How to warm up a new email domain without burning it
In short: A new domain has no sending reputation, so blasting cold email on day one looks like spam and gets you filtered or blacklisted. Warming up means ramping volume gradually over several weeks so mailbox providers learn to trust you. Plan your exact day-by-day ramp with the free Warm-Up Calculator.
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Why new domains need warming up
Mailbox providers judge senders partly on history. A domain that has never sent mail has no history, so providers are cautious. If that unknown domain suddenly sends hundreds of emails, it matches the pattern of a spammer who just registered a throwaway domain. Warming up builds a track record of small, well-received sends so your reputation grows before your volume does.
How a warm-up ramp works
You start low and increase gradually. A typical pattern begins around 20-40 emails a day in week one and roughly doubles each week, slowing as you approach your target volume. The exact numbers depend on your provider and target, but the shape is always the same: a gentle curve, never a spike. The ramp usually runs three to six weeks before you reach full sending.
What to do during warm-up
Volume is only half of it. During warm-up:
- Send to your most engaged recipients first so early signals are positive.
- Keep bounces near zero by sending only to verified addresses.
- Watch for complaints and slow down if they appear.
- Maintain steady daily sending rather than bursts.
Plan your ramp with a calculator
Guessing the numbers is risky. The Warm-Up Calculator takes your target daily volume and produces a day-by-day schedule, so you know exactly how many to send each day. Before you start, confirm your authentication is clean (SPF, DKIM, DMARC); warming up a domain that fails authentication wastes the whole effort.
Plan your domain warm-up free
Turn your target volume into a day-by-day ramp so you build reputation without burning the domain.
Open the Warm-Up Calculator →All free tools