The Importance of Email Security

**Executive summary:** This document provides a comprehensive overview of email security risks—including phishing, business email compromise, APTs, spoofing, and supply-chain risks—describes their potential operational, financial, and reputational impacts, and recommends layered defenses such as multi-factor authentication, advanced filtering and sandboxing, encryption, DLP, regular training, threat intelligence integration, and incident response planning; it is advisory guidance rather than an incident report.