What’s the difference between cold-domain testing vs production-domain testing?

Cold-domain testing sends from a new domain with no reputation history. It shows baseline treatment for unknown senders.

Production-domain testing sends from your actual sending domain. It reflects your established reputation, for better or worse.

Cold-domain tests reveal how providers treat newcomers. Production tests show how they treat you specifically.

Testing from production domains gives actionable placement data. Cold-domain testing is useful when evaluating new domain strategies.

Testing a new ship shows how ports receive unknown vessels. Testing your flagship shows how they receive you.