Warmerly
Stays at the ceiling after day 30 while warmup is on.
Warmerly
Warmbox
One-to-one · Warming after the ramp
Warming after the ramp
One row, in depth: what each tool does, the verified numbers, and who each suits.
Warmbox details read from its pricing, home, features, agency and checker pages and its help centre on 21 October 2026.
Warmerly
Stays at the ceiling after day 30 while warmup is on.
Warmbox
A maintenance mode after warm-up, with a controlled volume (no figure); can be switched off.
The short answer
Warming after the ramp, in one look.
Warmerly and Warmbox both keep warming after the first weeks. Warmerly keeps the mailbox at its ceiling after day 30 while warmup stays on: graduating from aging to active changes the label, not the volume. Warmbox moves into a maintenance mode that sends a controlled volume to its private network, and says you can switch it off. Last checked 22 October 2026.
Warmbox
A maintenance mode after warm-up, with a controlled volume (no figure); can be switched off.
The picture
Drawn side by side.
After the first weeks
An example calendar. The window is not a promise
WarmerlyWarmbox
WarmerlyRamp to 50 a day by day 30, then held at the ceiling while warmup is on
StartLater
WarmboxWarm-up, then maintenance mode
Warmbox gives no volume for its maintenance mode and says it can be switched off. On Warmerly the label changes from aging to active, not the volume.
Why each keeps going
As each describes it
WarmerlyWarmbox
Steady activity
- Graduation changes the label, not the volume
- A warmed mailbox is not reset to day 0
- Pause it any time
Consistency
- "Consistency is the most important signal"
- A controlled volume to its private network
- Deactivate at any time
Warmbox's claimed benefits have no figures or tests behind them on the page.
How Warmerly does it
Warmerly, in detail.
Warmup stays on at the ceiling while it is enabled.
01
Graduation changes the label, not the volume
A mailbox moves from aging to active after 30 days of real sending. Nothing functional changes: the daily volume still comes from the ramp curve.
Warmerly product, checked 21 October 2026
02
The ceiling stays at 50 a day
Past day 30 the quota is 50 a day, held to 40 on Gmail and 30 on Outlook. A fully warmed mailbox is not dropped back to day 0.
Warmerly product, checked 21 October 2026
03
Ongoing health checks
Health scoring and spam rescue keep running while warmup is on.
Warmerly product, checked 21 October 2026
04
You can pause it
Warmup can be paused on a mailbox, which stops its warmup sends.
Warmerly product, checked 21 October 2026
05
Warmup runs on after launch
Warmup is not a setup step to finish. The docs say to keep it on after campaigns start, as the background activity that keeps the mailbox healthy.
Warmerly product, checked 21 October 2026
06
A graduation label
An hourly job moves a mailbox from ageing to active once it has 30 sending days, as long as warmup is on and it needs no reconnect. Both states warm in the same way.
Warmerly product, checked 21 October 2026
07
Days that really sent
The ramp counts days on which the mailbox sent at least one warmup email, not calendar age. A mailbox connected months ago that never sent starts low.
Warmerly product, checked 21 October 2026
08
A paused mailbox resumes
A health score under 60 for two days pauses the mailbox, which resumes automatically after a three-day cooldown.
Warmerly product, checked 21 October 2026
09
Health still adjusts it
After graduation, a low health score or spam placement still cuts the day's quota, so continuous warming is not a fixed volume.
Warmerly product, checked 21 October 2026
10
Weekends stay lighter
Weekend days run at 60% of the weekday quota, in the mailbox's own time zone.
Warmerly product, checked 21 October 2026
11
Alerts keep watching
A health score that falls 15 points or more, a disconnection, DNS changes and a blocklisting raise alerts after graduation too.
Warmerly product, checked 21 October 2026
12
Records re-checked every six hours
SPF, DKIM and DMARC are checked every six hours across every mailbox that is not dead or paused.
Warmerly product, checked 21 October 2026
How Warmbox does it
Warmbox, in detail.
A maintenance mode after warm-up, with a recommendation to keep it on.
01
Maintenance mode
After warm-up, Warmbox moves automatically into a maintenance mode that continues sending "a controlled volume of emails to our private network".
help.warmbox.ai/en/articles/4829873-the-power-of-continuous-warming · read 21 October 2026
02
Consistency
The article says "Consistency is the most important signal for a healthy sender score" and warns that large swings in sending may lead providers to flag an account.
help.warmbox.ai/en/articles/4829873-the-power-of-continuous-warming · read 21 October 2026
03
Claimed benefits
It claims no gaps in activity, positive signals that may offset some real emails being marked as spam, and a better chance of the Primary inbox.
help.warmbox.ai/en/articles/4829873-the-power-of-continuous-warming · read 21 October 2026
04
Switch-off
It says you can deactivate the process at any time, and recommends keeping it on.
help.warmbox.ai/en/articles/4829873-the-power-of-continuous-warming · read 21 October 2026
05
Always warm up
The help article tells readers to always warm up and describes keeping Warmbox active in the background as a steady cruising pace for the inbox.
help.warmbox.ai/en/articles/4829873-the-power-of-continuous-warming · read 22 October 2026
06
Dated advice
The continuous warming article is dated 23 February 2026, so this is current guidance rather than an old page.
help.warmbox.ai/en/articles/4829873-the-power-of-continuous-warming · read 22 October 2026
07
Never turn it off during campaigns
The what-is-Warmbox article says never to turn off warm-up while sending cold emails, and calls it a constant shield for your sender score.
help.warmbox.ai/en/articles/4803427-what-is-warmbox · read 22 October 2026
08
Stopping may hurt
The how-long article says stopping the process entirely may cause engagement signals to drop and providers to view the account with fresh suspicion.
