SPF, DKIM, and DMARC Explained: What Each One Actually Does
SPF, DKIM, and DMARC get mentioned constantly in deliverability conversations, often as if they were interchangeable. They are not. Each one verifies something different, and understanding what each actually does makes it much easier to diagnose authentication problems instead of guessing. SPF: Who Is Allowed to Send Sender Policy Framework is a DNS record that…