SPF, DKIM, and DMARC Explained: The Complete Email Authentication Guide

Every day, over 3 billion phishing emails are sent worldwide. Many of them claim to be from legitimate organizations: your bank, your employer, your SaaS provider. The recipients see a familiar domain in the "From" field and trust it. But the email didn't come from that organization at all. It came from an attacker who exploited a gap in the domain's email authentication configuration. Three DNS-based protocols exist specifically to prevent this: SPF, DKIM, and DMARC. Together, they form a laye...