Email Security
The latest Email Security coverage — news, analysis, and updates from the WindowsNews.AI desk.
Exchange Online High Volume Email Reaches General Availability: What It Means for Enterprise Automation
Microsoft has announced General Availability for Exchange Online's High Volume Email feature, a significant development for organizations that rely on automated internal email communications. This...
Microsoft Tightens Graph API Email Permissions: What Developers Need to Know About Mail-Advanced Enforcement
Microsoft has announced a significant change to Graph API permissions that will fundamentally alter how applications can interact with email data in Exchange Online. Beginning September 16, 2024, the...
Exchange Server Turns 30: How Microsoft's Email Platform Became the Heart of Enterprise Identity and Security
Microsoft Exchange Server celebrates its 30th anniversary this year, marking three decades of evolution from a simple email system to the central nervous system of enterprise communication, identity...
Azure Monitor Abused for Sophisticated Billing Phishing Campaigns Targeting Microsoft Customers
Microsoft's Azure Monitor service has become an unwitting accomplice in a sophisticated phishing campaign that's bypassing traditional email security filters. Security researchers have documented...
March 2026 Microsoft benchmark: 48-hour email cleanup gap undermines 15-minute threat detection.
Microsoft's March 2026 Email Security Benchmark delivers a sobering assessment of enterprise email defenses: organizations detect threats within minutes but often take days to remediate them. The...
Exchange Online Gains Per-Connector SMTP DANE and MTA-STS Controls for Granular Email Security
Microsoft has introduced per-connector configuration options for SMTP DANE and MTA-STS validation in Exchange Online outbound connectors, giving administrators precise control over email transport...
Copilot Bug CW1226324 Bypassed Confidential Labels in Microsoft 365 Chat
A significant security vulnerability in Microsoft's flagship workplace assistant, Microsoft 365 Copilot Chat, recently exposed confidential emails that organizations had explicitly labeled with...
Outlook S/MIME and OME Bug: How Microsoft's Fix Impacts Email Security
A critical bug in Microsoft's classic Outlook desktop client has exposed significant vulnerabilities in enterprise email security workflows, creating confusion and potential compliance risks for...
Defender for Office 365 Earns Leader Status in 2025 Gartner Email Security Report
Microsoft has achieved a significant milestone in the competitive email security landscape, securing the coveted Leader position in the 2025 Gartner Magic Quadrant for Email Security. This...
Microsoft Copilot AI Integration in Outlook: The Future of Email Security Against Spam and Phishing
This morning’s inbox flood — five obvious spam messages slipping straight into the primary view of an Outlook user — is not an isolated annoyance. It’s a live demonstration of where...
Microsoft Tightens Exchange Online Direct Send Security: What Admins Need to Know
Microsoft is implementing significant security changes to Exchange Online's Direct Send functionality, marking a pivotal shift in how organizations manage email routing and tenant protection. The...
Outlook's file-sharing divide splits traditional attachments from cloud link workflows across platforms
Outlook attachments and cloud links represent one of the most fundamental yet frequently misunderstood aspects of modern email communication. What appears as a simple task—sending files through...