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From Dominance to Decline: The Fall of the SEG and the Future of Email Security

Discover why traditional SEGs are fading—and how Abnormal’s AI-powered platform closes critical security gaps by detecting the threats others miss.

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SEGs were designed for spam and viruses, leaving them unable to detect today's socially-engineered threats like BEC and credential phishing.

Routing email through third-party gateways weakens an organization's Microsoft 365 native security posture.

SEGs still miss the final 1% of threats—the most dangerous ones—while adding operational complexity and manual workload.

Behavioral AI detects anomalies and automates threat response within Microsoft 365 and Google Workspace without requiring manual tuning.

Hundreds of enterprises have already removed SEGs in favor of AI-native email security without sacrificing protection.

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Traditional secure email gateways (SEGs) were built for an era of spam and viruses—not today’s subtle, socially-engineered threats. As attacks grow more advanced, SEGs fall short, missing the final—and most dangerous—1% of threats while adding complexity and manual work.

Abnormal uses behavioral AI to detect anomalies, automate threat response, and integrate seamlessly with Microsoft 365 and Google Workspace—no tuning required.

This white paper explores why organizations are leaving legacy SEGs behind for a smarter, AI-native approach.

Download From Dominance to Decline: The Fall of the SEG and the Future of Email Security to learn:

  • Why SEGs miss today’s most dangerous attacks, including BEC and credential phishing.

  • How routing email through third-party gateways weakens your Microsoft 365 security posture.

  • What makes behavioral AI fundamentally more effective at detecting sophisticated threats.

  • Why hundreds of enterprises have already removed SEGs—without sacrificing protection.


Fill out the form to get your copy today.

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