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3.21
| Release date | Version |
|---|---|
| 22nd April 2026 | 3.21 |
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
- Implemented full mobile responsiveness across the application — collapsible sidebar/drawer, dashboard, events page, policies, settings pages (templates, reports, integrations), and all data tables with card-based mobile layouts
- Added login and logout events to the audit log, captured on the backend and surfaced in the audit log UI
Bugs
- Fixed dashboard charts aggregating in the wrong direction for the 24-hour view, showing stale data, and not updating when switching the timeframe selector
- Fixed the events page refresh button requiring two clicks to display the latest results
- Fixed the incorrect
addresslabel name shown in event filters - Fixed a misleading
A task was cancellederror message being logged on email delivery failure - Fixed banner not being applied to malicious emails when the policy action was set to Allow
- Integration wizard: Fixed Enterprise Application permissions not being applied correctly during admin consent