AI-powered
A DNS checker that looks up a domain's records and checks the settings that most often break websites and email.
AvailableReady to use.
Open the tool| Record | Value | Result |
|---|---|---|
| A | 203.0.113.10 | OK |
| MX | mail.example.com | OK |
| SPF | v=spf1 ~all | Valid |
| DMARC | Not found | Missing |
AI explains records and email settings in plain words. The records come straight from DNS.
Every common record type is requested.
The answer from each name server is compared.
SPF, DMARC and DKIM records are read and tested.
What each problem breaks and how to fix it.
DNS is the internet's address book: it turns a domain name into the server addresses that answer for it, and tells other mail servers where to send its email. A DNS checker looks up those records and shows what the world sees.
It helps after moving a site to a new host, setting up email, or when a site works for some people and not for others.
A and AAAA records point the domain to server addresses. CNAME points one name at another. MX says where email goes. TXT holds settings such as SPF and site verification. NS lists the name servers, CAA limits who may issue certificates and SOA holds the zone's basic settings.
These three records tell receiving mail servers which servers may send email for your domain and how to treat mail that fails the check. Without them, your email is more likely to land in spam or be refused, and others can send mail that looks like yours.
Resolvers keep each answer for the record's time to live. After a change, some people still get the old answer until that time runs out. Lowering the time to live a day before a move makes the switch faster.
Resolvers keep old answers until the record's time to live runs out.
Large mail providers now expect it from senders. Without it, mail is more likely to be refused or marked as spam.
No. Only public DNS records are read.