Maildoso Pricing 2026: Plans, Add-Ons and Real Cost

Maildoso sells SMTP mailboxes in monthly plans. The entry plan is 30 mailboxes for $75 a month: $2.50 per mailbox. The minimum is the 30-mailbox plan. Warmup is not included, there is no sequencer, and each mailbox sends up to 15 cold emails a day. Domains are $12 a year, $15 from October 1, 2026.

Prices below are from maildoso.ai/pricing, checked September 28, 2026.

Maildoso Plans and Prices

Larger plans and custom counts are sold on the pricing page and in the app. In this post we compare Maildoso at its entry-plan rate of $2.50 per mailbox. You buy a license for a mailbox count, so deleting and recreating a mailbox does not cost extra.

There is no annual billing. The toggle offers monthly and "Quarterly (legacy)" plans; the legacy plans include domains.

Maildoso does not discount: "No, we have a no-discount policy. Our prices are the same for all users, and we do not run promotions or sales."

What the Plans Include

• SMTP mailboxes on Maildoso's own servers and IPs, with IP rotation.

• Self-healing mailboxes and CAPTCHA domain protection.

• Inbox placement tests every 3 days and a health score for each mailbox.

• API and MCP access on every plan.

• Free deliverability audits.

• Sync to Instantly, Smartlead and EmailBison, plus CSV export.

Not included: warmup and a sequencer. The pricing page is direct about warmup: "For any new mailboxes and domains, you must run a warm-up for at least 14 days before launching your first campaign." Each mailbox can send "up to 15 cold emails / 80 warm-up emails per day, no slow ramp-up". Its Google Workspace page says it is not offering new Google Workspace mailboxes at the moment, and we found no Microsoft 365 option.

Costs on Top of the Plan

Domains stay registered with Maildoso while you use the service. You can ask for them back, and Maildoso says it will transfer them "at no charge at the end of your subscription."

We found no free trial. The pricing page lists a 30-day money-back guarantee for new users on monthly SMTP packages. The terms narrow it to one case: "A refund may be issued if the client's mailboxes fail to send emails for 3 or more consecutive days due to a fault on Maildoso's side." Domains are not refunded.

What Maildoso Costs at 25, 100 and 400 Mailboxes

Same method as our provider comparison: 25 emails a day per mailbox, monthly list prices, domains left out. Maildoso caps cold sending at 15 a day, so the same volume needs more Maildoso mailboxes. We count how many, price them at $2.50 each (Maildoso's rate on its 30-mailbox plan, $75 a month), and add the cheapest Instantly plan for warmup and sending.

For the same email volume, Outreach2day costs less at every size in this table: $139.50 a month less at 25 mailboxes, $264.50 at 100 and $851.50 at 400. The gap comes from two lines Maildoso doesn't have: warmup and a sequencer, which we include in the $2.50.

If you use a different sequencer or warmup tool, replace the Instantly line with its price.

Maildoso vs Outreach2day

With us, one subscription covers what takes Maildoso plus a sequencer, and each mailbox can send up to 25 cold emails a day instead of 15. Both sell SMTP mailboxes; Maildoso's Google Workspace product is currently unavailable, and we sell neither Google Workspace nor Microsoft 365. The side-by-side is at Outreach2day vs Maildoso, and other options are in Maildoso alternatives. By full-setup cost at 100 mailboxes, Maildoso is ninth of ten in our cold email infrastructure providers list.

Before you buy, read the Maildoso review for the refund terms updated October 1, 2026 and the recipient rules. Maildoso is compared with other vendors in Maildoso vs Zapmail and Maildoso vs Inframail. MailDeck vs Maildoso compares its packs with MailDeck's private SMTP at $0.50 an inbox (MailDeck review).

FAQ

How much does Maildoso cost per mailbox?

$2.50 per mailbox on the 30-mailbox plan ($75 a month), the entry plan. Warmup and a sequencer are not included, so budget for a sequencer on top.

Does Maildoso include warmup?

No. Maildoso asks for at least 14 days of warmup before the first campaign, through outside providers or the Instantly warmup pool, and to keep it running for the life of the mailbox.

How many cold emails can a Maildoso mailbox send?

Up to 15 cold emails and 80 warmup emails a day, per the pricing page.

Does Maildoso offer refunds?

New users on monthly SMTP packages have a 30-day money-back guarantee, which the terms limit to mailboxes failing to send for 3 or more days in a row through Maildoso's fault. Domains are never refunded.

Sources

Checked September 28, 2026:

• Maildoso pricing: plans, domains, warmup, sending cap, discounts, guarantee.

• Maildoso home page: setup, sequencer sync.

• Maildoso API: API and MCP.

• Maildoso terms of service: refund conditions.