How Many Inboxes & Domains Do I Need?

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.

Your Prospi plan determines how many inboxes you need for optimal outreach:

💰 Gold Plan → 10 inboxes & 4 domains
🚀 Platinum Plan → 30 inboxes & 10 domains
💎 Diamond Plan → 60 inboxes & 20 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.

📌 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:

Sending too many emails too fast will damage deliverability and lower response rates, which is why Prospi automatically manages sending limits for you.

📌 Domains: You need to purchase domains separately from providers like GoDaddy, Porkbun, or Namecheap, then share access with Prospi for configuration.

📌 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.