DNS records. What each record does, tied to deliverability.
11 guides in this section of the Knowledge Base. For the concepts first, start with Learn.
No guide in this section matches that. The other sections are linked above.
Every guide. In one list.
11 guides- What is a DNS record? DNS records explainedOne instruction stored against your domain, and why a wrong one breaks mail.
- What is an MX record? (and why a wrong one loses mail)Where mail to your domain goes, and why a wrong MX loses it quietly.
- What is an A record? (A and AAAA, explained)A name to an IPv4 address, AAAA for IPv6, and the reverse match Gmail expects.
- What is a CNAME record? (and why not at your apex)One name pointing at another, why never at the apex, and how it carries DKIM.
- What is a TXT record (and why SPF, DKIM, and DMARC all live in one)?Free text in DNS, where SPF, DKIM, and DMARC live, and the rules that bite.
- What are NS records? (and why your DNS edit did nothing)Which provider answers your DNS, and why an edit elsewhere does nothing.
- What is an SOA record? (Start of Authority, explained)The zone's serial and timers, and why a new record can read as not found.
- What is a PTR record? (reverse DNS, explained)The IP to name lookup mail servers check, and why your IP host sets it.
- What is an SRV record? (and why email rarely needs one)Where a service lives, why it does not route mail, and the one email use.
- What is DNSSEC? (and what it means for email)Signed DNS answers, what that means for email, and the rollover that goes wrong.
- DNS propagation and TTL: why your change isn't live yetNo push, only caches: why a change is not live everywhere yet.
Start with one domain. See it with your own data.
Free for one domain, no card. Add one DNS record and the first reports usually arrive within a day.