WarmerlyWarmerly ahead on this row
Campaigns and sequences from Gmail, Outlook, Zoho or any SMTP and IMAP mailbox, with 13 kinds of pre-launch check.
Warmerly
Dux-Soup
One-to-one · Email outreach
Email outreach
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
Campaigns and sequences from Gmail, Outlook, Zoho or any SMTP and IMAP mailbox, with 13 kinds of pre-launch check.
Dux-Soup
Not listed on its home or pricing pages.
The short answer
Email outreach, in one look.
Warmerly sends cold email from Gmail, Outlook, Zoho or any SMTP and IMAP mailbox, with a daily limit per mailbox, a volume ramp, a bounce brake and 13 kinds of pre-launch check. Dux-Soup's home and pricing pages list no email outreach. Last checked 22 October 2026.
Dux-Soup
Not listed on its home or pricing pages.
The picture
Drawn side by side.
Mailboxes you can connect
As each side lists them
WarmerlyDux-Soup
WarmerlyFour kinds
- GmailGoogle sign-in or app password
- OutlookMicrosoft sign-in
- ZohoConnects
- SMTP and IMAPAny mailbox
Dux-SoupNo email sending listed
- Email stepsNot listed
- MailboxesNot listed
- Address FinderCredits, one per address found
Dux-Soup's Address Finder looks addresses up; its pages list no way to send email from them. It may offer something we did not find.
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
A full email campaign engine: sequence steps, scheduling, a 30 a day default per mailbox, a ramp from 3 to 15 a day, a bounce brake from 2 per cent, and 13 kinds of pre-launch check.
01
A daily limit per mailbox: 30 by default
Each mailbox has its own daily campaign limit, 30 by default. A campaign has its own daily limit field too, also 30 by default. Sending is not metered on paid plans: what bounds volume is mailboxes times each mailbox's daily limit. The Free plan allows 100 campaign sends a month.
Warmerly product, checked 22 October 2026
02
A volume ramp from 3 to 15 a day
A campaign can ramp each mailbox from 3 emails on sending day 1, adding 1 a day, up to 15 by default, so full volume arrives on the 13th sending day. It is switched on automatically for young mailboxes. A sending day means a day in the campaign's sending days, so weekends hold the cap flat. The ramp can only tighten a mailbox's own limit, never raise it.
Warmerly product, checked 22 October 2026
03
A bounce brake before the pause
Over a rolling 7 days, below 2 per cent bounces a mailbox is untouched. From 2 per cent its daily cap is multiplied by 0.75, from 3 per cent by 0.5 and from 5 per cent by 0.25. At 7 per cent the mailbox is paused. A campaign also pauses when 30 per cent of the leads it tried were rejected outright. None of it applies under 25 sends.
Warmerly product, checked 22 October 2026
04
13 kinds of pre-launch check
The readiness table in the pre-flight doc lists 13 kinds of check before Start: 7 that block (no usable step, plan gate, no sender, no queued leads, unknown merge tag, missing brief for an AI opener, failed AI provider probe) and 6 that warn (no postal address, thin lead research, DNS warn or fail or more than 5 senders on one domain, a free mailbox still waiting, no tracking domain for the unsubscribe link, spam-style copy). A warning needs one acknowledgement.
Warmerly product, checked 22 October 2026
05
Mailbox connections
Warmerly connects Gmail, Outlook, Zoho or any SMTP and IMAP mailbox, with Google and Microsoft sign-in. It also has hosted mailboxes.
Warmerly product, checked 22 October 2026
06
Unsubscribes and bounces are handled for every send
Every campaign email carries an unsubscribe link and one-click headers. Hard bounces and unsubscribes go on suppression lists that the engine checks immediately before each send.
Warmerly product, checked 22 October 2026
07
A postal address warning
If the workspace has no postal address, a campaign that sends email shows a warning before launch, because CAN-SPAM and CASL expect one in the footer. It no longer blocks the send.
Warmerly product, checked 22 October 2026
How Dux-Soup does it
Dux-Soup, in detail.
On the pages we read, Dux-Soup does not send email. It can look addresses up.
01
No email in its action list
The actions are Endorse, Follow, InMail, Connect, Message, Visit and Like a post.
dux-soup.com/pricing · read 22 October 2026
02
No email feature on its home page
The home page lists drip campaigns, AI personalisation, insights, an inbox, integrations and account safety, and no email sending.
dux-soup.com · read 22 October 2026
03
An Address Finder for emails
For 2nd and 3rd-degree prospects it looks up an email address using lookup credits, by hand or through a drip campaign.
support.dux-soup.com/article/775-can-stacked-find-email-addresses-for-linkedin-prospects · read 22 October 2026
04
1st-degree connections' emails are captured
The help article says STACKED can capture the email addresses available for 1st-degree connections.
