Topic starter
23/10/2026 12:46 am
TL;DR: Fraudulent BEC requests can still get through authenticated mail and normal workflows, according to Adaptive Security. Transaction controls have to verify authority after delivery, not rely on message authenticity alone.
Editorial analysis by NHI Mgmt Group, based on content published by Adaptive Security: “Why BEC Bypasses Email Filters: A Practical Framework to Detect, Verify, and Stop Fraudulent Requests”.
Key questions
Q: Why do BEC attacks succeed even in organisations with strong email security?
A: They succeed because email security tools inspect technical indicators, while BEC targets human judgment and business process.
Q: What are the warning signs that a BEC verification process is failing?
A: The biggest signs are rushed approvals, payment changes accepted through the same email thread, and teams that rely on sender authenticity instead of known-good contacts.
Q: What breaks when email authentication passes but a payment request is still fraudulent?
A: The control breaks at the trust decision, not at message delivery.
Practitioner guidance
- Implement independent callback verification for payment changes Require every bank-detail change, invoice reroute, payroll update, or urgent transfer to be confirmed through a previously trusted phone number or approved collaboration channel.
- Separate email authentication from payment approval Use SPF, DKIM, and DMARC to reduce spoofing, but make finance workflows depend on dual approval and prevalidated beneficiary records rather than email replies.
- Harden executive and supplier request workflows Flag thread hijacking, lookalike domains, and mailbox takeover scenarios in procurement, accounts payable, legal, and executive-assistant processes.
Bottom line: BEC succeeds because it attacks business decision making after message delivery, not because email gateways are blind to malware.
Glossary terms: Business email compromise, Email Account Compromise, Email Authentication, Independent Callback Verification
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This topic was modified 6 days ago by NHI Mgmt Group
23/10/2026 9:49 am
BEC is a workflow-authentication problem before it is an email-security problem. The article’s core point is that the gateway can be correct and the business decision can still be wrong. That shifts governance from message inspection to transaction verification, which is the point where identity, finance, and security controls finally intersect. Practitioners should treat any approval path that depends on email alone as structurally incomplete.
A few things that frame the scale:
- Businesses report a 200% surge in attempted deepfake-aided wire fraud in Q1 2025 alone.
A question worth separating out:
Q: How should security and finance teams divide responsibility for BEC prevention?
A: Security teams should own detection, message controls, and identity assurance, while finance teams should own payment verification, vendor callback checks, and approval discipline. BEC is a cross-functional control problem, so unclear ownership creates gaps that attackers can exploit during busy periods.
👉 Read our full editorial: Why BEC bypasses email filters and how verification closes it
This post was modified 6 days ago by NHI Mgmt Group