3.19

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 signed and encrypted email flags in Events list and details.

• Added password-provided email flag visibility in the UI.

• Added RETRYING_DELIVERY status support in UI filters and views.

• Implemented retry delivery audit trail tracking with error codes.

• Added retry delivery history visibility in email audit trail UI.

• Improved file scan details presentation and consistency.

• Added email direction filter in Events list and advanced search.

• Added sandbox policy configuration support.

• Added sandbox details in file scan results UI.

Onboarding

• Improved onboarding deployment step messaging for better clarity.

Bugs

• Fixed user synchronization failures for high user-count tenants.

• Fixed allowlist email field appearing editable when read-only.

• Fixed missing config update broadcasts after new integrations.

• Fixed Firefox render loop caused by cache invalidation behavior.

• Fixed missing Message-ID generation when no ID was provided.