Mimecast experienced a minor incident on June 24, 2026 affecting United States Grid and United States B Grid and 1 more component, lasting 2h 57m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 24, 2026, 03:27 PM UTC
We are currently investigating an issue affecting the delivery of SMS messages to recipients. Some customers may experience delays or failures when Mimecast attempts to deliver SMS notifications. We have identified a potential issue with one of our third-party SMS delivery provider and are actively working with them to determine the root cause and restore full service. Impact: SMS message delivery to recipients may be delayed or unsuccessful. Services affected: SMS notifications and alerts Other Mimecast services are not affected by this issue.
- identified Jun 24, 2026, 04:07 PM UTC
We have identified the root cause of the SMS delivery issue currently affecting some Mimecast customers. Our third-party SMS provider has confirmed the root cause and their engineering team is actively working on a solution. SMS messages processed during the incident window may experience delays and will be reprocessed once services are fully restored. Impact: SMS message delivery to recipients may be delayed or unsuccessful, including 2FA authentication codes sent via SMS. Services affected: SMS notifications and 2FA via SMS Other Mimecast services are not affected by this issue. We will provide a further updates here.
- monitoring Jun 24, 2026, 05:20 PM UTC
Our third-party SMS provider has resolved their incident and confirmed full service restoration. SMS delivery, including 2FA codes, should now be back to normal. Any messages delayed during the incident window have been processed. We are monitoring to confirm full recovery on our end and will close this incident within 60 minutes if no further issues are observed.