CNAME Record
Canonical Name record — a DNS record that maps one domain name to another.
CNAME (Canonical Name) records are DNS records that alias one domain to another. In cold email, they're most commonly used for custom tracking domains.
For example, you might create a CNAME record: link.yourdomain.com → custom.instantly.ai. This tells DNS to resolve link.yourdomain.com to Instantly's tracking server.
CNAME records are also used for DKIM setup (pointing your DKIM selector to your email provider's DKIM servers) and for setting up custom domains on email services.