Warmerly
Hosted mailboxes, set up and warming for you, $0.99 to $2.99 a month by plan
Warmerly
Smartlead
One-to-one · Ready-made mailboxes
Ready-made mailboxes
One row, in depth: what each tool does, the verified numbers, and who each suits.
Smartlead details read from its pricing page, home page and help centre on 17 and 19 October 2026.
Warmerly
Hosted mailboxes, set up and warming for you, $0.99 to $2.99 a month by plan
Smartlead
SmartSenders: domains, DNS and mailboxes set up for you
The short answer
Ready-made mailboxes, in one look.
Both sell mailboxes you do not have to set up yourself, with different models. Warmerly hosts them itself (OneMail) at $2.99, $1.99 or $0.99 a month by plan, sets up DNS and starts warmup, and sometimes has ready-warmed ones in stock. Smartlead's SmartSenders buys domains and Google, Outlook or SMTP mailboxes from named vendors, from $3.99 to $5 a mailbox a month plus a yearly domain fee, with a pre-warmed option at $9 a mailbox and $18 a domain. Smartlead has the wider choice of mailbox types and a pre-warmed option it delivers in 1 to 2 hours. Warmerly's per-mailbox price is lower and needs no domain fee on a domain you own, but its ready-warmed stock is not always available. Last checked 19 October 2026.
SmartleadSmartlead ahead on this row
SmartSenders: domains, DNS and mailboxes set up for you
The picture
Drawn side by side.
Days until a mailbox is warmed
Order day is day 0. Times as each company states them
WarmerlySmartlead
| Route | Before it can send campaigns |
|---|---|
| Warmerly, new OneMail mailbox | Warmup starts the same day; first two weeks are the warming period; volume keeps rising to about day 30 |
| Warmerly, ready-warmed (in stock only) | Same day; 21 or more warmup days already done |
| Smartlead, fresh mailbox | 24 to 48 hours to provision, then 14 days of warmup, so about day 16 |
| Smartlead, pre-warmed | 1 to 2 hours after payment, no warmup period |
What a year of mailboxes costs
Pick a number of mailboxes, a Warmerly plan and a Smartlead route
WarmerlySmartlead
20 mailboxes: Warmerly Growth is $39.80 a month, $477.60 for 12 months, with no fee on a domain you own. Smartlead Fresh Google or Outlook via Zapmail is $90.00 a month plus 4 domains at $13.00 a year, $1,132.00 for 12 months.
| Mailboxes | Warmerly Starter, $2.99 | Warmerly Growth, $1.99 | Warmerly Agency, $0.99 | Smartlead fresh Google, $4.50 plus $13 a domain | Smartlead pre-warmed, $9 plus $18 a domain |
|---|---|---|---|---|---|
| 10 | $358.80 | $238.80 | $118.80 | $566.00 | $1,152.00 |
| 20 | $717.60 | $477.60 | $237.60 | $1,132.00 | $2,286.00 |
| 50 | $1,794.00 | $1,194.00 | $594.00 | $2,830.00 | $5,706.00 |
| 100 | $3,588.00 | $2,388.00 | $1,188.00 | $5,660.00 | $11,412.00 |
When a Warmerly mailbox is ready to sell
Two rules a stock mailbox must pass before anyone can buy it
WarmerlySmartlead
Warmerly stock
Not for sale yet: 12 of 21 warmup days.
Smartlead pre-warmed
Ordered any time, delivered 1 to 2 hours after payment, up to 3 mailboxes a domain.
Warmerly's shelf is topped up hourly to a target of 10 mailboxes on each stock domain, at most three created per domain per run, and a new stock mailbox is sellable about three weeks after it is created. So ready-warmed mailboxes are in the wizard only when some are in stock. A buyer can claim 1 to 5 at a time and pays the ordinary OneMail rate.
How Warmerly does it
Warmerly, in detail.
OneMail mailboxes are hosted on Warmerly's own servers, with DNS set up and warmup started for you. Ready-warmed ones appear only when in stock and can send campaigns the same day.
01
What OneMail is
Warmerly hosts the mailbox on its own mail servers, sets up the domain's DNS, starts warmup and connects it to campaigns and the inbox. It is not Google Workspace or Microsoft 365, and no IMAP or SMTP login is provided for these mailboxes today. You can buy a new domain in the wizard, connect one you own, or add mailboxes to a domain you already have in OneMail.
