Plan Your Outreach
Adjust the sliders and see your domain count, mailbox count, monthly cost, and warmup timeline update live.
Frequently Asked Questions
The number of domains depends on your daily email volume. A common setup is 4 mailboxes per domain, each sending 25 emails/day (100 emails per domain). For 2,000 emails/day, you would need about 20 domains. Use this calculator to find your exact number based on your sending goals.
Why You Need an Email Scaling Calculator
Cold email outreach requires careful infrastructure planning. Sending too many emails from too few domains damages your sender reputation and tanks deliverability. Sending too few wastes money on unused infrastructure. This calculator helps you find the sweet spot.
The key variables are emails per mailbox per day (keep this between 15-30 for safety), mailboxes per domain (2-5 is standard), and your total daily sending volume. From there, the math determines exactly how many domains and mailboxes you need, plus the total cost.
