Using multiple inboxes across several domains is the safest way to scale cold email outreach. Here is how to figure out the right setup for your plan.
Why You Need Multiple Inboxes and Domains
More inboxes means more emails sent per day without triggering spam filters.
Multiple domains protect your reputation - if one domain has an issue, the others keep running.
Spreading sending across inboxes keeps your daily volume looking natural to email providers.
Prospi monitors warmup and sending limits for all your inboxes automatically.
Recommended Setup by Plan
$197/month - 9 inboxes, 3 domains
$397/month - 30 inboxes, 10 domains
$697/month - 60 inboxes, 20 domains
$897/month - 90 inboxes, 30 domains
How Many Emails Can You Send Per Inbox?
During warmup (first 2 weeks): 10 emails per inbox per day
After warmup: 20 emails per inbox per day
Total daily sending capacity once warmed up:
$197 plan (10 inboxes) - up to 180 emails/day
$397 plan (30 inboxes) - up to 600 emails/day
$697 plan (60 inboxes) - up to 1,200 emails/day
$897 plan (90 inboxes) - up to 1,800 emails/day
Sending too fast damages deliverability. Prospi automatically manages sending limits for you.
Where to Get Domains and Inboxes
Domains: Purchase directly in Prospi at $11/domain/year - fully configured for cold outreach.
Inboxes: Purchase through Prospi at $3.50/account/month (vs. $8.50 on standard Google Workspace).
Once set up, Prospi handles all warmup and deliverability optimization automatically.
