7 Lessons Learned from Replacing 200+ SEGs

As organizations increasingly transition from legacy Secure Email Gateways (SEGs) to modern cloud-native solutions, Abnormal Security has compiled key insights from over 100 such migrations. This brief distills seven practical lessons drawn from real-world customer experiences, spanning organizations of various sizes and industries.

Key takeaways include:

• SEGs are outdated and ineffective against today’s threats like business email compromise and zero-day phishing.
• Microsoft 365 and Google Workspace offer strong native protections—and adding Abnormal enhances these, rather than disables them.
• API-based integration enables seamless deployment in under an hour, without disrupting mail flow.
• Organizations reduce cost, complexity, and operational overhead by eliminating redundant tools.
• Most importantly, customers report fewer threats, faster remediation, and higher team satisfaction post-migration.

With real-world data showing 60+ hours saved per month, zero successful attacks post-deployment, and substantial financial savings, this document is both a reflection on the past and a blueprint for modernizing email security.

Join the growing wave of SEG-free organizations—leverage these lessons and start your Abnormal migration today.