No CAA record

What it means

Any certificate authority on earth may issue a certificate for example.com. CAA is the record that says which ones you actually use, without it, a mis-issued certificate is one social-engineering call away.

How to fix it

Publish a CAA record naming your CA, e.g. example.com. CAA 0 issue "letsencrypt.org"

Check your own domain

This page describes the condition. To find out whether your domain has it, run the CAA test or the full checkup, which examines every record at once.

Understand it properly

This page covers one condition. For the whole picture, DNSSEC and certificate authority records, or start at the Health Library.

Where this comes from

We judge this against RFC 8659 section 4. Every finding on this site cites the specification behind it so you can check the work rather than take our word for it.

Other CAA conditions

• CAA forbids all certificate issuance
• CAA record uses an unknown property