Mailboxes built for outbound

Connect high-reputation mailboxes that won’t burn out in the first month and say goodbye to spam issues

Add any links to your emails. 100% Safe

We completely re-engineered how Custom Domain Tracking works.

Now, you can safely include links, videos, and images in your emails without risking spam issues or burning your mailboxes.

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Our Product

We provide infrastructure (email inboxes and domains) with excellent deliverability. Unlike Google Workspace or Outlook inboxes, our inboxes are built for cold emailing, which means they get flagged by spam filters far less often.

Spin up hundreds of mailboxes in just 10 minutes, connect them to Instantly, Smartlead (or any other tool), and get reply rates that are 20–40% higher!

Setup your mailbox in minutes

See it in action

No more spam issues!

If you’re not sending images or links, your deliverability rate can hit 95%!

We’ve got your back with IP rotation — if one of them runs into trouble, we’ll automatically replace it. You won’t notice anything happening, and your deliverability will stay consistently high!

A real example of deliverability is when sending over 20,000 emails per day

Save hundreds of hours

on setting up sending domains and email accounts

Imagine this: to set up 100 mailboxes, you’d need to register 25 domains, buy 100 Google Workspace accounts, and configure SPF, MX, and DKIM records for all of them. That could take hours — or even days.

With Maildoso, you can register 250 domains and set up 1,000 mailboxes in just 10 minutes, and they’ll all be ready to use right away!

Out-of-the-box setup

Get domains and email accounts already set up for cold emails

Domain forwarding

All domains automatically redirect your customers to a main site

Master inbox

Connect your email client to a single email account that would receive and send thousands of emails

Mailboxes for just $1.4!

We offer some of the most competitive terms on the market — starting at just $1.4/mo per mailbox with an annual plan and $1.8./mo with a quarterly plan.

On top of that, you get domains for free! And you don’t just rent them. If you cancel your subscription, the domains are yours to keep!

Let’s compare

setting up 400 mailboxes with Maildoso vs. Google Workspace

Real results from our clients

Get a detailed audit of your campaigns...

Facing issues? We’re here to help!

Our dedicated team of cold email experts is here to help. As part of our service, we're happy to review your campaigns and provide actionable advice – we’ll run deliverability tests, check your copy for spam words, links, and Spintax, add Unsubscribe text, and set up custom domain tracking.

Try Our Premium AI Warmup!

Most warmup networks operate over IMAP connections, and email providers know that and detect them. Our AI agents perform in-browser actions, making their actions more powerful in the eyes of the email providers! We send 100 emails per day per mailbox, helping you to get more positive reactions than spam complaints.