3.20

Release dateVersion
1st April 20263.20

MetaDefender™ Cloud Email Security is an advanced solution that bolsters Microsoft 365’s native email defenses with industry-leading threat prevention. It is purpose-built to detect and neutralize malware, zero-day exploits, and embedded file-based threats before they reach the inbox.

This solution is powered by OPSWAT’s Metascan™ Multiscanning, adding more AV (antivirus) engines, MetaDefender Aether Sandbox for advanced dynamic threat analysis, and Deep CDR™ (Content Disarm & Reconstruction) against file-based threats. By combining signature-based detection, behavioral sandboxing, and proactive content sanitization, email security extends beyond traditional defenses to identify and neutralize both known and zero-day threats. With multi-layered, proactive protection and advanced technologies designed to combat evolving attack techniques, the solution deploys rapidly and integrates seamlessly without disrupting mail flow.

Enhancements

  • Added customizable SMTP routing table per integration to support third-party MTA environments in front of M365
  • Added MetaDefender Aether statistics to the dashboard and Policies section
  • Grouped file scan verdicts by technology in the event details view
  • Added full SMTP server error message to audit history for delivery failures

Bugs

  • Fixed archive scan exceeding size limit not being handled correctly
  • Fixed user not reappearing in the list after being deleted and re-added
  • Fixed encrypted flag disappearing from event details after a failed rescan
  • Fixed role label mismatch in the user management modal
  • Fixed missing loading indicator when opening the sandbox full report
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