Outage in Mimecast
SMS delivery delays
Resolved Minor
June 24, 2026 - Started 23 days ago
- Lasted about 2 hours
Incident Report
Summary AI Generated
Mimecast experienced a ~2-hour SMS delivery disruption across all grids due to a fault with a third-party SMS delivery provider. SMS notifications and SMS-based 2FA authentication codes were delayed or failed to deliver, while all other Mimecast services remained unaffected. The root cause was identified and the provider's engineering team worked to resolve the issue, with affected messages queued for reprocessing once service was restored.
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.
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.
Components affected
Mimecast United Kingdom Grid Mimecast South African Grid Mimecast Canadian Grid Mimecast Australian Grid Mimecast United States Grid Mimecast United States B Grid Mimecast Offshore Grid Mimecast German GridTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
23 days ago - at 06/24/2026 03:27PM
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.
23 days ago - at 06/24/2026 04:07PM
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.
Latest Mimecast outages
Administration Console access issue- USB - about 10 hours ago
Degraded Outbound Email Processing on Multiple Grids - 3 days ago
Australia Region: Email processing delays - 4 days ago
SMS delivery delays - 23 days ago
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