Outage in Mimecast
Degraded Outbound Email Processing on Multiple Grids
Resolved Minor
July 14, 2026 - Started 4 days ago
- Lasted about 6 hours
Incident Report
Summary AI Generated
Mimecast experienced a ~6-hour outbound email processing disruption across all major grids (US, UK, Canada, Germany, South Africa, Australia, and Offshore), during which some outbound emails were delivered to external recipients with blank or "null" message bodies. Engineering identified the root cause and applied mitigation steps, observing improving error rates across affected regions. Intermittent issues may have persisted during the mitigation period, while all other Mimecast services remained unaffected throughout.
We are aware of a service disruption impacting outbound email processing for some customers across multiple grids. Some outbound messages delivered to external recipients may contain a blank or incorrect message body.
Our Engineering team is actively investigating to mitigate the issue. Further updates will be posted here as they become available.
All other Mimecast services are operating as normal.
Components affected
Mimecast United States Grid Mimecast United States B Grid Mimecast United Kingdom Grid Mimecast South African Grid Mimecast Australian Grid Mimecast Offshore Grid Mimecast Canadian Grid Mimecast German GridTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
4 days ago - at 07/14/2026 03:49PM
We are aware of a service disruption impacting outbound email processing for some customers across multiple grids. Some outbound messages delivered to external recipients may contain a blank or incorrect message body.
Our Engineering team is actively investigating to mitigate the issue. Further updates will be posted here as they become available.
All other Mimecast services are operating as normal.
4 days ago - at 07/14/2026 04:05PM
We are aware of a service disruption impacting outbound email processing for some customers across multiple grids. Some outbound messages delivered to external recipients may contain a blank or "null" display in the body.
Our Engineering team is actively working to determine the root cause and scope of impact. Further updates will be posted here as they become available.
All other Mimecast services are operating as normal.
4 days ago - at 07/14/2026 05:43PM
We believe we have identified the issue affecting customers across multiple grids, where some outbound messages were delivered with a blank or "null" message body.
We have taken initial mitigation steps and are seeing error rate improvements in impacted regions. The Engineering team will continue the mitigation process while closely monitoring performance.
Customers may still experience intermittent issues while mitigation work continues. We will provide further updates here as they become available.
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