GoKawiilGuide details SPF, DKIM and DMARC setup using Mailfully's domain tool
A new how-to guide walks through configuring SPF, DKIM and DMARC records for a sending domain, using Mailfully's setup process as the working example. It explains that SPF authorizes sending IPs, DKIM cryptographically signs messages, and DMARC checks alignment between the two and enforces a policy, with receiving servers using all three to decide whether mail is legitimate.