Domain Warm-Up and Sending Best Practices

A new domain has no track record, so it's treated with suspicion until it proves itself.

How warm-up works

New domains progress through fixed daily-limit stages, no hourly caps. Hit the full limit and you're bumped to the next stage automatically; fall short and progression pauses. Starts automatically at domain verification, roughly 1,000 emails/day initially, climbing to full volume.

Moving an existing domain with history: warm-up doesn't start automatically — enable it manually; the system reviews past activity (and Postmaster data, if connected) to recommend a starting stage.

Best practices while warming up (and beyond)

Send to your most engaged contacts first. Verify addresses before sending. Set up DMARC early, even in monitoring mode. Match your From domain to your sending domain. Always include a working unsubscribe link. Use double opt-in where possible. Stop mailing unengaged contacts (90+ days). Keep sending frequency consistent.

A dedicated IP needs its own warm-up too. Full domain warm-up typically takes a few weeks of consistent, engaged sending.