Outage in Mimecast

Mimecast Security Agent Disruption

Resolved Minor
September 20, 2025 - Started 4 days ago - Lasted about 3 hours

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Outage Details


Mimecast is aware of a service disruption impacting our Mimecast Security Agent (MSA). The agent's requests back to Mimecast are currently being rejected resulting in DNS failures on clients. Web Security customers utilizing our DNS filtering without the use of the MSA are functioning normally. We are investigating this issue and will post further updates here.
Components affected
Mimecast United Kingdom Grid Mimecast South African Grid Mimecast Australian Grid Mimecast German Grid Mimecast Offshore Grid Mimecast Canadian Grid Mimecast United States Grid Mimecast United States B Grid
Latest Updates ( sorted recent to last )
4 days ago - at 09/20/2025 05:30PM


Mimecast is aware of a service disruption impacting our Mimecast Security Agent (MSA). The agent's requests back to Mimecast are currently being rejected resulting in DNS failures on clients. Web Security customers utilizing our DNS filtering without the use of the MSA are functioning normally. We are investigating this issue and will post further updates here.

4 days ago - at 09/20/2025 08:02PM


We believe we have resolved the issue impacting customers utilizing the Mimecast Security Agent (MSA). Our engineering team continues to monitor the situation for stability. We will provide further updates here.

Latest Mimecast outages

Degraded Service on US Grid - 5 days ago
Degraded Cloud Integrated Service - about 1 month ago
Administration Console Inaccessible - about 1 month ago
Intermittent delivery delays on DE grid - about 2 months ago
Intermittent delivery delays on DE grid - 2 months ago

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