Add the following CAA records to your
domain's DNS. Your DNS must be hosted with a
service that supports CAA.
For Google Cloud DNS, Route 53, DNSimple, and other hosted DNS services
Standard Zone File
For BIND ≥9.9.6, PowerDNS ≥4.0.0, NSD ≥4.0.1, Knot DNS ≥2.2.0
Legacy Zone File (RFC 3597 Syntax)
For BIND <9.9.6, NSD <4.0.1, Windows Server 2016