Inbox providers · tied for 9th of 52 · 2026

Maildoso pricing and review

maildoso.ai · Private SMTP infrastructure · founded 2023 · Visit site ↗

Deliverability15/27
Inbox choice6/16
Sending4/15
API & AI7/7
Buying terms10/10
Setup cost18/25

tied for 9th of 52 inbox providers

Why it ranks here

Sells private SMTP inboxes. Deliverability: automatic SPF/DKIM/DMARC, inbox placement tests and replacement of burned inboxes. It has a public API and an official MCP server for automation.

Key features

Automatic SPF/DKIM/DMARC
Inbox placement tests
Replacement of burned inboxes
One-click export to other sequencers
A public API

Best for

Teams that set up inboxes from code or an AI agent.

Pricing

Per inbox: $2.50
At volume: $0.49
Minimum order: 30 inboxes
Cheapest plan: $75/mo
Domain (.com): $15/yr

Monthly billing. Pricing page ↗ · checked Oct 31, 2026

Scorecard

DeliverabilityWhat protects sender reputation without extra tools or subscriptions.	15/27
Inbox choiceWhich types of inboxes and domains you can get in one place.	6/16
Sending and workflowWhether you can run and manage campaigns without another tool.	4/15
API and AI agentsHow easy it is to automate the setup from code or an AI assistant.	7/7
Buying termsHow much you risk before you know it works.	10/10
Cost of a working setupWhat 30 inboxes plus warm-up and a sequencer cost per month — the cheaper, the more points.	18/25
Total	60/100	15 of 20 conditions checked

The evidence

Every condition, what the vendor's own site says, and where.

Deliverability
	Ongoing warm-up included in the priceNot offeredFor any new mailboxes and domains, you must run a warm-up for at least 14 days before launching your first campaign. Keep warm-up active for the entire lifespan of the mailboxes, using the maximum volume possible — you can combine different providers or use the Instantly.ai warm-up pool.	source ↗	0/6
	Pre-warmed inboxesNot offeredYou must run a warm-up for at least 14 days before launching your first campaign.	source ↗	0/2
	Automatic SPF, DKIM and DMARC setupConfirmedset up SPF, DKIM and DMARC programmatically	source ↗	5/5
	Inbox placement or spam testsConfirmedWe run inbox placement tests every 3 days and display up-to-date health scores for each mailbox	source ↗	5/5
	Replacement of burned inboxes or domainsConfirmedSelf-healing mailboxes... Your campaigns are sent from different IPs, and we automatically replace them with new ones if they stop working	source ↗	5/5
	Dedicated IP optionNot found on site		0/4
Inbox choice
	Google Workspace inboxesNot found on site		0/5
	Microsoft 365 / Outlook inboxesNot found on site		0/5
	Private SMTP/IMAP inboxesConfirmedSMTP mailboxes designed specifically for outbound campaigns	source ↗	3/3
	Domain purchase inside the productConfirmedthe price for registering a domain through us is $15 per year. This price is fixed and does not change based on the number of domains.	source ↗	3/3
Sending and workflow
	Built-in campaign sequencerNot offeredExport selected to CSV... we support 9 sequencers natively	source ↗	0/5
	Unified inbox for repliesNot found on site		0/4
	Export to other sending toolsConfirmedwe support 9 sequencers natively	source ↗	4/4
	Multi-client workspaces or white-labelNot found on site		0/2
API and AI agents
	Public APIConfirmedAPI and MCP access	source ↗	4/4
	Official MCP serverConfirmedMaildoso's API and MCP server let you register domains, create mailboxes, and set up SPF, DKIM and DMARC programmatically	source ↗	3/3
Buying terms
	Prices published on the siteConfirmedMailboxes for Just $0.49	source ↗	4/4
	Free plan, free trial or money-back guaranteeConfirmed30-days money-back guarantee	source ↗	4/4
	Monthly billing availableConfirmedMonthly Plans ... $75/mo in total	source ↗	2/2
Cost of a working setup
	Cost of a working setup (30 inboxes)Calculated30 inboxes × $2.50 = $75 + $97 — Instantly Hypergrowth for warm-up and sending (the inbox price includes neither) = $172/month	how ↗	18/25

Alternatives to Maildoso

MailOptimal83/100 · $2/inbox

Outreach2day77/100 · $2.50/inbox

MailDeck76/100 · $0.60/inbox

Icemail73/100 · $2.50/inbox

SkySenders62/100 · $2.95/inbox

Smtpfox61/100 · $1.63/inbox

Where we checked

Only the vendor's own public pages. We do not use third-party reviews or ratings. Something wrong? Send a correction.

Badge for Maildoso

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<a href="https://coldemailindex.com/review/maildoso-ai/"><img src="https://coldemailindex.com/badges/maildoso-ai.svg" alt="Maildoso: 60/100 in the Cold Email Index 2026" width="240" height="64"></a>

Every fact is from the vendor's own site, same rules for everyone · Method · Disclosure