TL;DR
- Expel MDR now supports Mimecast, adding a fourth email security integration to our lineup.
- Mimecast alerts are ingested into Expel Workbench™ and correlated with activity across your entire environment—endpoint, identity, cloud, and more.
- If you’re already running Mimecast, you can now get 24×7 investigation and response coverage on top of it, starting today.
Email is still where attacks start
Our 2026 Annual Threat Report found that identity-based incidents accounted for 68.6% of all incidents among Expel customers in 2025—and phishing remains one of the most reliable ways attackers get the foothold they need. That’s not a new problem, but it’s one that deserves a serious answer.
That’s why we’ve been systematically expanding MDR coverage for email. We already support Proofpoint, Abnormal AI, and Sublime Security. Now Mimecast is part of that lineup—and if it’s the email security tool your organization has standardized on, that matters.
What you actually get
This isn’t a “better together” story where two logos sit next to each other in a slide deck. Here’s what the integration does in practice.
Mimecast alerts are pulled directly into Expel Workbench™ via API. From there, our analysts treat them like any other security signal—they get triaged, enriched with context from across your environment, and investigated by the same people handling your endpoint and identity incidents. If an email alert connects to a suspicious login or lateral movement elsewhere in your environment, we’ll find it.
When it’s time to act, response actions on email threats run through the same procedures as everything else we handle. No separate workflow. No waiting for someone to pivot between tools.
Why this matters if you’re a Mimecast customer
Before this integration, Mimecast customers who worked with Expel were getting MDR coverage across their endpoints, cloud, identity, and SaaS—but email was a gap. That gap is now closed.
Your Mimecast deployment stays exactly as it is. We integrate with it, ingest its alerts, correlate it with other signals across your environment and layer on the detection and response work your team shouldn’t have to do manually. You get earlier visibility into attacks that start in the inbox, with the cross-environment context to understand their full scope.
Here’s what that looks like for your team:
- Email threats investigated 24×7, not just when someone on your team has capacity
- Mimecast alerts correlated with endpoint, identity, and other signals in your environment
- Malicious email removal and other response actions handled through standard Expel incident procedures and auto-remediations (where available)
- One place—Expel Workbench—to see what’s happening across your entire attack surface
Ready to enable it?
If you’re an existing Expel customer running Mimecast, reach out to your customer success team to get MDR for Email set up. If you’re not yet working with Expel and want to see what 24×7 coverage across your email environment looks like in practice, start here.
MDR for Email with Mimecast is available to Expel customers today and can be added to any existing MDR service package.
