Infrastructure Calculator

Calculate exactly how many domains and inboxes you need for your send volume

5,000
3
2
1

Active inboxes needed

100

15 sends/day × 1,500 daily sends

Backup inboxes (30%)

30

Rotate in if active inboxes show issues

Domains needed

34

Max 3 inboxes per domain

Total monthly sends

30,000

5,000 leads × 3 touches × 2 campaigns

Infrastructure summary

→44 total domains (34 active + 10 backup domains)
→130 total inboxes (100 active + 30 backup)
→15 sends per inbox per day on Google Workspace
→30,000 monthly sends across 1 client

Need 130 inboxes?

Setting up 100 active inboxes from scratch means weeks of warmup before you can send at full capacity. Pre-warmed inboxes skip the ramp — ready to send from day one.

WarmInboxes — pre-warmed inboxes and domains