Cold Email Infrastructure

Create hundreds of mailboxes in a few clicks and scale your outbound campaigns with rock-solid deliverability

Over 2,000 happy customers

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

Low prices starting at $1.4!

We offer some of the lowest prices 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 decide to cancel your subscription, the domains are yours to keep!

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.

Know exactly where your emails are landing

Mailbox reputation

Get domains and email accounts already set up for outreach campaigns.

The only platform that shows you where you land

Automatic daily inbox placement tests. Know exactly where your emails are landing — in the inbox or spam.

No more IP blacklisting nightmare

A dedicated IP might work well for traditional email marketing, but it's a disaster for cold email — once it's blacklisted, it's game over.

At Maildoso, we take a different approach with our advanced IP rotation system. We monitor IP deliverability in real-time, and if one gets flagged or loses reputation, we automatically rotate it out.

Your emails are sent from hundreds of IPs, so if one runs into trouble, you'll never even notice.

Manage replies with Master Inbox

Use one email account to operate thousands of them

Use your favorite email client

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

Reply to all emails from a single account

A smart system will automatically identify from what email account should be sent a reply based on conversation history. You just reply we’ll take care of the rest.

No more OOO chaos

Your inbox will never be cluttered with tons of out-of-office replies. They all archived automatically

Join our coaching program!

Become an outbound pro with our coaching program. You'll get access to training materials, campaign audits, and weekly webinars!

Connect your emails easily to a favorite cold email software