Can you clarify what kind of CNAME you're referring to? The only CNAMEs that aren't "supported" are CNAMEs on the root of a zone, which are a violation of the D

Can you clarify what kind of CNAME you're referring to? The only CNAMEs that aren't "supported" are CNAMEs on the root of a zone, which are a violation of the DNS spec, as CNAMEs cannot coexist with other records, which must exist at the root of the zone.