Free email warmup schedule planner.
Enter your target volume per inbox and get the week-by-week ramp that reaches it without tripping alarms. New mailboxes earn trust slowly, and the schedule exists so that problems surface at fifteen sends a day, where they are cheap, rather than at thirty, where they are not.
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Warmup at a glance
| Item | Value |
|---|---|
| Starting volume | Around 2 sends per inbox per day |
| Growth rate | Roughly 80% per week, which is what a real team's mail growth looks like |
| Typical duration | Four to six weeks to full campaign volume |
| Target volume | About 30 sends per inbox per day, the envelope of a busy human |
| After full volume | Keep warmup running at reduced level. It is the only reliable positive engagement the domain gets |
What is inbox warmup?
Inbox warmup is the practice of raising a new mailbox's sending volume gradually, alongside traffic that generates opens and replies, so the mailbox builds a history before it sends anything that matters.
Providers score consistency and trajectory, not just volume. A mailbox created this morning that sends fifty messages this afternoon has produced a pattern no real mailbox makes, and it gets treated accordingly. The same mailbox reaching fifty a day over five weeks, with replies coming back the whole time, looks like a person who got busy.
The second function is diagnostic, and it is the one people skip. A ramp gives you checkpoints. If placement dips at fifteen a day, you find out while the fix is a pause and an adjustment. Discover the same problem at full volume and it is a reputation event across every domain you are running.
How to read your warmup schedule
The planner takes your target per inbox and the number of inboxes, and returns a week-by-week table.
The number of weeks comes first, along with the total daily volume across all inboxes once you arrive. That total is the number worth sanity-checking against your list size, because arriving at full volume with nobody left to email is a common and expensive mistake.
Each week's volume is per inbox per day, not per campaign. Multiply by your inbox count for the real figure.
The mode column is the part that matters most. Early weeks are warmup traffic only. Middle weeks mix warmup with light real sends. The final week is full campaign volume. Sending real campaign mail during the first mode defeats the purpose of having one.
The schedule assumes nothing goes wrong. It is a plan, not a commitment, and the correct response to a placement dip is always to hold rather than continue.
What happens in each phase
| Phase | Volume per inbox | What you are doing |
|---|---|---|
| Warmup pool only | From about 2 a day | No campaign mail at all. Building a baseline of sends that get opened and answered. |
| Warmup plus light real sends | Rising each week | Introducing real prospects at low volume, to your best-quality, most-verified segment. |
| Full campaign volume | Around 30 a day | Campaigns at target, warmup continuing underneath at reduced volume. |
| Steady state | Held at target | Volume stays flat. Growth comes from more inboxes, never from louder ones. |
Warning signs, and what each one means
| Sign | Likely cause | What to do |
|---|---|---|
| Placement drops mid-ramp | Content or list quality, far more often than the ramp itself. | Hold volume, do not step up. Fix the cause, then resume from where you paused. |
| Bounces appear during light real sends | The segment was not properly verified. | Stop that segment, re-verify, and do not resume until bounces are near zero. |
| One inbox underperforms the others | A single mailbox problem rather than a domain problem. | Pause that inbox only. This is what two or three inboxes per domain buys you. |
| Everything on one domain dips at once | A domain-level reputation problem. | Pause the whole domain. Check authentication and recent volume against the schedule. |
| Replies stop but sends look fine | Placement moved to spam without a bounce, which produces silence rather than errors. | Seed-test placement before assuming the copy stopped working. |
How to run a warmup without burning the domain
- Publish SPF, DKIM, DMARC and MX before the first send. Warming an unauthenticated mailbox builds the wrong history.
- Start at the schedule's first week and do not improvise upward. The ramp's value is entirely in not skipping it.
- Introduce real sends only at the mixed phase, and send them to your best-verified segment. The first real prospects should be the least likely to bounce.
- Check placement at every step up. This is the checkpoint the schedule exists to give you.
- Hold, never reverse, on a dip. Stay at the current volume until a clean week passes, then continue. Restarting from zero is rarely necessary.
- Keep warmup running after you arrive. Campaign replies are sparse by design, so warmup traffic is the only dependable positive engagement the domain has.
Common questions about inbox warmup
Why does the ramp start at two emails a day?
Because a brand new mailbox sending fifty on its first day is not a pattern any real mailbox makes. Starting at two and growing around 80% a week mimics how a real team's mail grows, and keeps engagement high while the volume is still small enough to fix cheaply.
Can I shorten warmup if I am in a hurry?
You can, and it is a reliable way to burn domains that took two months to build. The schedule exists so problems surface at 15 sends a day, where they are recoverable, instead of at 30, where they are a reputation event.
Do I keep warmup running after reaching full volume?
Yes, at a reduced level. Warmup traffic is the only dependable positive engagement your sending domains get, because campaign replies are sparse by design. Switching it off at full volume removes the signal holding the reputation up.
What do I do if placement drops mid-ramp?
Hold at the current volume instead of stepping up. Mid-ramp drops usually trace to content or list quality rather than the ramp itself. Fix the cause, hold for a clean week, then resume the schedule from where you paused rather than restarting.
Does warmup software actually work?
It builds sending history and engagement signals, which is real and useful. What it cannot do is make a bad list or a bad message land, and a mailbox with a perfect warmup record will still lose placement once it starts bouncing. Treat it as the floor rather than the strategy.
Should every inbox warm up separately?
Yes. Reputation is scored per mailbox as well as per domain, so a new inbox added to an established domain still needs its own ramp. That is also why adding capacity takes weeks rather than minutes, and why the inbox count should be planned before a campaign rather than during one.