Inbox Volume Calculator
Sending too much from too few inboxes is the fastest way to land in spam. Enter your monthly volume and we'll size the inboxes and domains you need to send safely at scale.
Sending on weekends?
45
inboxes needed
15
domains needed
9,000
emails / month
450
emails / day
How we got there
- 3,000 prospects × 3 emails = 9,000 emails / month
- 9,000 ÷ 20 sending days = 450 emails / day
- 450 ÷ 10 per inbox = 45 inboxes
- 45 ÷ 3 inboxes per domain = 15 domains
Assumes 10 emails per inbox per day, 3 inboxes per domain, and 20 weekdays per month — the deliverability-safe defaults we run on.
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