WarmerlyWarmerly ahead on this row
On every mailbox: threaded conversations with quoted replies, and spam rescue.
Warmerly
Dux-Soup
One-to-one · Mailbox warmup
Mailbox warmup
One row, in depth: what each tool does, the verified numbers, and who each suits.
Dux-Soup details read from its pricing page, home page, integrations and feature pages and help centre on 22 October 2026.
Warmerly
On every mailbox: threaded conversations with quoted replies, and spam rescue.
Dux-Soup
Not listed. Its pages describe LinkedIn pacing, not mailbox warmup.
The short answer
Mailbox warmup, in one look.
Warmerly warms every mailbox before and while it sends: 4 a day on day 0 rising to 50 a day by day 30, cut by provider caps, weekends and health. Dux-Soup lists no mailbox warmup, and its pacing controls are for LinkedIn accounts. Last checked 22 October 2026.
Dux-Soup
Not listed. Its pages describe LinkedIn pacing, not mailbox warmup.
The picture
Drawn side by side.
The ramp, drawn
Warmup emails a day, per mailbox, over 30 days
WarmerlyDux-Soup
- Warmerly: 4 a day at day 0, 8 at day 3, 15 at day 7, 25 at day 14, 35 at day 21, 50 at day 30, cut by provider caps (Gmail 40, Outlook 30, Zoho 25).
- Dux-Soup: no mailbox warmup is listed. Its pacing controls are for LinkedIn accounts.
Lines are drawn from Warmerly's anchor points. Weekends, spam placement and health cut the real number further.
What each one paces
From each side's own description
WarmerlyDux-Soup
Warmerly
A mailbox ramp, 4 to 50 a dayProvider capsWeekend and health cutsThe reason for today's limit is named
Dux-Soup
LinkedIn pauses and delaysDaily limitsAuto-snooze at the limitA planner for working hours
Warmerly's LinkedIn warmup is a separate feature of the LinkedIn add-on. It does not warm a mailbox.
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
Warmerly warms each mailbox on a ramp set by Warmerly: 4 a day at day 0, 50 a day by day 30, then cut by provider cap, weekends, spam placement and health. Warmup sends are not a billing meter, but every mailbox follows the ramp.
01
The ramp, from anchor points
The daily quota is interpolated between anchors: 4 a day at day 0, 8 at day 3, 15 at day 7, 25 at day 14, 35 at day 21 and 50 at day 30. It counts days the mailbox really sent, so a paused or newly enabled old mailbox cannot skip ahead. Domain age is not an input.
Warmerly product, checked 22 October 2026
02
The ceiling is the lowest of three limits
The quota is the lowest of the age ramp, the provider cap and the hard ceiling of 50 a day. Provider caps are Gmail 40, Outlook 30 and Zoho 25. Worked through the ramp, a Zoho mailbox reaches its cap of 25 at day 14, an Outlook mailbox passes 30 at day 18 and a Gmail mailbox reaches 40 at day 24.
Warmerly product, checked 22 October 2026
03
Weekends and health cut it further
Weekends run at 0.6 of the weekday quota, measured in the mailbox's own timezone, so a mature mailbox on the 50 ceiling plans 30 on a weekend, a mature Gmail mailbox 24, Outlook 18 and Zoho 15. A spam placement score of 20 or more multiplies the quota by 0.4 and 10 or more by 0.7. A health score below 50 multiplies it by 0.4 and below 70 by 0.75. The lower of the two reductions applies.
Warmerly product, checked 22 October 2026
04
The reason for today's limit is named
The capacity calculation returns a named limiting factor for each mailbox (age, provider, hard cap, health, weekend, your own daily limit and others) and the warmup page reads it. You can set a lower daily warmup limit yourself. A free sandbox mailbox is capped at 3 a day.
Warmerly product, checked 22 October 2026
05
What it does not do
Warmup does not warm a LinkedIn profile: LinkedIn account warmup is a separate feature of the LinkedIn add-on.
Warmerly product, checked 22 October 2026
06
Warmup runs from a pool of real mailboxes
Warmup mail goes between Warmerly mailboxes and replies quote the earlier message, so the exchange reads as a conversation. A mailbox that lands in spam is rescued: the receiving mailbox marks it not spam and moves it to the inbox.
Warmerly product, checked 22 October 2026
07
The sandbox is capped
A free sandbox mailbox runs at 3 warmup sends a day, separate from the one mailbox Free lets you connect.
Warmerly product, checked 22 October 2026
How Dux-Soup does it
Dux-Soup, in detail.
Dux-Soup has no mailbox to warm on the pages we read. Its safety tools pace a LinkedIn account instead, with random visit speeds, pauses and daily limits.
