SPF, DKIM & DMARC Tips
25 articles on the everyday administration of SPF, DKIM and DMARC. Reading records, rolling out policy, working through reports, and the mistakes that break mail without anyone noticing. Written to be read in order, but each one stands alone.
Email authentication in plain English
SPF, DKIM and DMARC are three DNS records answering one question for a receiving server: should this message, claiming to be from your domain, be trusted?
Start readingDNS hygiene for email administrators
TTLs, string limits, propagation and stale records cause more email incidents than the protocols themselves. A short checklist for keeping the zone honest.
2 min readLocking down domains that never send mail
Parked domains, redirect domains and internal subdomains are spoofed precisely because nobody protects them. Three records fix it permanently.
2 min readA monthly email authentication checklist
Authentication is not a project you finish. Thirty minutes a month keeps SPF, DKIM and DMARC from drifting out from under you.
2 min read