What is DNS lookup and what is it for?
Shows a domain's DNS records: A and AAAA (server address), MX (mail server), TXT (SPF, DMARC and verification records), NS (name servers), CNAME, SOA and CAA. When diagnosing a site or email problem this is the first place to look; most faults come from a wrong or missing DNS record.
Frequently Asked Questions
- Enter the domain.
- Choose the record type you want to see or list them all.
- Compare with the value you expect.
- If you made a change, query again after a while to see propagation.
It depends on the record's TTL; usually between a few minutes and a few hours. Lowering the TTL before a planned switch speeds it up.
Check the priority values and that the target addresses are correct. Also make sure your SPF record covers the sending server.
Yes. A domain can have only one SPF record; with two, verification fails entirely. Merge the records into a single line.
It limits which certificate authorities may issue certificates for your domain. Not mandatory, but it adds protection against unauthorised certificate issuance.