help.warmbox.ai/en/articles/5103657-how-long-does-it-take-to-warm-up-an-inbox · read 22 October 2026
09
The timing range ends, warming does not
The timing article says that when the range ends Warmbox keeps sending emails from your inbox to keep it warm, under the name always warm-up.
help.warmbox.ai/en/articles/4803471-set-up-warm-up-timing · read 22 October 2026
10
Flat for maintenance
The Flat recipe is described as suited to an inbox that is already warm and needs to maintain high deliverability.
help.warmbox.ai/en/articles/4803460-flat-warm-up · read 22 October 2026
11
Time to results
The pricing FAQ says it usually takes 15 to 30 days of warming without interruption to see first results. The help article says most users see the full benefit within 30 to 50 days, and up to 90 in some cases.
warmbox.ai/pricing · read 22 October 2026
12
Paused connections
The troubleshooting articles say a campaign can pause when the connection to the provider is interrupted, and that Google sign-in can need a refresh every few weeks. An app password is recommended.
help.warmbox.ai/en/articles/13859617-troubleshooting-paused-campaigns · read 22 October 2026
What Warmbox does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- How large the maintenance volume is
- Evidence for the claimed benefits
- The volume sent in maintenance mode
- Whether maintenance mode follows your real sending
- Any cost difference between warming up and maintenance
Where the sources disagree
We report each version rather than pick one.
- Warmbox gives 15 to 30 days to first results on its pricing page, and 30 to 50 days for the full benefit, up to 90, in its help centre. We show both and treat them as its own estimates.
The numbers
Only what we could verify.
| Measure | Warmerly | Warmbox |
|---|---|---|
| Warming after the ramp | Stays at the ceiling after day 30 while warmup is on. | A maintenance mode after warm-up, with a controlled volume (no figure); can be switched off. |
| Warmup after day 30 | Continues at the ceiling | Continues in maintenance mode |
| Volume after the ramp | 50 a day, held to 40 on Gmail | "A controlled volume", no figure |
| Can you turn it off | Yes, pause warmup | Yes, at any time |
| Warmup after the first weeks | Continues, same ramp ceiling | Continues, maintenance mode |
| Days to reach full volume | 30 sending days | Not stated; results in 15 to 30 or 30 to 50 days |
| Longest time to results it states | Not stated | Up to 90 days |
| Advice on stopping while sending | Keep it on | Never turn it off while sending |
| Automatic pause on poor health | Yes, health under 60 for two days | Not stated |
| Automatic resume | After a three-day cooldown | Not stated |
| Minimum warm-up length it suggests | 30 sending days to graduate | 45 days on its Grow recipe |
| Where the timing range ends | No end date, runs until paused | Continues sending after the range ends |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Leave warmup running while you send
Both tools say steady activity matters. Stopping warmup once campaigns start is the usual way to lose what you built.
Ask for the number
Warmbox does not say how big its maintenance volume is. Warmerly's ceiling is published.
Plan for a month, not a week
Warmerly's ramp takes 30 sending days to reach its ceiling. Warmbox gives three different time ranges: 15 to 30 days for first results, 30 to 50 days for the full benefit and up to 90 days in some cases. Neither is quick, and neither is a guarantee.
Do not stop when campaigns start
Both companies say to leave warm-up on while you send. If you stop, activity goes from steady to uneven, which is the pattern Warmbox says providers may treat as suspicious.
The maintenance volume matters
Warmbox does not say how big maintenance mode is. On a plan with 50 emails a day it may be small. Ask before you assume it matches your needs.
Connections break more than ramps
For both tools, the common reason for a warm-up to stop is a broken connection. Warmbox's own articles say Google sign-in can pause campaigns after a security refresh and recommend an app password.
Keep the DNS healthy too
Warmup keeps activity steady, but it does not fix missing SPF, DKIM or DMARC records. Warmerly re-checks these every six hours. Warmbox lists a live checker, and you can run it yourself.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want the volume after the ramp stated as a number
- You want the post-ramp volume written down: a ceiling of 50 a day, held to 40 on Gmail
- You want a mailbox paused and resumed automatically when its health drops
- You want alerts for disconnects, DNS changes and blocklists after graduation
- You want warmup that continues on every plan with no extra setting
- You want the graduation rule published
Warmbox
Warmbox is the better fit if
- You want a named maintenance mode after warm-up
- You want the reasoning for continuous warming written in its help centre
- You want a named maintenance mode that follows the warm-up automatically
- You want a help article that explains why continuous warming matters
- You want to choose a Flat recipe for an inbox that is already warm
- You want advice that says exactly how long first results may take, up to 90 days
- You want to switch it off at any time and be told the risk
Questions
What happens to warmup after day 30?
Warmerly continues at its ceiling, 50 a day and held to 40 on Gmail. Warmbox continues in maintenance mode at a controlled volume with no figure.
Can I switch warmup off?
Yes on both, but both advise against it while sending.
How long until full volume?
Warmerly reaches it in 30 sending days. Warmbox states results in 15 to 30 or 30 to 50 days, and up to 90 at most.
Does Warmerly pause a weak mailbox?
Yes, when health is under 60 for two days. It resumes after a three-day cooldown.
What minimum length do they suggest?
Warmerly graduates a mailbox after 30 sending days. Warmbox suggests 45 days on its Grow recipe.
Sources
- Warmbox help: the power of continuous warming
- Warmbox help: how long does it take
- Warmbox help: set up warm-up timing
- Warmbox help: paused campaigns
- Warmbox pricing
Warmbox pages were read on 21 October 2026. Plans and wording change, so check the vendor's own page before you decide. Warmerly details come from the product as it runs today.
More features
See it on your own mailbox.
Connect a mailbox. Warmerly runs alongside whatever you send from now, so you can compare before you move anything.
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