3.16.1

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, and Deep CDR™ (Content Disarm & Reconstruction) against file-based threats. With multi-layered, proactive protection, email security goes beyond signature-based detection with advanced technologies against evolving threats. Designed for seamless integration, the solution deploys rapidly without disrupting mail flow.

Improvements & Fixes

Email Protection & Policy Enforcement

• Fixed an issue where policies were not correctly applied to group recipients, ensuring the intended policies are enforced consistently.

• Improved OTP validation to support secondary domains and email aliases.

• Resolved issues with certain attachment types incorrectly failing analysis.

Reporting & Dashboard

• Fixed discrepancies between Dashboard metrics and report data for prevented threats and event counts.

• Improved accuracy of Dashboard event counters for released and quarantined messages.

• Updated “Top Blocked Senders” logic to use the sender’s From: address across Dashboards and Reports.

• Improved report filtering and field availability in Quarantine Reports.

• Enhanced date handling in Quarantine Reports.

Search & Event Visibility

• Improved email search reliability when From: header information differs from the SMTP envelope sender.

• Improved audit trail completeness for message rescans and related events.

SIEM / SOAR Enhancements

• Improved SIEM/SOAR configuration experience with clearer guidance and safer handling of sensitive fields.

• Expanded SIEM/SOAR event coverage to include:

  • Quarantined and blocked emails

  • Login and logout events (successful and failed)

• Added configurable filtering to control which events are sent to SIEM/SOAR platforms.

Operational & Platform Improvements

• General performance, reliability, and maintainability improvements across the platform.