How many cold emails can you send per day safely?
Cap a single mailbox at ~30–50 cold emails/day after warmup. To scale, add mailboxes and rotate — don't push one inbox harder. Here's the math and the safe ramp.
Short answer: hold a single warmed mailbox to roughly 30–50 cold emails per day. Want more? Add mailboxes and rotate across them. Pushing one inbox past ~50/day is the fastest way to wreck its reputation. Volume comes from *more mailboxes*, never a hotter one.
The math
10 mailboxes × 40/day = 400 cold sends a day, safely, because every inbox stays under its own ceiling. Push those same 400 through one mailbox and it gets flagged.
The safe ramp
- Warm each new mailbox over ~21 days (how-to).
- Cap each mailbox at 30–50/day once it's warmed.
- Rotate sends across the pool, keeping every inbox's daily count even.
- Watch bounces per mailbox and auto-pause at 2.5%.
How Autocloz handles it
Autocloz holds per-mailbox daily caps, paces with a minimum gap between sends, and rotates the pool for you. Free covers 50 warmed mailboxes; paid goes unlimited.
> Start free — connect a pool of mailboxes and let Autocloz pace and rotate them safely.