3.24

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

• Introduced sandbox integration to analyze files with active content for deeper threat detection

• Added configurable engine-count thresholds for malicious and suspicious verdicts to reduce false positives

• Added file hash allowlist support for managing trusted files across scanning, verdict, and audit flows

• Added CSV export for the Events and Messages pages

• Enabled rescanning of emails carrying a sandbox verdict

• Fixed an error in the integration wizard that disrupted onboarding

• Fixed the onboarding wizard not pre-populating a sample integration name

• Fixed the Dashboard integrations counter incorrectly counting empty integrations

Bugs

• Fixed emails incorrectly receiving a 'Failure to Analyze' verdict

• Fixed Dashboard graphs and counts not updating without a hard refresh

• Fixed the policy page refreshing when changing a policy status

• Fixed a 'Bad Request' error when creating a policy with a duplicate name

• Fixed the Scan Report showing external recipient addresses under top blocked recipients