Create 50 mailboxes for free and connect them to your active campaigns!
1. Buy 10 domains
Domain cost is $12/year (cheaper than Instantly or Smartlead). They remain yours in any case – after the trial, you can use them as you like.
2. Get 50 mailboxes
The trial is already set up there for 30 days (7 days before your trial ends, you’ll receive an email reminder).
3. Start using them
Register on app.maildoso.com, then create 50 mailboxes and export them as a CSV file — we support all major cold email sending platforms.
4. Join our Slack Community
We’ve gathered over 1,300 outbound professionals in our free Slack community — a place where you can find contractors, ask tech support questions, join upcoming webinars, or submit your copy for a roast.
IP rotation
Your emails are sent from many different IPs, which keeps them from being flagged by spam filters.
Self-healing mailboxes
Did some of your mailboxes burn out? No problem — we’ll automatically pause them from sending for 14 days so they can recover!
Global customer domains tracking
With our mailboxes you can include any links, videos, and images in the first message (we automatically replace them with safe substitutes).
Fully automated setup
Create hundreds of mailboxes in just 5–10 minutes. SPF, DKIM, and DMARC records are configured automatically.
Deliverability Checks
We regularly measure deliverability for all mailboxes — you can review the health score of each mailbox and see an overall account rating right in your dashboard.
Trusted by 4,500+ users
Join leading agencies, SaaS companies, and sales teams that trust Maildoso to keep their outbound stable, scalable, and safe.
You can continue using the mailboxes
Just subscribe at only $1.20/month per mailbox (one of the lowest prices on the market).
All our packages come with a 30-day money-back guarantee
You can return the mailbox fees for any reason — just contact support to request a refund
Add our Premium Warmup
With AI agents, we perform hundreds of thousands of in-browser actions, which greatly improves mailbox reputation and makes it invisible to spam filters
BacklinkSwappers, inc.
1390 Market Street Suite 200 San Francisco, CA 94102