DNS
DNS
Domain Name System. The internet's phone book that translates domain names to IP addresses.
Definition
DNS (Domain Name System) is the internet's directory service that translates human-readable domain names into IP addresses. For email, DNS is crucial for authentication (SPF, DKIM, DMARC records), mail routing (MX records), and verification. DNS queries are used throughout the email delivery process to look up where to send messages and validate sender authenticity.
Pro Tip
DNS changes can take 24-48 hours to propagate globally. Plan authentication changes accordingly.