Introducing CNAME Flattening: RFC-Compliant CNAMEs at a Domain's Root

What this post added

Introduced CNAME Flattening, a feature that allows CNAME records at the root of a domain while adhering to DNS specifications. This is achieved by Cloudflare's authoritative DNS infrastructure recursively resolving the CNAME chain to an A record, effectively "flattening" it. This resolves edge cases like Microsoft Exchange email issues and improves DNS resolution time by approximately 30% through caching.