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: keep a single warmed mailbox to roughly 30–50 cold emails per day. To send more, add more mailboxes and rotate across them — pushing one inbox past ~50/day is the fastest way to wreck its reputation. Volume comes from *more mailboxes*, not a hotter one.
The math
10 mailboxes × 40/day = 400 cold sends/day, safely, because each inbox stays under the per-mailbox ceiling. One mailbox at 400/day = flagged.
The safe ramp
- Warm up each new mailbox over ~21 days (how-to).
- Cap per mailbox at 30–50/day post-warmup.
- Rotate sends across the pool; keep each inbox's daily count even.
- Watch bounces per mailbox; auto-pause at 2.5%.
How Autocloz handles it
Autocloz enforces per-mailbox daily caps + min-gap pacing and rotates across your pool automatically. Free includes 50 warmed mailboxes; paid is unlimited.
> Start free — connect a pool of mailboxes and let Autocloz pace + rotate them safely.