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7 Lessons Learned From Replacing 800+ SEGs

Learn what more than 800 SEG replacements reveal about the limits of third-party gateways, the realities of migration, and life after the SEG.

Información clave

More than 1,200 attacks per 1,000 mailboxes bypass SEGs each month, on average.

~75% of Abnormal customers operate without a third-party secure email gateway.

Stronger native cloud email security and API-based protection can replace many of the overlapping controls traditionally handled by a third-party SEG.

More than 80% of SEG migrations require just 5 to 10 hours of configuration work.

Organizations can evaluate Abnormal through a read-only proof of value with no MX record changes or impact on existing email flow.

Secure email gateways were built for an earlier threat landscape, when filtering spam, malware, and known malicious indicators was the primary challenge. Today, attackers increasingly use social engineering, compromised accounts, and legitimate infrastructure to bypass the static rules and signature-based detection that traditional SEGs rely on.

At the same time, native cloud email security has become significantly more capable. Combined with API-based behavioral detection, organizations can increasingly replace overlapping gateway controls rather than layering another security product on top.

More than 800 SEG replacements have given Abnormal a clear view of what organizations consistently discover before, during, and after migration. 7 Lessons Learned From Replacing 800+ SEGs distills that experience into practical guidance on the threats legacy gateways miss, what migration actually requires, and what changes once the third-party SEG is gone.

Download 7 Lessons Learned From Replacing 800+ SEGs to learn:

  • Why static SEG rules struggle against modern social engineering and account takeover
  • How native cloud email security and behavioral AI can work together without a traditional gateway
  • What organizations should expect from the SEG replacement process
  • How customers have reduced cost, manual work, and security gaps after moving off their SEG

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