ConvertKit ◆
ConvertKit (now Kit) is an email-first platform that automates email marketing, newsletter growth, and digital product sales for creators.
Free·from $33/mo
About Maildoso
What is Maildoso?
Maildoso is a cold email infrastructure platform that provides dedicated outbound mailboxes and domains, designed to maximize email deliverability for sales teams and agencies. It automates technical setup (SPF, DKIM, DMARC), offers one-click integrations with popular outreach tools like Instantly and Smartlead, and includes features like IP rotation and CAPTCHA domain protection.
Problem it solves
Manual email setup is time-consuming and often leads to poor deliverability, hurting cold outreach campaigns. Maildoso eliminates technical headaches by automating domain configuration and providing reputable mailboxes that improve inbox placement. It also protects your primary domain from being flagged by keeping it separate and secured.
Who it is for
Maildoso is ideal for B2B sales teams, agencies, and growth marketers who send cold emails at scale and need reliable, cost-effective infrastructure. It’s especially useful for those managing multiple domains and mailboxes, but not suitable for individuals or small teams needing just a few email accounts without outreach focus.
Use cases
Typical use cases include running cold email campaigns for lead generation, scaling outbound sales efforts, and managing multiple client campaigns from an agency. Maildoso also offers an API for developers to programmatically manage domains, mailboxes, and integrations, enabling custom workflows.
Key features
- Automated SPF, DKIM, DMARC setup — Save time and ensure proper email authentication.
- One-click integrations — Connect with Instantly, Smartlead, Saleshandy, and EmailBizon without manual importing.
- Self-healing mailboxes — Automatically fix issues to maintain deliverability.
- IP rotation — Distribute sending across multiple IPs to avoid blacklisting.
- CAPTCHA domain protection — Keep your primary domain safe from being linked to outreach domains.
- API and MCP access — Build custom infrastructure with code or AI assistants.
- 30-day money-back guarantee — Try risk-free with a full refund if not satisfied.
SaaSpartout Score
7.8
/10
Editorial score from our review methodology — not user ratings.
Maildoso Pricing
Maildoso pricing: from $0.49/mailbox.
30 Mailboxes
$2.5 per mailbox, total $75/month. Includes self-healing mailboxes, IP rotation, CAPTCHA protection, mailbox reputation measurements, API/MCP access, 30-day money-back guarantee, free deliverability audits, up to 15 emails per day per mailbox.
300 Mailboxes
$0.75 per mailbox, total $225/month. Same features as above, designed for expanding teams.
1,000 Mailboxes
$0.49 per mailbox, total $499/month. Same features as above, built for large-scale campaigns.
Quarterly plans are also available (e.g., 32 mailboxes + 8 domains for $299/quarter, 68 mailboxes + 17 domains for $499/quarter, 400 mailboxes + 100 domains for $2,199/quarter). For custom mailbox counts, you can purchase add-ons at starting $0.49 per mailbox. A 30-day money-back guarantee applies to all plans.
Frequently asked questions
What is Maildoso?
Maildoso is a platform that provides outbound mailboxes and domains for cold email campaigns, with automated technical setup and high deliverability (95%+).
How much does Maildoso cost?
Maildoso pricing starts at $0.49 per mailbox per month. Plans: 30 mailboxes for $75/month, 300 mailboxes for $225/month, and 1,000 mailboxes for $499/month. Quarterly plans are also available.
Does Maildoso offer a free trial?
Maildoso does not mention a free trial, but they offer a 30-day money-back guarantee on all plans.
Who is Maildoso best for?
Maildoso is best for B2B sales teams, agencies, and marketers who run cold email campaigns at scale and need reliable infrastructure with high deliverability.
What are the top alternatives to Maildoso?
Alternatives include Google Workspace (for standard email) and Azure Tenants, but Maildoso claims lower cost and better deliverability for cold outreach. Other tools like Instantly and Smartlead focus on sequencing but can complement Maildoso.
What is the key limitation of Maildoso?
Maildoso is designed strictly for cold outreach, not for general email use. Each mailbox has a sending limit of 15 emails per day, which may be limiting for high-volume personal communication but is standard for cold email.
