🗂️ DNS Record Types Reference
Email depends on DNS at every step. MX records tell the internet where to deliver your mail. TXT records carry authentication policies: SPF, DKIM, DMARC, BIMI, and MTA-STS. A and PTR records determine IP identity for spam filter checks. Each entry below includes format, examples, and RFC references.
📬 Email Delivery
Records that directly control where email is delivered and how sending IPs are identified.
🔐 Authentication (TXT)
TXT records that publish authentication and policy data for SPF, DKIM, DMARC, BIMI, and MTA-STS.
📍 Address & Routing
Records that map hostnames to IP addresses, including CNAME aliases used in DKIM delegation.
🗄️ Zone Management
Administrative records that define zone authority and name server delegation.
🔒 Security
Records that enforce TLS authentication (DANE/TLSA) and restrict certificate issuance (CAA).
🔍 Query DNS Records Live
Look up any of these record types for a domain using Google, Cloudflare, or Quad9 as your resolver.