← Glossary
Reputation
What is Domain warm-up?
Gradually building the sending history of a new domain or mailbox before running real volume.
How it works in practice
A new domain has no reputation and is treated warily. Warm-up means starting with a few messages per mailbox per day, increasing slowly and keeping engagement healthy, and it typically takes several weeks before a domain carries full volume.
The common mistake
Skipping warm-up on a freshly registered domain because authentication passes.
Check it yourself
Related terms
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