The Simple Formula
Domains needed = Daily email target / 20
That's it. Each domain can safely send 20 emails per day once fully warmed up.
Common Volume Targets
| Daily Emails | Domains Needed | Mailboxes (2 per domain) |
|---|---|---|
| 50 | 3 | 6 |
| 100 | 5 | 10 |
| 200 | 10 | 20 |
| 500 | 25 | 50 |
| 1,000 | 50 | 100 |
Why 10 Domains Minimum?
Even if you only need 100 emails/day (5 domains), we recommend 10 domains minimum for three reasons:
- Redundancy - If 2 domains get flagged, you still have 80% capacity
- Testing - You can A/B test messaging across domains
- Scaling - Ready to increase volume without waiting for new domain warmup
Scaling Math Example
Goal: Send 6,000 emails per month
- 6,000 / 30 days = 200 emails/day
- 200 / 20 per domain = 10 domains needed
- 10 domains × 2 mailboxes = 20 mailboxes total
- Setup cost: $299 (includes 10 domains + Microsoft 365 licenses)
When to Add More Domains
Add domains when you want to:
- Increase volume - Each new domain = 20 more daily emails
- Replace flagged domains - Rotate out underperforming domains
- Enter new markets - Fresh domains for new ICP segments
Expansion Pricing
Each expansion pack ($199) includes:
- 10 additional domains
- Microsoft 365 licenses
- Up to 10,000 more leads
Key Takeaway
Start with 10 domains minimum. Each domain safely handles 20 emails/day once warmed up. More domains = more capacity + more redundancy.