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The 3-Layer Email Security Model for 2026

A Practical Guide for 2026


This white paper clearly describes the 3-layer email security model:


  • Layer 1 – Built-in Protection (Baseline) 
Native cloud protection mechanisms as a necessary foundation – but not a complete strategy.

  • Layer 2 – Standard Email Security (Control & Enforcement)
 Hygiene, control, and compliance through SPF, DKIM, DMARC, routing control, DLP, and encryption.

  • Layer 3 – Advanced Email Security (Adaptive Threat Prevention)
 AI-based, context- and relationship-oriented detection of targeted, malware-free attacks.

Download the white paper now
Learn how a 3-layer email security model helps stop modern email attacks without operational overload.



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