support.dux-soup.com/article/775-can-stacked-find-email-addresses-for-linkedin-prospects · read 22 October 2026
05
Found addresses join the prospect data
Addresses are added to the prospect data STACKED captures, for use in prospecting and export workflows.
support.dux-soup.com/article/775-can-stacked-find-email-addresses-for-linkedin-prospects · read 22 October 2026
06
Its team page shows email only as a field
The team page lists a contact's email 'if available' inside a Teams message, which is a lookup result, not an email send.
dux-soup.com/solutions/i-am/team · read 22 October 2026
07
The AI personalisation page names no email
Its messaging page covers direct messages, InMail and Open Profile messages, all on LinkedIn.
dux-soup.com/product/features/messaging · read 22 October 2026
08
Email addresses can be exported
Prospect data, including emails captured, can go to CSV or to a CRM, per its lead management page, so email sending would happen in another tool.
dux-soup.com/product/features/lead-management · read 22 October 2026
09
No email article in the help centre list
The help centre list we read shows no article on connecting a mailbox, sending email or handling bounces.
support.dux-soup.com · 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.
- Email steps in a campaign
- Connecting a sending mailbox
- Daily email limits
- Bounce handling
- An email step, a mailbox connection or a send limit anywhere on its pages
- An unsubscribe link or suppression list
The numbers
Only what we could verify.
| Measure | Warmerly | Dux-Soup |
|---|---|---|
| Email outreach | Campaigns and sequences from Gmail, Outlook, Zoho or any SMTP and IMAP mailbox, with 13 kinds of pre-launch check. | Not listed on its home or pricing pages. |
| Email steps in a campaign | Yes, in the same sequence as LinkedIn | None listed |
| Mailboxes you can connect | Gmail, Outlook, Zoho, SMTP and IMAP | None listed |
| Daily limit per mailbox | 30 a day by default | Not stated |
| Pre-launch checks | 13 kinds (7 block, 6 warn) | Not stated |
| Bounce brake | Cap x0.75 from 2%, x0.5 from 3%, x0.25 from 5%, paused at 7% | Not stated |
| Unsubscribe handling | Link, one-click headers and suppression lists | Not applicable |
| Volume for 5 mailboxes at the default | 150 emails a day (our arithmetic: 5 x 30) | Not applicable |
| Free plan email sends | 100 campaign sends a month | 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 email is part of your outreach, Dux-Soup does not cover it on these pages
Ask them whether anything has been added since we read the pages.
An address finder is not a sender
Finding an address and sending to it are different jobs.
Warmerly can hold both
Email steps and LinkedIn steps sit in one sequence with the add-on.
What 5 mailboxes can send
At the default of 30 a day, five mailboxes can send 150 a day, and 750 over a five-day week (our arithmetic). With the volume ramp, a young mailbox sends 3 on its first sending day and 15 by the 13th.
Daily volume against domain risk
Warmerly shows a deliverability warning when more than 5 senders share one domain, so five mailboxes on one domain is the largest group that avoids it. Spreading the same 150 sends over two domains keeps each domain's load lower.
A bounce spike on one mailbox
From 2 per cent bounces over seven days that mailbox's cap is multiplied by 0.75, so 30 a day becomes about 22. At 3 per cent it is 15, at 5 per cent about 7, and at 7 per cent it is paused (our arithmetic from the stated multipliers).
Getting email and LinkedIn together
Dux-Soup collects addresses and Warmerly sends to them. Export Dux-Soup's prospect data to CSV with the email column filled, then import it into a campaign.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You send cold email as well as LinkedIn messages
- You want volume controls and a bounce brake on every mailbox
- You want pre-launch checks before a campaign starts
- You want email and warmup in one product
- You want bounce and complaint protection by default
- You want daily limits per mailbox you can see
Dux-Soup
Dux-Soup is the better fit if
- You only send LinkedIn messages
- You want an address lookup beside your LinkedIn leads
- You send email from another tool already
- Email is not part of your plan
- You want to use a separate email tool and keep LinkedIn here
- You only need email addresses captured
Questions
Does Dux-Soup send email?
We found no email sending on its home or pricing pages. It may offer something we did not find, so check with them.
Which mailboxes can Warmerly send from?
Gmail, Outlook, Zoho or any SMTP and IMAP mailbox, with Google and Microsoft sign-in.
Can I send cold email through Dux-Soup?
We found no email step on its pages. It captures addresses and can look them up for credits.
What stops Warmerly sending to people who unsubscribed?
Unsubscribes go on a workspace suppression list and the engine checks it right before every email.
How many emails a day can one mailbox send?
30 by default, adjustable per mailbox. Young mailboxes can ramp from 3.
Sources
- Dux-Soup pricing
- Dux-Soup home
- Help: finding email addresses
- Dux-Soup lead management page
- Dux-Soup team page
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.