Maildoso
Budget-focused cold-email mailbox provider offering proprietary SMTP and Google Workspace accounts at competitive per-mailbox rates, with automated provisioning and IP rotation, but no included pre-warming and shared IP infrastructure.
Pricing breakdown
| Platform | Standard | Warmed | Volume |
|---|---|---|---|
| Dedicated SMTP | $2.50 | — | — |
| Google Workspace | $2.50 | — | — |
Pricing notes
Monthly billing, per-mailbox with volume discounts: $2.50/mailbox (30), $0.75/mailbox (300), $0.50/mailbox (1,000).
Replacements
Burned mailboxes auto-disconnected for 14-day recovery; IPs auto-rotated/replaced; domain replacement available but quality varies (users report .xyz/.click instead of .com)
Our take on Maildoso
Maildoso is built for scale and price. It runs its own SMTP pools plus isolated Google Workspace accounts, provisions in minutes, and lands among the cheapest options we track — SMTP from around $2.50 and Workspace near $3.25, with steep volume discounts. With 400k+ managed mailboxes it's also one of the most established names here, which matters when you're committing a large fleet.
The trade-offs are the usual budget-infrastructure ones, plus a couple specific to Maildoso. Warmup isn't included — the “80 emails/day” figure is a sending cap for your own warmup tool, and the add-on is sold separately at a meaningful monthly cost. The SMTP side is shared-IP, so deliverability depends on how clean the pool stays; a 2025 SURBL blacklisting that affected network-wide domains is a reminder that shared pools carry that risk. Domain replacements are offered, but users report inconsistent TLD quality (.xyz/.click) when swaps happen.
What we like
- +Very low effective pricing (SMTP from ~$2.50, GWS ~$3.25)
- +Huge operational scale (400k+ mailboxes, 5k+ customers)
- +Fast SMTP provisioning (~5 min) with automated DNS
- +IP rotation and provisioning built in
Watch out for
- −Warmup is a paid add-on that's easy to miss on the pricing page
- −Shared SMTP IPs — deliverability rides on pool hygiene
- −A 2025 SURBL blacklisting affected network-wide domains
- −Replacement domains sometimes arrive as .xyz/.click, not .com
Best for: Volume senders and agencies chasing the lowest per-mailbox cost who are comfortable running their own warmup on shared infrastructure.