The Mailforge Insider’s Guide
Everything we know about Mailforge in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Mailforge
The Insider’s Guide
Shared-IP domains and mailboxes built for cold email sending
Every plan, grade, refund rule and rival among cold outreach tools, read from Mailforge’s own pages.
Made by Mailforge · checked Nov 12, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Mailforge’s own pages, its app-store listings and our grades. Every fact in it is on Mailforge’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
1.6
GPA, above 3 of the 47 other cold outreach tools we grade
Mailforge sells the domains and mailboxes that cold email is sent from. Each domain gets DKIM, SPF, DMARC and custom tracking set up automatically, and the mailboxes run on a shared IP pool and can be used with any sending software. It sits alongside Infraforge, which uses dedicated servers, in the same vendor's Forge stack.
To get you started, here are 8 things to know about Mailforge, taken from its own pages and our grades.
DNS is automated, but domains, slots and a sender all have to be put together.
- 1
Best for bulk mailboxes for cold email on shared IPs
It sends nothing itself, and domains are bought separately.
- 2
Paid plans start at $3 a month
As its pricing page puts it: $3 per mailbox slot / month, billed monthly, with a 10-slot minimum.
- 3
It runs on Web
Web.
- 4
Automated DNS setup
Each domain added gets DMARC, SPF, DKIM and custom domain tracking configured, with bulk DNS updates in the app.
- 5
Shared IP pool
Mailboxes are spread across a shared IP pool, in contrast with Infraforge's dedicated servers.
- 6
Pre-warmed domains and mailboxes
The page says domains and mailboxes can be bought pre-warmed so sequences can start right away.
- 7
A 1.6 GPA, above 3 of 47
That is against the other cold outreach tools we grade, on value, the free plan, features, ease of use and platforms.
- 8
Keep it
To replace Mailforge you would be making a network of real inboxes that open and answer your emails. That is not a weekend's work, with an AI app builder or without one.
Mailforge at a glance
- Pricing
- Paid, from $3 per mailbox slot / month, billed monthly, with a 10-slot minimum
- Free plan
- No
- Free trial
- None stated
- Runs on
- Web
- Made by
- Mailforge
- Category
- Cold Outreach
- Our grade
- 1.6 GPA, weak
The report card
Best for bulk mailboxes for cold email on shared IPs
Mailforge sells the domains and mailboxes cold email goes out from, on a shared IP pool with SPF, DKIM, DMARC and tracking set up automatically. It's $3 a slot a month with a 10-slot minimum. It sends nothing itself, and domains are bought separately.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | $3 a slot a month billed monthly, with a 10-slot minimum, so $30 at the floor. Just above the category's cheaper quarter ($25), before domains. |
| Free plan and trial | F | No free plan or trial. You can look around after signing up, but sending means buying domains and mailboxes. |
| Features | D | Domains, mailboxes and DNS only. It needs a separate sender to be useful, and shared IPs share a reputation. |
| Ease of use | C | No store rating on record. DNS is automated, but domains, slots and a sender all have to be put together. |
| Platforms and integrations | B | Web with an API, and Salesforge, Infraforge, Warmforge and Primeforge from the same maker. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Mailforge is for
- Fits if you want cheap mailboxes for a sequencer you already pay for
- Works for small senders happy on shared IPs
Who it is not for
- Skip it if you want a tool that sends campaigns, as it doesn't
- Not for you if you want a trial, since there isn't one
- Watch out: slots are charged whether or not a mailbox is created
- Pricey if you add domains and masking: .com is $14 a year and masking is $2 per domain a month
Good to know
Good for
- Cold email senders who run many domains and mailboxes
- Agencies that keep each client in a separate workspace
- Teams that already have a sending tool and need only the infrastructure
Worth knowing
- Slots are billed whether or not a mailbox is created in them, and the minimum purchase is 10.
- Domains are bought separately; the calculator prices .com at $14 a year, charged once, with no annual discount on domains.
- There is no free trial; the app can be explored after sign-up, but domains and mailboxes must be purchased to send.
- Each Forge product is a separate subscription, and SSL and domain masking costs $2 per domain a month.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$3
A month to start
Mailforge is a paid product, starting at $3 per mailbox slot / month, billed monthly, with a 10-slot minimum.
You can look around after signing up, but sending means buying domains and mailboxes.
Mailbox slots
$3
per mailbox slot / month, billed monthly, 10-slot minimum
Slots are the capacity to create mailboxes and are charged whether used or not. The calculator shows 25 slots at $75 a month, or $60 a month billed yearly.
Read from mailforge.ai on Nov 12, 2026.
Ways to pay less
Annual discount
Two months free on annual mailbox billing
The FAQ says annual billing for mailboxes gets 2 months free automatically; there is no discount on domains.
Stated on mailforge.ai
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Shared-IP domains and mailboxes built for cold email sending. Here is what it does, as its own site describes it, and what it covers: public API, inbox warm-up, dMARC.
It needs a separate sender to be useful, and shared IPs share a reputation.
- Automated DNS setup
- Each domain added gets DMARC, SPF, DKIM and custom domain tracking configured, with bulk DNS updates in the app.
- Shared IP pool
- Mailboxes are spread across a shared IP pool, in contrast with Infraforge's dedicated servers.
