How many inboxes and domains do you need?
Enter your monthly volume. The calculator sizes the sending setup with spare inboxes, estimates the monthly cost, and shows when new inboxes finish warming up.
Your volume
Sending setup
- Emails per month
- Emails per sending day
- Active inboxes
- Spare inboxes
- Sending domains
- Estimated monthly cost
These figures come from the numbers you enter. They are planning estimates, not a promise of results. Reply and close rates depend on your list, your offer and your market.
The math, step by step
No hidden assumptions. Every number above comes from these steps.
- EmailsProspects per month × emails in the sequence.
- Active inboxesEmails per month ÷ (sends per inbox per day × sending days), rounded up.
- Spare inboxesExtra inboxes kept warm so one can be rested or replaced without pausing the campaign.
- DomainsTotal inboxes ÷ inboxes per domain, rounded up.
- CostInboxes × your cost per inbox, plus domain registration spread across 12 months.
FAQ
Plans start at $1,500/month. Compare plans.
Two or three per domain is a common setup. It keeps the volume on each domain low and limits the damage if one domain runs into trouble.
Plan on about two weeks before sending real campaigns from new inboxes. Warmup builds a normal sending history so mailbox providers trust the new domain.
Inboxes occasionally need a rest when their reputation dips. Warmed spares let you swap one out without dropping campaign volume or waiting two weeks for a replacement.
Let’s get your next reply.
Tell us who you want to reach. We’ll map the campaign, recommend a plan, and show you what the first month would look like.