Free tool
Email Warmup Calculator
Work out how long it takes to warm a domain or IP from today's volume to your target. Advanced mode lets you set the daily increase and see the full ramp schedule.
How it works
- 1Enter your current daily volume and target daily volume.
- 2Advanced: set the daily increase rate and starting day.
- 3Get the number of days to warm up and a day-by-day schedule.
Questions
Frequently asked
Why warm up a sending domain?
Mailbox providers distrust sudden volume from a new domain or IP. Ramping gradually builds reputation so your mail reaches the inbox instead of the spam folder.
How fast can I ramp?
A common rule is increasing ~25–50% per day while keeping bounces and complaints low. Send to your most engaged, verified contacts first during warmup.
Can I check a whole list at once?
This free tool checks one at a time. To verify a full list — email, phone and company together — upload a CSV to BounceBlock and preview your first 100 rows free.
Stop wasting hours on dead leads.
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