Why You Need Multiple Inboxes & Domains
When sending cold emails, using a single inbox is risky and inefficient. To maximize deliverability, sending volume, and inbox reputation, Prospi recommends using multiple inboxes across several domains.
✅ More inboxes = More emails sent per day without spam risks
✅ More domains = Better reputation & reduced chance of blacklisting
✅ Spreading emails across multiple inboxes keeps sending natural
Each inbox is warmed up and monitored automatically inside Prospi, so you don’t have to manage everything manually.
Inbox & Domain Requirements Based on Prospi Plans
Your Prospi plan determines how many inboxes you need for optimal outreach:
$197 → 10 inboxes & 4 domains
$397 → 30 inboxes & 10 domains
$697 → 60 inboxes & 20 domains
$897 → 90 inboxes & 30 domains
📌 Why multiple domains?
Using multiple domains allows you to scale outreach while avoiding domain reputation issues. For example, if one domain starts experiencing deliverability issues, you still have backups running smoothly.
How Many Emails Can I Send Per Inbox?
📌 To protect your inbox reputation, you should gradually increase your daily sending volume:
🔹 First 2 weeks (during warmup): 10 emails per inbox per day
🔹 After warmup: 20 emails per inbox per day
With the recommended inboxes per plan:
$197: Up to 200 emails/day
$397: Up to 600 emails/day
$697: Up to 1,200 emails/day
$897: Up to 1,800 emails/day
Sending too many emails too fast will damage deliverability and lower response rates, which is why Prospi automatically manages sending limits for you.
Where Do I Buy Domains & Inboxes?
📌 Domains: You can buy domains directly inside Prospi, which are fully configured for cold outreach at $11/domain/year
📌 Inboxes: You can buy inboxes directly inside Prospi, which are fully configured for cold outreach at $3.50/account/month (vs. the regular $8.50 for Google Workspace).
Once your domains and inboxes are set up, Prospi will handle all warmup and deliverability optimization automatically.