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Mailboxes

built for outbound

Connect high-reputation mailboxes that won’t burn out in months and say goodbye to spam issues!

4460+

clients including Deel, Tiktok, Apollo, Zoominfo

10m+

emails sent daily from 200k+ active mailboxes

90%

deliverability rate thanks to IP rotation

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Deliverability is a key!

Launch outbound with us

No matter how great your emails are or how well you target your audience – if they end up in the spam folder, cold outreach just won’t work.

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

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How it works

We provide mailboxes for your cold outreach that stay invisible to spam filters.
Spin up hundreds of mailboxes in just 10 minutes, connect them to Instantly/Smartlead and get reply rates that are 20–40% higher!

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Simple 4 steps process

Mailboxes will be ready in 10 minutes

export them to use in Smartlead, Instantly, or any other outreach tool.

john@website.com
mary@onepage.com
js@example.com

Set up a redirect to your main website

and a master inbox where all emails will be delivered.

website.com / onepage.com example.com → yoursite.com

Type names to generate mailboxes

SPF, DMARC and DKIM are configured automatically

john@
mary@
js@

Register dozens of domains

directly through our interface — we provide them for free!

3

4

2

1

website.com
onepage.com
example.com

IP rotation for high deliverability

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.

IP rotation for high deliverability

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.

Fly under the radar!

Master inbox

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

Inbox placement tests

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

Domain forwarding

All domains automatically redirect your customers to a main site.

AI Warmup

Our AI agents perform in-browser actions, making their actions more powerful in the eyes of the email providers!

Simple integration with

Add any links to your first email. 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.

Learn more

Mailboxes for just $1.8!

We offer some of the most competitive terms on the market — starting at just $1.8/mo.
On top of that, you get domains for free 🎁

Let’s compare purchasing 400 mailboxes in Maildoso and Google Workspace.

Maildoso

Total: $733

• $1.80 per mailbox;
• Domains for free;
• Great deliverability across all types of mailboxes;
• 10 minutes for complete set up;

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Google Workspace

Total: $3,880
and tons of stress

• $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;