01
No mailbox warmup is listed
Its home and pricing pages describe LinkedIn actions and list no email warmup.
dux-soup.com · read 22 October 2026
02
LinkedIn pacing instead
Its safety features are natural activity patterns with pauses, delays and breaks, built-in daily limits, smart speed throttling, auto-snooze and a daily planner.
dux-soup.com · read 22 October 2026
03
Beginners start lower
The help article suggests around 5 to 10 connection requests a day for beginners and recommends leaving the defaults unchanged, especially on new accounts.
support.dux-soup.com/article/770-default-daily-limits-and-automation-speed-in-stacked · read 22 October 2026
04
Random mode paces profile visits
Profile visits run at between 25 and 125 an hour, with a pause of 5 minutes after every 20 visits.
support.dux-soup.com/article/770-default-daily-limits-and-automation-speed-in-stacked · read 22 October 2026
05
A planner sets working hours
Its safety page says a daily planner sets when STACKED runs, including custom working hours and breaks.
dux-soup.com/product/features/account-safety · read 22 October 2026
06
Five named safety controls
The home page calls them five built-in controls: natural activity patterns, daily limits with a gradual ramp, smart speed throttling, auto-snooze and a daily planner.
dux-soup.com · read 22 October 2026
07
Detail it keeps private
Its safety page says the specifics of its continuous safety engineering are confidential, by design.
dux-soup.com/product/features/account-safety · read 22 October 2026
What Dux-Soup does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- A mailbox warmup feature
- A ramp-up schedule for a new LinkedIn account
- Any email warmup, inbox placement or spam rescue
- The exact ramp used for a new LinkedIn account
The numbers
Only what we could verify.
| Measure | Warmerly | Dux-Soup |
|---|---|---|
| Mailbox warmup | On every mailbox: threaded conversations with quoted replies, and spam rescue. | Not listed. Its pages describe LinkedIn pacing, not mailbox warmup. |
| First day of warmup | 4 a day, per mailbox | Not applicable, no mailbox warmup listed |
| Day 30 of warmup | 50 a day, per mailbox | Not applicable |
| Gmail, Outlook, Zoho caps | 40, 30 and 25 a day | Not applicable |
| Mailboxes warmed | 1 Free, 5 Starter, 25 Growth, 100 Agency | None listed |
| A new LinkedIn account's first requests | 5 a day on days 1 to 3 | 5 to 10 a day suggested |
| Warmup that counts days actually sent | Yes, a paused mailbox does not skip ahead | Not applicable |
| Weekend setting | 0.6 of the weekday quota | Planner hours and breaks, per its safety page |
| Warmup volume at day 14 | 25 a day, before provider caps | Not applicable |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
If you send cold email, warm the mailbox somewhere
Dux-Soup lists no warmup, so the mailbox you send from needs it from another tool.
A LinkedIn account has its own ramp
Warmerly's LinkedIn warmup is a separate add-on feature, not mailbox warmup.
Warming takes about 30 days to reach 50 a day
A ramp starts small on purpose.
A Gmail mailbox over a month
Day 0 is 4 sends a day and day 7 is 15. The provider cap for Gmail is 40, which the ramp reaches on day 24, and the hard ceiling of 50 on day 30. Over the first 30 days the quota rises about 1.5 sends a day each day (our arithmetic: 46 more over 30 days).
A Zoho mailbox
The Zoho cap of 25 is reached at day 14, so its quota stays at 25 even when the ramp would give 35 on day 21. The warmup page names the limit as provider.
A weekend
A mature Gmail mailbox plans 40 on a weekday and 24 on a weekend, which is 0.6 of 40 (our arithmetic). A spam placement score of 20 or more cuts the quota by 60 per cent.
LinkedIn pacing is not email warmup
Dux-Soup's 5 minute pause after 20 visits slows LinkedIn activity. It does nothing for a sending domain's reputation, which is what mailbox warmup builds.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You send cold email from new or cold mailboxes
- You want the reason for each day's limit shown
- You want warmup that is not metered
- You send cold email and care where it lands
- You want the daily limit explained
- You want warmup that does not need a laptop on
Dux-Soup
Dux-Soup is the better fit if
- You send only on LinkedIn and have no mailbox to warm
- You want LinkedIn pacing with auto-snooze
- You already warm mailboxes elsewhere
- You only use LinkedIn and want safe pacing
- You want to set working hours for activity
- You want randomised visit speeds
Questions
Does Dux-Soup warm up email mailboxes?
Not as a feature on the pages we read. Its safety tools pace LinkedIn activity. Dux-Soup may offer something we did not find, so check with them.
How does Warmerly warm a mailbox?
With threaded warmup emails from a pool of mailboxes, answered automatically, on a ramp from 4 a day on day 0 to 50 a day on day 30, cut by provider caps, weekends and health.
Does Dux-Soup warm up email?
We found no mailbox warmup on its pages. Its safety features pace LinkedIn activity.
How long does Warmerly warm a mailbox?
Over 30 days the daily quota climbs from 4 to 50, cut by provider caps, weekends and health.
Is LinkedIn warmup part of mailbox warmup?
No. LinkedIn account warmup is a separate feature of the LinkedIn add-on.
Sources
Dux-Soup pages were read on 22 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.
Free plan, no card. Paid plans: 7-day trial, first charge on day 8.