The piece that is most valuable from the Mimecast standpoint will be the sandboxing feature.
Mimecast Email Security offers sandboxing, impersonation protection, and integration with Microsoft 365 for effective management and threat reduction. Its straightforward setup and user-friendly console enhance convenience, despite high pricing. Content filtering, spam filtering, and secure messaging are strong, though detection rates and false positives need work. While support relies on articles, outbound mail servers face blocklisting issues. Mimecast's rule-based threat filtering can be challenging for users to configure.