Deliverability
SPF vs DKIM vs DMARC: What Each Record Does
SPF authorizes sending servers, DKIM signs messages cryptographically, and DMARC ties both to your visible From address with a policy and reporting. A plain-English comparison of all three DNS records, the exact syntax, the 10-lookup limit, alignment rules, and the staged rollout order that gets you to p=reject without blocking your own mail.
Aug 19, 20269 min read