Mistake: running warm-up and live sends from the same mailbox at full volume

Mistake: running warm-up and live sends from the same mailbox at full volume
Most people leave Instantly or Smartlead warm-up cranked to 50/day, then layer 40 cold sends on top from the same inbox. Providers see a mailbox doing 90 messages with wild engagement swings and throttle it.

The fix: cap total daily touches per mailbox at 30-35 including warm-up, and taper warm-up as real volume climbs. Smartlead lets you set warm-up ramp independently; Instantly forces you to babysit the slider.

Pros / Cons of decoupling:
— Pro: deliverability holds because total throughput stays human
— Pro: cleaner reply-rate signal per mailbox
— Con: you need more inboxes to hit the same daily volume
— Con: more domains to buy and monitor

Verdict: 4/5. Treat warm-up as part of your daily budget, not a free bonus on top.

Who it's for: anyone scaling past 3 mailboxes who hasn't done the addition.