Maildoso review (2026): is it worth $75 a month?
Cold email mailboxes and domains sold by the mailbox
Black Friday: is there a Maildoso sale?
Maildoso report card
Weak · out of 4.0 · graded Nov 12, 2026
Best for blocks of cold-email mailboxes
Maildoso supplies mailboxes and domains for outbound email and sets up SPF, DKIM and DMARC. You export them to a sequencer like Instantly or Smartlead. The floor is $75 a month for 30 mailboxes, domains cost extra, and each mailbox sends at most 15 cold emails a day.
Who Maildoso is for
- Fits if you need 30 or more mailboxes for an outbound team
- Works for senders who already run Instantly or Smartlead
Who Maildoso is not for
- Skip it if you need just a few mailboxes, since 30 is the smallest block
- Not for you if you want a trial or a discount, because neither exists
- Watch out: domains cost extra, $15 a year or $11.90 a month pre-warmed
- Tight if you want volume per mailbox: 15 cold emails a day each
Why Maildoso gets a 1.4
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- DValue for money$75 a month for 30 mailboxes is the smallest plan, which is where the category's dearest tenth begins. Domains aren't included. It is cheaper per mailbox as blocks grow.
- FFree plan and trialNo free plan and no trial on record. It also has a no-discount policy.
- DFeaturesMailboxes and DNS only. It is infrastructure and needs a separate sender, and each mailbox is capped at 15 cold emails a day.
- CEase of useNo store rating on record. Mailboxes come set up, but new ones need about 14 days of warm-up and a sender to connect.
- BPlatforms and integrationsWeb, exporting to Instantly, Smartlead, Saleshandy and EmailBizon.
What these grades rest on. Graded from this listing, whose facts were read from Maildoso's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/maildoso#review"><img src="https://toolgpa.com/badge/maildoso.svg" alt="Maildoso: 1.4 GPA on ToolGPA" width="196" height="56"></a>Where Maildoso stands among cold outreach tools
Maildoso's GPA of 1.4 is higher than 0 of the 47 other cold outreach tools we grade, and level with 2.
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 $75 a month, against a middle price of $39 for the category: 39 of the 43 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 30 tools score higher and cost less.
Each grade against the category
Every bar is all 48 cold outreach tools we grade, cut by the letter each got. Maildoso’s own letter is outlined.
- DValue for moneyAbove 0 of 47, level with 8
- FFree plan and trialAbove 0 of 47, level with 10
- DFeaturesAbove 0 of 47, level with 6
- CEase of useAbove 0 of 47, level with 43
- BPlatforms and integrationsAbove 9 of 47, level with 38
Price against what you get
Each dot is one of 44 cold outreach tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Maildoso, or make your own?
You could make this
What Maildoso does at its core is plain work, and that is the kind of thing an AI app builder makes well.
You would give up 2 things, listed below, and little else. It costs $900 a year. An AI app builder starts at about $20 a month on our listings, and you only need it while you build.
What you could make
- It runs in a browser, which is where something home-made would run too.
What you could not
- Reading the reports inbox providers send about your domain.
- It plugs into other products, Instantly, Smartlead and Saleshandy among them, and has an API.
What this rests on. Maildoso’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.
What is Maildoso?
Maildoso supplies mailboxes and domains built for outbound email and sets up SPF, DKIM and DMARC for them. It is infrastructure rather than a sequencer: you export the mailboxes to a tool such as Instantly or Smartlead. Pricing is a monthly fee for a block of mailboxes, with domains bought separately.
Worth knowing
- Each mailbox sends at most 15 cold emails and 80 warm-up emails a day, and new mailboxes still need about 14 days of warm-up unless they sit on pre-warmed domains.
- Domains are not included in monthly plans: registration is $15 a year and a pre-warmed domain is $11.90 a month.
- Quarterly plans with domains included are labeled legacy on the pricing page; the monthly blocks are the current plans.
- Subscriptions are canceled through support chat or email, and the page says it has a no-discount policy with no promotions.
Key features
- Mailboxes built for outbound
- Dedicated mailboxes on the vendor's own servers and IPs, with IP rotation and automatic replacement of IPs that stop working.
- Automatic DNS setup
- SPF, DKIM and DMARC records are configured when you register mailboxes under a domain bought or connected through the dashboard.
- Self-healing and health scores
- Burned-out mailboxes are disconnected from campaigns for 14 days, and inbox placement tests run every 3 days with a health score per mailbox.
- Sequencer export
- Mailboxes can be exported to outreach platforms; Instantly, Smartlead and EmailBizon sync with one click, and the vendor says 9 sequencers are supported.
- API and MCP server
- Register domains, create mailboxes and push them to a sequencer from code or from an AI assistant such as Claude.
- Pre-warmed domains
- Domains warmed in advance, each holding up to 50 mailboxes, so new mailboxes can start sending without the usual 14-day wait.
Maildoso pricing
As of Nov 12, 2026, Maildoso is a paid product, starting at $75 per month for 30 mailboxes.
- Starts at
- $75 per month for 30 mailboxes
- Free plan
- None
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| 30 mailboxes | $75per month for 30 mailboxes ($2.50 each) | Aimed at early-stage teams. Up to 15 cold emails a day per mailbox, plus the features every plan includes. |
| 300 mailboxes | $225per month for 300 mailboxes ($0.75 each) | Aimed at expanding teams. Same features and 15-a-day limit per mailbox as the smaller block. |
| 1,000 mailboxes | $499per month for 1,000 mailboxes ($0.49 each) | Aimed at large-scale campaigns. Same features and per-mailbox limit. |
Read from maildoso.ai on Nov 12, 2026. Prices change, so confirm with Maildoso before you buy.
Works with
- Instantly
- Smartlead
- Saleshandy
- EmailBizon
Maildoso alternatives
- Maildoso vs Mailforge
From $3/mo
- Maildoso vs Infraforge
From $4/mo
- Maildoso vs Inboxkit
From $2.50/mo
- Maildoso vs Instantly
Free trial · from $37.6/mo
- Maildoso vs Smartlead
Free trial · from $32/mo
Common questions
Does Maildoso have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Maildoso is listed for Web.
Does Maildoso have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Maildoso is listed for Web.
Is Maildoso open source?
Maildoso is not described as open source on its own site, as read on Nov 12, 2026.
Does Maildoso have an API?
Yes. Maildoso offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.