Topic starter
27/06/2026 1:26 pm
TL;DR: Legacy secure email gateways are no longer sufficient against modern email threats, and Abnormal AI’s Innovate 2025 webinar argues that organizations are replacing SEGs with Microsoft plus Abnormal to improve detection and simplify operations. The real issue is that email security now depends on behavioral detection and operational consolidation, not just perimeter filtering.
Editorial analysis by NHI Mgmt Group, based on content published by Abnormal AI: “See the Proof: Why 200+ Organizations Replaced the SEG with AI”.
Key questions
A: Lean teams often lose ground because outdated detection, weak reporting, and poor automation create delays at every stage of triage.
Q: How should security teams defend against modern email attacks that bypass legacy filters?
A: They should use layered detection that combines message content, sender reputation, user behavior, and post-delivery response.
Practitioner guidance
- Reassess SEG dependence Map which threats your secure email gateway can still detect reliably and which attacks depend on sender behaviour, conversation context, or account activity after delivery.
- Add behavioural email detections Tune detections for abnormal sending patterns, unusual reply chains, and identity mismatches that indicate impersonation or account compromise.
- Rationalise email security operations Reduce duplicated policy ownership across mail security, identity telemetry, and incident response so alert triage follows one clear workflow.
Bottom line: Legacy secure email gateways were designed for a different threat model, and that gap shows up most clearly in impersonation and behaviour-led attacks.
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This topic was modified 3 days ago by NHI Mgmt Group
27/06/2026 2:46 pm
Perimeter email filtering is no longer a complete control plane for identity-led attacks: Secure email gateways were built for message inspection, but modern email abuse increasingly turns on behaviour, context, and post-delivery interaction. That means the decisive signal is often not the message itself but the relationship between sender, recipient, and account activity. Practitioners should treat email security as an identity-adjacent detection problem, not a mail hygiene problem.
A question worth separating out:
Q: How do email security controls and IAM risk signals work together?
A: Email controls identify suspicious communication, while IAM signals help prioritise which accounts or sessions deserve faster investigation. Combining them gives security teams a clearer view of compromise, especially when phishing, impersonation, or account takeover are part of the same attack path.
👉 Read our full editorial: Email security is shifting beyond secure email gateways
This post was modified 3 days ago by NHI Mgmt Group