- Pre-warmed domains and mailboxes
- The page says domains and mailboxes can be bought pre-warmed so sequences can start right away.
- Workspaces and domain transfers
- Projects can have their own workspaces, and domains can be transferred in or out.
- Works with any sending tool
- Mailboxes connect to any sending software, including Salesforge from the same vendor.
- SSL and domain masking
- An add-on that redirects securely while masking the domain behind a branded website.
Where it runs
- Web
What it works with
- Salesforge
- Infraforge
- Warmforge
- Primeforge
Mailforge is made by Mailforge.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
3/47
Other cold outreach tools it is graded above
Mailforge's GPA of 1.6 is higher than 3 of the 47 other cold outreach tools we grade, and level with 1.
It stands best on platforms and integrations (B, above 9 of 47) and worst on free plan and trial (F, above 0).
Its paid plans start at $3 a month, against a middle price of $39 for the category: 1 of the 43 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 48 cold outreach tools we grade, cut by the letter each got. Mailforge’s own letter is outlined.
- CValue for moneyAbove 9 of 47
- FFree plan and trialAbove 0 of 47
- DFeaturesAbove 0 of 47
- CEase of useAbove 0 of 47
- BPlatforms and integrationsAbove 9 of 47
Price against what you get
Each dot is one of 44 cold outreach tools. Further left costs less; higher up scores better on features, ease of use and platforms. Mailforge is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace Mailforge you would be making a network of real inboxes that open and answer your emails. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 43 of the 47 other cold outreach tools grade higher. It costs $36 a year.
What you could not
- A network of real inboxes that open and answer your emails.
- Reading the reports inbox providers send about your domain.
- It plugs into other products, Salesforge, Infraforge and Warmforge among them, and has an API.
What this rests on. Mailforge’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Infraforge, Maildoso, Inboxkit, Salesforge and Warmbox
The 5 tools Mailforge is most often weighed against, with where each one differs from it.
- 1.6GPA
Infraforge
From $4/mo
- 1.4GPA
Maildoso
From $75/mo
Cold email mailboxes and domains sold by the mailbox.
- Mailforge also covers inbox warm-up.
- 1.8GPA
Inboxkit
From $2.50/mo
Google and Microsoft mailboxes for cold email, priced per mailbox.
- 2.8GPA
Salesforge
Free trial · from $40/mo
Cold email and LinkedIn sequences with AI-written messages.
- Mailforge also covers inbox warm-up and dMARC.
- Salesforge also covers AI agents and email campaigns.
- 1.8GPA
Warmbox
From $15/mo
Email warm-up through a private network of inboxes.
- Mailforge also covers dMARC.
- Warmbox also covers reports.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
14
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Mailforge free?
No. Mailforge is a paid product, starting at $3 per mailbox slot / month, billed monthly, with a 10-slot minimum.
How much does Mailforge cost?
Mailforge lists one plan. Mailbox slots: $3 per mailbox slot / month, billed monthly, 10-slot minimum.
What platforms does Mailforge work on?
Mailforge is available on Web.
Does Mailforge offer any discounts?
Mailforge publicly lists the following: Two months free on annual mailbox billing.
Does Mailforge have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Mailforge is listed for Web.
Does Mailforge have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Mailforge is listed for Web.
Is Mailforge open source?
Mailforge is not described as open source on its own site, as read on Nov 12, 2026.
Does Mailforge have an API?
Yes. Mailforge offers a public API, according to its own site.
What does Mailforge integrate with?
Mailforge's listing names Salesforge, Infraforge, Warmforge and Primeforge.
Who makes Mailforge?
Mailforge is made by a company of the same name.
What are the alternatives to Mailforge?
The closest alternatives to Mailforge in our directory are Infraforge, Maildoso, Inboxkit, Salesforge and Warmbox.
How does Mailforge compare with other cold outreach tools?
Mailforge's GPA of 1.6 is higher than 3 of the 47 other cold outreach tools we grade, and level with 1.
Is Mailforge good value for money?
ToolGPA grades Mailforge C for value for money. Its paid plans start at $3 a month, against a middle price of $39 for the category: 1 of the 43 others that charge start lower.
Could I make my own version of Mailforge?
To replace Mailforge you would be making a network of real inboxes that open and answer your emails.
Where this guide comes from
The prices, plans, platforms and features were read from Mailforge’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from Mailforge's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Mailforge. Prices change, so check mailforge.ai before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Mailforge, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/mailforge
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Mailforge: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/mailforge
Know someone choosing between cold outreach tools?
Send them this guide: toolgpa.com/tools/mailforge/guide
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See our other guides
The best-graded cold outreach tools after Mailforge, each with an Insider's Guide of its own.
- Cold Outreach Insider's GuideEvery one of the 48 cold outreach tools we grade, compared
- lemlist Insider's GuideCold email and LinkedIn sequences with a built-in lead database2.8 GPA
- Salesforge Insider's GuideCold email and LinkedIn sequences with AI-written messages2.8 GPA
- Saleshandy Insider's GuideCold email sequences with a B2B lead database in every plan2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Mailforge’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Mailforge is a trademark of its owner, and this guide is not made, paid for or approved by Mailforge. Prices and plans change: check mailforge.ai before you buy.