What is Maildoso?

Maildoso delivers turnkey cold email infrastructure for outbound teams that need dozens or hundreds of trusted mailboxes without managing traditional workspace tenants. Every bundle pairs fresh domains, authenticated inboxes, IP rotation, and reputation monitoring so campaigns start with clean sending history and avoid the common spam traps that plague self-built systems. Agencies, lead generation shops, and revenue teams can deploy 250 domains and 1,000 inboxes in roughly 10 minutes, then export them directly into sequencers like Instantly or Smartlead.

Unlike resold Google Workspace or Outlook accounts, Maildoso runs on proprietary ESP infrastructure optimized for high-volume outreach. Domains are pre-configured with SPF, DKIM, DMARC, and MX records, while automated forwarding and master inbox routing keep reply workflows centralized. The company reports 4,500+ customers using the platform to double reply rates versus standard mailbox providers.

Core Services

Automated Domain & Mailbox Provisioning

Maildoso bundles mailbox licenses with free domain registration. The platform auto-configures all DNS records, provisions inbox naming, and enables forwarding back to the sender’s main domain. Operators simply select mailbox aliases; the system handles the rest, avoiding manual DNS edits or third-party registrars.

Deliverability Automation & Monitoring

The infrastructure continuously rotates IPs and replaces any address that loses reputation, keeping domains healthy with zero downtime. Automatic daily inbox placement checks reveal whether campaigns hit primary inboxes, promotions, or spam, and Maildoso’s deliverability desk offers audits and remediation guidance when metrics slip.

AI Warmup & Reputation Building

An optional premium AI warmup network performs 100 in-browser emails per mailbox each day, generating human-like opens, clicks, and replies that ISP filters view as organic engagement. Warmup sequences can run standalone or alongside existing routines inside Instantly and Smartlead for compounded protection.

Master Inbox & Ops Tooling

Maildoso’s master inbox feature lets teams handle thousands of sending addresses from a single client. Replies route through a central mailbox that automatically chooses the correct sending identity, archives out-of-office responses, and keeps prospect conversations organized. Agencies also gain access to a 1,300+ member Slack community and Maildoso specialists for ongoing coaching.

Pricing

Quarterly bundles start at $100 for 32 mailboxes (with eight domains) and scale to $733 for 400 mailboxes and 100 domains, equating to $1.80 per mailbox. Annual commitments drop pricing to roughly $1.40 per mailbox, while monthly contracts are newly available at higher per-seat rates. AI warmup packages bill separately—$160/month for 32 mailboxes, $340/month for 68, and $2,000/month for 400. Mailbox licenses carry a 30-day money-back guarantee, though domain charges remain non-refundable and stay in the customer’s control after cancellation.

Ideal Use Cases

Maildoso fits agencies and outbound teams that need fast mailbox scaling, hands-off DNS management, and guardrails against IP blacklisting. It also suits operators who want centralized reply handling rather than juggling hundreds of native inbox logins. Teams focused on consumer outreach or who require bring-your-own-domain flexibility may prefer alternatives that expose traditional workspace tenants.

Implementation Notes

Current limitations include the inability to transfer in existing domains and a strict B2B targeting policy—sending high volumes to personal inboxes can trigger account suspension. Each mailbox is capped at 95 emails per day (80 allocated to warmup and 15 to prospecting), so ultra-high-velocity senders must scale via additional domains rather than per-mailbox throughput. Customers retain domain ownership upon request, and Maildoso’s support team manages transfers if the service is cancelled.

Maildoso vs. Alternatives

Compared to building Google Workspace fleets manually, Maildoso trades tenant ownership for automation, faster provisioning, and proactive deliverability controls. Against competitors like MailReef or LiteMail, it differentiates with free domains, embedded master inbox tooling, and an ESP-run warmup engine rather than IMAP scripts. Teams that prefer owning their infrastructure may opt for Microsoft 365 resellers or Azure-based providers like Hypertide; those prioritizing ease of operations and reputation safeguards often choose Maildoso to accelerate campaign launch.