Plan Your Cold Email Infrastructure
Calculate the exact number of domains, mailboxes, and budget needed to hit your outreach targets. Adjust the sliders and watch your results update in real time.
Frequently Asked Questions
Set Up Your Sending Domains
Once you know how many domains you need, set them up with proper authentication.
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.