Cold Email Infrastructure Calculator
Enter how many emails you want to send per day and see how many domains and mailboxes you need, with an estimated monthly cost.
How many emails do you want to send per day?
* Estimate only. Assumes 33 emails per mailbox per day, 3 mailboxes per domain, Google Workspace Business Starter pricing and a sending tool at about $125 per month. Microsoft 365 and other providers price differently. Prices checked October 2026 and may change. Our service charges are not included.
How the numbers are worked out
Each mailbox sends about 33 emails a day to protect your sender reputation, and each domain holds up to three mailboxes. The calculator rounds up so you never plan with too little capacity.
Estimates only
Prices are typical domain registration and Google Workspace rates plus a range for the sending tool. Your real costs depend on the providers and plans you choose.
Cold email calculator FAQ
How does the calculator work out domains and mailboxes?
It assumes each mailbox sends about 33 emails per day to protect your reputation, and each domain holds up to three mailboxes. Enter your daily target and it returns the domains and mailboxes you need.
Are the prices exact?
No. They are estimates based on typical domain registration and Google Workspace prices and on sending tool ranges. Your real costs depend on your providers and plans.
Why should I not send more per mailbox?
High volume from one mailbox is a common cause of spam folder placement. Spreading volume across several warmed-up mailboxes is safer.
Does it include lead and copywriting costs?
No. It covers sending infrastructure only: domains, mailboxes and the sending tool. Lists and copy are priced separately.
Can LeadNurturix set this up for me?
Yes. We handle domains, mailboxes, authentication and warm-up. Book a free call and we will size it for your target.