Episode 85 — Email Security: SPF, DKIM, DMARC, and Gateways
Email remains the top vector for phishing, fraud, and malware, and this episode explains how layered defenses counter those risks. You’ll learn how Sender Policy Framework (SPF) verifies authorized mail servers, DomainKeys Identified Mail (DKIM) ensures message integrity through digital signatures, and Domain-based Message Authentication, Reporting, and Conformance (DMARC) ties them together to validate domain identity. The discussion illustrates how these standards prevent spoofing and protect brand reputation by ensuring recipients can trust what they see.
Listeners will also explore how secure email gateways add another layer—filtering spam, scanning attachments, and rewriting suspicious URLs. We explain how encryption options like S/MIME and TLS secure content in transit, and why outbound inspection policies matter just as much as inbound defenses. By mastering how these technologies interlock, you’ll be ready to analyze exam questions on email trust chains and apply those lessons to building resilient communication systems in any organization. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.
