Email security gateways with sandboxing

When protecting an enterprise against advanced email threats like zero-day malware, sophisticated spear-phishing, and Business Email Compromise (BEC), the "best" choice depends on whether you lean toward a dedicated cloud email security platform, an API-integrated cloud native solution, or a traditional secure email gateway (SEG) with robust sandboxing.

Industry analysts (like Gartner) and enterprise deployment trends highlight several top-tier enterprise solutions equipped with advanced CPU-level or OS-level sandboxing:

Top Enterprise Email Security Solutions with Sandboxing

• Mimecast Email Security (with Targeted Threat Protection): Recognized consistently as an enterprise leader, Mimecast offers robust perimeter and internal email defense. Its sandboxing (Attached Threat Protection) inspects suspicious files and URLs in real-time, sandboxing objects before delivery or rewriting URLs to block click-time attacks.linkedin.com
• Cisco Secure Email (formerly IronPort / Cloud Mailbox Security): Renowned for high-volume enterprise reliability, Cisco pairs its reputation with Cisco Secure Email Threat Defense and Cisco Threat Grid (its enterprise sandboxing engine). Threat Grid provides deep behavioral analysis and artifact extraction for unknown attachments.
• Widely considered an enterprise gold standard for compliance and inbound filtering. Its TAP sandbox dynamically analyzes suspicious attachments and URLs, tracking threat actors across channels and providing granular forensic data.