Maildoso new

Mailboxes built for outbound

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

4,000 companies have already tried

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

Step 1

Step 2

Set up your email addresses — all technical settings (SPF, DMARC, and DKIM) are configured automatically.

Step 3

Then simply export the ready-to-use inboxes and upload them into your sending platform.

See it in action

Average deliverability of 80–90%, even on Outlook*

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!

*Based on clients' data; assuming the emails don’t include images, links, or HTML blocks.

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

How many closed deals will you get?

Calculate how many deals you could close by using Maildoso mailboxes

Save hundreds of hours

on setting up sending domains and email accounts

If you use Google Workspace, you’d need to register domains, buy Google accounts, and configure SPF, MX, and DKIM records for all of them. That could take hours — or even days.

With Maildoso, you can register hundreds of mailboxes in just 10 minutes!

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 $1.40!

We offer some of the most competitive terms on the market — starting at just $1.40/mo per mailbox with an annual plan and $1.80/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

Maildoso

• $1.80 per mailbox;

• Domains for free;

• Great deliverability across all types of mailboxes;

• 10 minutes for complete set up;

Total: $733

Google Workspace

• $7.20 per mailbox;

• ~$10 per domain;

• Possible delivery issues with Outlook;

• Over 10 hours to register SPF, MX, and DKIM records for each domain and manually set up mailboxes;

Total: $3,880 (and tons of stress)

Real results from our clients

Looks impressive?

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.

...or use our free resources!

Deliverability Guide →

Guide for beginners →

Copywriting Guide →

Knowledge base →

Slack Community →

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.

Fly under the radar!

Instead of sending hundreds of emails from a single domain, send them out from dozens of domains. Maildoso automates domain setup, mailbox creation process, reputation monitoring and helps you get more replies.

Save hundreds of hours on setting up sending domains and email accounts

Forget about SPF, MX, DKIM, and other DNS things. No matter how many sending domains and email accounts you need, get them all set up properly in no time.

Out-of-the-box setup

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

Domain forwarding

All domains automatically redirect your customers to a main site.

Great deliverability

Maildoso rotates IP addresses to reach perfect deliverability

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

Stop guessing what's not working

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 treat your campaigns like they're our own, and that's why our customers love working with us.