Email security and identity governance: where teams are falling behind

TL;DR: Email remains the most exposed enterprise communication channel, and the article argues that phishing, business email compromise, account takeover, and privilege abuse all succeed when identity controls are weak, according to SecurEnds. The decisive shift is that email security now depends on access governance, not just spam filtering.

NHIMG editorial — based on content published by SecurEnds: Email Security Explained: Protecting Your Inbox and Business

By the numbers:

• 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation.

Questions worth separating out

Q: How should security teams reduce the risk of email-driven account takeover?

A: Security teams should reduce account takeover risk by limiting what email can recover, enforcing strong authentication, and monitoring mailbox behaviour for signs of abuse.

Q: Why do compromised inboxes create wider IAM risk than many teams expect?

A: Compromised inboxes create wider IAM risk because they often sit at the centre of reset flows, delegated access, and trust-based approvals.

Q: What breaks when organisations rely on email as the main approval channel?

A: What breaks is the assumption that sender identity proves request legitimacy.

Practitioner guidance

• Review mailbox recovery paths Map which accounts can trigger password resets, MFA resets, or session recovery through email, then narrow those paths for high-risk users and privileged roles.
• Tighten delegated and shared mailbox access Inventory shared mailboxes, forwarding rules, and delegated access, then remove permissions that are no longer justified.
• Add behavioural monitoring for mailbox abuse Alert on unusual login locations, new forwarding rules, abnormal reply patterns, and impossible travel for inbox sign-ins.

What's in the full article

SecurEnds's full blog post covers the operational detail this post intentionally leaves for the source:

• Step-by-step email security best practices for enterprises working across Microsoft 365 and Google Workspace
• Detailed explanations of SPF, DKIM, and DMARC configuration choices for sender authentication
• Monitoring and response guidance for phishing, spoofing, and mailbox abuse scenarios
• Practical rollout sequence for access reviews, conditional access, and user awareness controls

👉 Read SecurEnds's analysis of email security, phishing, and account takeover risk →

Email security and identity governance: where teams are falling behind?

Explore further

View Full Forum →  |  NHI Foundation Course →