 07/23/2026 04:47PM
We have identified the cause of the intermittent delivery delays affecting some customers hosted on our USB grid. Our teams are actively working on a resolution, and further updates will be posted here as they become available.
about 22 hours ago - at 07/23/2026 09:39PM
We have implemented mitigation steps to address intermittent delivery delays for some customers hosted on our USB grid. Our teams are seeing improvements and are continuing to work toward full resolution.
We will provide further updates as they become available.
Latest Mimecast outages
Administration Console Page Loading Issue - 1 day ago
Intermittent Processing Delays on AU Grid - 1 day ago
Sync and Recover (S&R) Migration Failures - 2 days ago
Administration Console access issue- USB - 7 days ago
Degraded Outbound Email Processing on Multiple Grids - 10 days ago
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