Degraded Outbound Email Processing on Multiple Grids

Update timeline

1. investigating Jul 14, 2026, 03:49 PM UTC

   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.

2. investigating Jul 14, 2026, 04:05 PM UTC

   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.

3. identified Jul 14, 2026, 05:43 PM UTC

   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.

4. monitoring Jul 14, 2026, 09:40 PM UTC

   We have taken mitigation steps and believe we have solved the issue of our recent service disruption that impacted outbound email processing across all regions. The Engineering team will closely monitor as the error rates have returned to normal levels. All services should now be functioning normally. We appreciate your patience while we worked to resolve this issue.