Warmerly product, checked 19 October 2026
02
Price per mailbox
Hosted mailboxes are bought per unit on top of the plan: $2.99 a month on Starter, $1.99 on Growth and $0.99 on Agency, with no billing minimum on any tier. They do not use a plan mailbox slot. A Free workspace can buy one at the Starter rate through a OneMail-only subscription.
Warmerly product, checked 19 October 2026
03
Domains
A new domain is priced live from the registrar before anything is charged. Connecting a domain you already own has no domain fee: by default you change its nameservers to the two the wizard shows, or you can add the records yourself. Adding mailboxes to a domain you already have in OneMail needs no DNS work and warmup starts the same day.
Warmerly product, checked 19 October 2026
04
Warmup after ordering
A new mailbox starts campaigns on a volume ramp, from a few emails a day, and its first two weeks are its warming period. Warmup volume keeps rising until about day 30, longer on a brand new domain. A new mailbox's daily limit defaults to 30 campaign emails a day, with the ramp keeping the first days below that.
Warmerly product, checked 19 October 2026
05
Ready-warmed stock
Sometimes there are mailboxes that have finished warmup. The option shows in the wizard only when some are in stock. A mailbox must have 21 or more warmup days and a health score of 80 or above (or none yet) to be sold, and it is billed at the ordinary OneMail rate with no premium. A buyer can claim 1 to 5 at a time and can send campaigns the same day.
Warmerly product, checked 19 October 2026
06
How the shelf is filled
An hourly job tops each stock domain up to a target of 10 mailboxes on the shelf, creating at most three per domain per run. A new stock mailbox is sellable about three weeks after it is created, so the shelf lags demand. Stock domains are set up by hand by an owner, never automatically.
Warmerly product, checked 19 October 2026
07
Not in client workspaces
OneMail cannot be ordered inside an Agency client workspace. It must be ordered on the Agency workspace.
Warmerly product, checked 19 October 2026
08
Free sandbox mailbox
Every signup gets a free sandbox mailbox already warming, separate from the one mailbox the Free plan lets you connect.
Warmerly product, checked 19 October 2026
09
Connecting your own
Gmail, Outlook, Zoho or any SMTP and IMAP mailbox can be connected instead, including ones you buy elsewhere. A connected mailbox counts against the plan limit: 1 on Free, 5 on Starter, 25 on Growth, 100 on Agency.
Warmerly product, checked 19 October 2026
How Smartlead does it
Smartlead, in detail.
SmartSenders buys domains and fresh or pre-warmed mailboxes from named vendors, billed per domain a year and per mailbox a month, on top of the plan. Fresh mailboxes take 24 to 48 hours and need warmup; pre-warmed ones arrive in 1 to 2 hours.
01
Fresh mailbox prices
The pricing page lists SmartSenders fresh mailboxes by provider and vendor. Google and Outlook via Zapmail are $13 a domain a year and $4.50 a mailbox a month. Outlook via InfraInbox is $16 and $5. SMTP via Mailreef is $19 and $3.99, and SMTP via AeroSend is $13 and $4.20. The page text says it was accurate as of 28 July 2026.
smartlead.ai/pricing.md · read 19 October 2026
02
Pre-warmed mailboxes
Pre-warmed Google and Outlook via Zapmail are $18 a domain a year and $9 a mailbox a month. The help article says each domain supports up to 3 mailboxes, extra mailboxes cannot be added to the domain afterwards, a forwarding domain is required at checkout, and delivery takes 1 to 2 hours after payment. It describes them as ready on day 1 with no warm-up period.
helpcenter.smartlead.ai/en/articles/429-pre-warmed-mailboxes-by-smartlead · read 19 October 2026
03
Fresh mailboxes: delivery and warmup
The walkthrough and FAQ say fresh mailboxes typically take 24 to 48 hours to provision and need warmup before outreach. The vendor articles give 14 days of warmup for Outlook via InfraInbox and 2 weeks for Google via Zapmail, with after-warmup sending of 10 to 15 an inbox a day rising to 20 for InfraInbox. Smartlead's own articles disagree on several of these figures.
helpcenter.smartlead.ai/en/articles/255-smartsenders-step-by-step-walkthrough · read 19 October 2026
04
How buying works
In the app you go to Sender Accounts, Email Accounts, then Purchase, choose Fresh Mailboxes, pick a count (10, 20, 50, 100 or custom, minimum 1) and a provider (Google, Outlook or SMTP), and enter a base name. SmartSenders generates domain variations, and you add a first name, last name and profile photo per persona before paying. Orders are tracked under SmartSender Orders.
