Plain-English guides to DNS records and how to verify them with online tools.
This wiki explains common DNS record types, typical mistakes, and how to validate each record online. Use the linked tools to verify live DNS answers and compare resolver results when troubleshooting propagation.
IPv4 address mapping, apex vs www, and common pointing mistakes.
IPv6 addressing, dual stack setup, and connectivity pitfalls.
Mail routing priorities, MX target requirements, and delivery checks.
SPF, DMARC, DKIM, verification strings, and long TXT formatting.
Aliases, SaaS integrations, and chain troubleshooting.
Delegation, authoritative name servers, and registrar alignment.
Zone metadata, serials, and refresh timers.
Reverse DNS, email reputation, and IP ownership constraints.
Sender policy, lookup limits, and validation warnings.
Policy, alignment, reporting, and enforcement guidance.