Warm Domains
Domain Setup & Infrastructure2 min read·2026-04-21

How to Transition From Warmup to Active Campaigns

The transition from warmup-only to active campaigns is a critical period. Handle it poorly and you undo your warmup investment.

The transition from warmup-only to active campaigns is a critical period. Handle it poorly and you undo your warmup investment.

The wrong way

Day 14 of warmup: Turn off warmup entirely. Start sending 40 cold emails per day. Watch your deliverability crash because you eliminated the positive signals and replaced them with cold outreach volume that generates lower engagement.

The right way

Day 14: Reduce warmup from 30 to 20 emails per day. Start campaign at 5 emails per day. Day 16: Keep warmup at 20. Increase campaign to 10 per day. Day 19: Keep warmup at 15 to 20. Increase campaign to 15 per day. Day 22: Warmup at 15. Campaign at 20 per day. Day 25: Warmup at 10 to 15. Campaign at 25 per day. Day 28+: Warmup at 10 to 15. Campaign at 25 to 30 per day. Total: 35 to 45 per day.

The principle

The transition should be gradual, with warmup decreasing as campaigns increase, but warmup never dropping to zero. The total daily volume should stay within safe limits throughout the transition.

Monitoring during transition

Test deliverability after each volume increase. If inbox placement drops, pause the campaign volume increase and let warmup run for a few more days before trying again. The transition is not a rigid timeline — it is responsive to your deliverability data.

Common mistakes during transition

Turning off warmup entirely. Increasing campaign volume too quickly. Exceeding total daily limits. Not testing deliverability during the ramp. Ignoring early warning signs (open rate drops).


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