helpcenter.smartlead.ai/en/articles/444-how-to-purchase-fresh-mailboxes-in-smartsenders-new-ui-version · read 19 October 2026
05
Billing rules
Mailboxes are billed monthly and expire at the end of month 12. Domains are a one-time yearly payment with a fixed one-year term and no renewal. The articles say there is no cancellation or pause feature, deleting a mailbox mid-month is billed for that month with no proration, and domain fees are non-refundable. Deleted domains and mailboxes cannot be restored.
helpcenter.smartlead.ai/en/articles/444-how-to-purchase-fresh-mailboxes-in-smartsenders-new-ui-version · read 19 October 2026
06
Mailboxes stay inside Smartlead
The help articles say domains and mailboxes bought through SmartSenders cannot be transferred and used outside Smartlead, and you cannot switch vendor for an active domain. Domain registration runs through the Namecheap API and DNS is managed in Cloudflare, with SPF, DKIM and DMARC set up automatically.
helpcenter.smartlead.ai/en/articles/255-smartsenders-step-by-step-walkthrough · read 19 October 2026
07
Vendor limits differ
The InfraInbox article gives a minimum of 2 domains and 3 to 5 mailboxes a domain, says individual mailboxes cannot be deleted, and quotes $16 a domain and $5 a mailbox. The Zapmail article gives 1 to 5 mailboxes a domain, includes admin access, and quotes $4 a mailbox and $15 a domain, which differs from the pricing page.
helpcenter.smartlead.ai/en/articles/258-microsoft-outlook-mailboxes-by-infrainbox-setup-pricing-and-deliverability-guide · read 19 October 2026
08
What the home page claims
The home page offers 'Done For You Mailboxes' and says it handles domains, DNS, SPF, DKIM and DMARC automatically, with clean US IPs, Google and Outlook spread, and discounted pricing per account. It gives no price or delivery time there.
smartlead.ai · read 19 October 2026
What Smartlead does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- Whether SmartSenders needs a particular plan: neither the pricing page nor the help articles name one.
- The refund rule for mailboxes: the articles say domain fees are non-refundable but do not cover mailbox refunds.
- How long a pre-warmed mailbox was warmed for before sale, or the health thresholds used to approve it.
- Whether the vendors (Zapmail, InfraInbox, Mailreef, AeroSend) can be chosen on every order, or only the one marked 'recommended this week'.
- Whether pre-warmed mailboxes are available in orders larger than the fixed bundles of 3 per domain.
The numbers
Only what we could verify.
| Measure | Warmerly | Smartlead |
|---|---|---|
| Ready-made mailboxes | Hosted mailboxes, set up and warming for you, $0.99 to $2.99 a month by plan | SmartSenders: domains, DNS and mailboxes set up for you |
| Cheapest mailbox per month | $0.99 on Agency, $1.99 on Growth, $2.99 on Starter | $3.99 (SMTP via Mailreef); $4.50 for Google or Outlook via Zapmail |
| Fresh Google mailbox | Not offered; OneMail is hosted by Warmerly | $4.50 a month plus $13 a domain a year |
| Pre-warmed mailbox | Same OneMail rate, when in stock | $9 a month plus $18 a domain a year |
| Domain fee | None on a domain you own; a new domain is priced live by the registrar | $13 to $19 a domain a year |
| Mailbox types | Warmerly-hosted only, no external login today | Google, Outlook and SMTP |
| Delivery of a ready mailbox | Same day, when in stock | 1 to 2 hours after payment (pre-warmed) |
| Delivery of a fresh mailbox | Warmup starts the same day on a domain you already have | 24 to 48 hours |
| Warmup before sale | 21 or more warmup days and a health score of 80 or above | Not stated |
| Warmup after ordering a fresh mailbox | First two weeks warming, volume rising until about day 30 | 14 days for InfraInbox and 2 weeks for Zapmail; Mailreef 14 days or more |
| Mailboxes per domain | No limit stated in the docs we read | Up to 3 pre-warmed; 3 to 5 on InfraInbox; up to 5 on Zapmail |
| Starting daily limit | 30 campaign emails a day by default, with a lower ramp at first | Vendor limits, such as 10 to 15 a day rising to 20 on InfraInbox |
| Term and cancelling | No fixed term found in the docs we read | Mailboxes expire at month 12; no cancellation or pause feature |
| Take the mailbox elsewhere | Hosted by Warmerly; no external login today | Cannot be transferred out of Smartlead |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Different products under one name
Our reading: Smartlead resells Google and Outlook mailboxes from third-party vendors, so they look like normal Workspace or Microsoft mailboxes. Warmerly hosts its own, which are cheaper per mailbox but sit on Warmerly's servers and have no outside IMAP login today.
