Every mailbox we operate sends at most about 25 cold emails a day. Some prospects hear that and frown - "that's it?" Then we explain what the cap buys, and why teams blasting 50,000 a month often book fewer meetings.
How a setup is built
- Lookalike sending domains (your brand domain never sends cold email)
- A few mailboxes per domain, each warmed for 3-4 weeks
- A hard cap of around 25 emails per mailbox per day
- About 20 sending days a month
How many domains and mailboxes? However many your goals need - the setup is sized on the strategy call and grows with you. What never changes is the per-mailbox cap, because every email goes out from a warmed mailbox behaving like a normal human seller.
Why the cap matters more than the total
Inbox providers don't just count how much you send - they count how much each mailbox sends. One account blasting 200 emails a day pattern-matches to a spammer. Nine accounts sending 25 each look like a sales team having a normal Tuesday.
The cap is what protects your placement. And placement is the whole game: a modest volume that lands in the primary inbox beats a huge one that lands in spam, every single time, in every metric that reaches your revenue.
Volume discipline is invisible when it works and catastrophic when it's missing.
Scaling without breaking the rule
Need more volume? You don't raise the cap - you add more domains and mailboxes, warm them for 3-4 weeks, and plug them into the rotation. Each increment is safe, monitored and reversible. And nobody, ever, runs a mailbox past its cap.
The takeaway
If your current vendor talks about volume but never mentions per-mailbox caps, warmup windows or placement testing, you now know exactly which questions to ask. Or skip the interrogation and let us run it - caps, warmup, monitoring and all.
Want this handled for you? Moongie runs managed cold email infrastructure, mixed email + LinkedIn outreach and high-converting landing pages. Book a free 30-minute strategy call - or win our playbook in the Inbox Run game.