Email Security Assessment and Phishing Resilience Testing — 日本企業向けガイド

Email remains the most common initial access vector for cyberattacks. Email security assessment covers two dimensions: technical controls (SPF record configuration and enforcement, DKIM signing, DMARC policy and reporting, email gateway filtering effectiveness, attachment sandboxing, URL scanning) and human resilience (phishing simulation campaigns testing whether employees recognise and report suspicious emails). The combination reveals whether your technical controls can prevent spoofed and malicious emails from reaching employees, and whether your employees can identify the attacks that get through. Phishing simulations should be educational, not punitive — the goal is to improve organisational resilience.