Smartlead is ahead on choice and speed
Our reading: if you want real Google or Outlook mailboxes bought in bulk, Smartlead's ordering flow, with counts up to 100 and custom, is built for that, and its pre-warmed mailboxes arrive in 1 to 2 hours whenever you order. Warmerly does not sell Google or Outlook mailboxes, and its ready-warmed ones depend on stock.
Warmerly is ahead on running cost
Our reading: at $0.99 to $2.99 a month a mailbox with no fee on a domain you own, Warmerly's hosted mailboxes cost less to hold than $4.50 to $9 a month plus $13 to $19 a domain a year. The two are not like for like, because the plan fee, volume limits and mailbox type differ.
Time to first campaign is the other cost
Our reading: with Smartlead's fresh route you wait 24 to 48 hours and then about two weeks of warmup, so roughly 16 days. With Warmerly's ordinary route warmup starts the same day and its first two weeks are the warming period. A ready-warmed mailbox on either side skips this, so the real question is whether stock is there when you order.
Check the lock-in
Our reading: Smartlead says SmartSenders mailboxes cannot leave Smartlead, expire at month 12 and have no pause. Warmerly's hosted mailboxes also have no outside login, so in both cases the mailbox lives with the product. If you want mailboxes you can move, connect ones you buy elsewhere.
Ask about the gaps
Our reading: Smartlead's own articles disagree on prices and warmup volumes, so confirm the live checkout before you budget. For Warmerly, check whether ready-warmed stock is in the wizard before you plan around it.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want a low monthly cost per mailbox and DNS handled for you.
- You own a domain already and do not want a yearly domain fee.
- You are fine with mailboxes hosted by Warmerly rather than Google or Microsoft.
- You are happy to warm a new mailbox if no ready-warmed one is in stock.
Smartlead
Smartlead is the better fit if
- You need Google or Outlook mailboxes bought in bulk, up to 100 or more in one order.
- You want a pre-warmed option you can order any time, delivered within hours.
- You want to pick between vendors and mailbox types, including SMTP.
- You want admin access to Google mailboxes where the vendor includes it.
Questions
How much are Warmerly's ready-made mailboxes?
$0.99 on Agency, $1.99 on Growth and $2.99 on Starter, with no domain fee on a domain you own.
How much are Smartlead SmartSenders mailboxes?
From $3.99 for SMTP via Mailreef and $4.50 for Google or Outlook, plus $13 to $19 a domain a year. A pre-warmed mailbox is $9 plus $18 a domain a year.
How fast is delivery?
Smartlead delivers pre-warmed mailboxes 1 to 2 hours after payment and fresh ones in 24 to 48 hours. Warmerly's ready-warmed ones are same day, when in stock.
Which mailbox types can I get?
Smartlead sells Google, Outlook and SMTP. Warmerly's are hosted by Warmerly only, with no external login today.
Sources
- Smartlead: pricing text version (read 2026-10-19)
- Smartlead: pricing (read 2026-10-19)
- Smartlead: pre-warmed mailboxes help (read 2026-10-19)
- Smartlead: buying fresh mailboxes help (read 2026-10-19)
- Smartlead: SmartSenders step-by-step walkthrough (read 2026-10-19)
- Smartlead: SmartSenders FAQs and troubleshooting (read 2026-10-19)
- Smartlead: Zapmail mailboxes help (read 2026-10-19)
- Smartlead: InfraInbox Outlook mailboxes help (read 2026-10-19)
- Smartlead: home page (read 2026-10-19)
Smartlead pages were read on 19 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
- All features
- Starting price (per month)
- Mailboxes on the starting plan
- Most mailboxes on a published price
- Emails per month on the starting plan
- Highest published send volume
- Contacts on the starting plan
- Warmup
- Spam-folder rescue
- SPF, DKIM and DMARC monitoring
- Inbox placement testing
- Built-in campaign sender
- Shared reply inbox
- LinkedIn steps in the same sequence
- Agency and white-label
- Integrations
- API
- Free plan or trial
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.