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

Secure Email Gateways (SEGs) once served as the gold standard in email security, blocking spam, malware, and phishing threats. However, the rise of AI-driven attacks and cloud-based platforms like Microsoft 365 and Google Workspace has rendered traditional SEGs outdated and inefficient. This white paper outlines how legacy SEGs struggle to detect modern threats, forcing organizations to disable Microsoft’s native protections—introducing complexity and blind spots. In response, Abnormal proposes a fundamentally different model: a behavioral AI platform that integrates natively with cloud platforms via API. This approach analyzes user behavior to detect and stop sophisticated threats—including business email compromise, impersonation, and financial fraud—that bypass traditional filters. The document also introduces Abnormal’s SEG Migration Program, which offers organizations a seamless path to abandon legacy SEGs without compromising protection, reducing both cost and operational overhead.

Modernize your email defense—explore Abnormal’s AI-driven platform and SEG migration program today.