Maildoso Pricing 2026: SMTP, Google Workspace & Combo Plans Explained

Maildoso has three pricing tracks. Monthly SMTP runs $75/mo for 30 mailboxes ($2.5 each), $158/mo for 70 ($2.25 each), and $570/mo for 300 ($1.9 each). Quarterly SMTP bundles free domains and drops the per-mailbox rate further: $299/qtr for 32 mailboxes ($3.1/mo each), $499/qtr for 68 ($2.4/mo each), and $2,199/qtr for 400 ($1.8/mo each). Combo plans (SMTP + Google Workspace) start at $90/mo for 15+15 mailboxes ($3 each). There's no setup fee and a 30-day money-back guarantee on monthly SMTP. The catch most people miss: domains are only free on quarterly plans (otherwise $12/year each), the cheap SMTP inboxes run on Maildoso's own infrastructure rather than real Google/Microsoft accounts, and Maildoso runs a strict no-discount policy, so the quarterly commitment is the only lever to lower your rate.

Maildoso's commercial model has four rules that shape the real cost:

• You buy a license for a mailbox count, not specific accounts. Delete and recreate mailboxes freely without paying extra (new ones need warmup). Plans come in fixed buckets — 30/70/300 for monthly SMTP, 32/68/400 for quarterly — with custom counts available on the Packages & Add-ons page.
• Three product lines, three price points. Proprietary SMTP is cheapest (from $1.8/mailbox), official Google Workspace costs more (better for B2C/Gmail targeting), and the combo bundles both.
• Quarterly commitment is the discount. There is no annual plan and a flat no-discount, no-promotions policy. The only way to lower your per-mailbox rate is to commit quarterly or buy in larger volume.
• Mailboxes are bundled with infrastructure. Unlike platform-only sequencers, Maildoso provides the actual sending mailboxes, IPs, and (on quarterly) domains. Auto SPF/DKIM/DMARC, IP rotation, and inbox placement tests every 3 days are included.

A few other notes: there's a 30-day money-back guarantee (monthly SMTP packages only), a 20% affiliate program, and custom pricing for 10,000+ mailboxes.

### Monthly SMTP

### Quarterly SMTP (domains included free)

### Combo (SMTP + Google Workspace)

Numbers above are from the Maildoso pricing page. The "from $1.8/mo" headline refers specifically to the 400-mailbox quarterly SMTP plan.

### SMTP mailboxes (from $1.8/mailbox)

These are Maildoso's own proprietary mailboxes, built specifically for outbound. They include IP rotation (campaigns send from multiple IPs, auto-replaced if one stops working), Global Customer Domain Tracking (GCDT) so you can safely include links and images, self-healing mailboxes (a burned mailbox is paused for 14 days to recover, then returned to rotation), and inbox placement tests every 3 days with live health scores. Recommended sending is conservative: 15 cold emails plus 80 warmup emails per mailbox per day, with no slow ramp-up required. You can run up to 99 mailboxes per domain technically, though Maildoso recommends no more than 8.

The trade-off: SMTP is optimized for B2B. Campaigns targeting personal inboxes (@gmail.com, @yahoo.com) see reduced placement, which is exactly why Maildoso pushes Google Workspace for B2C.

### Google Workspace mailboxes

Official, isolated Google Workspace accounts — one workspace per domain, fully separated so a problem on one domain can't cross-contaminate others. These deliver more stable placement for Gmail/Outlook/Hotmail targets, connect directly to your sequencer, and support profile pictures. The limit is 5 mailboxes per domain, with a slower warmup ramp (15 cold / 25 warmup per day). They cost more than SMTP, which is why they sit in the combo and pricier tiers.

### Combo plans

The combo bundles equal counts of SMTP and Google Workspace mailboxes for teams that want cheap volume (SMTP) plus B2C-safe inboxes (GW) in one subscription. The 6/14/60 domain requirements reflect the GW side's 5-mailboxes-per-domain cap.

The headline rates assume domains are free, which only holds on quarterly plans. On monthly plans you add $12/year per domain. For SMTP at the recommended ~8 mailboxes/domain, a 30-mailbox monthly plan needs ~4 domains ($48/year ≈ $4/month total, about $0.13/mailbox), so the domain overhead is minor for SMTP. For Google Workspace it's heavier: at 5 mailboxes per domain, 15 GW mailboxes need 3 domains, and 150 GW mailboxes need 30 — at $12/year each, that's real money on top of the plan.

A realistic read: a small team running 30 SMTP mailboxes lands at ~$75–80/month all-in on monthly billing. A high-volume sender committing to the 400-mailbox quarterly plan gets the true $1.8/mailbox with domains free — roughly $733/month — which is genuinely among the cheapest per-mailbox infrastructure available, provided proprietary SMTP fits the use case.

Five items that change the real math:

1. 1Domains are only free on quarterly plans. Monthly plans (SMTP and combo) require domains separately at $12/year each, or you bring your own. The GW 5-mailbox-per-domain cap means domain costs scale fast on Google Workspace.
2. 2The cheap SMTP inboxes aren't Google or Microsoft accounts. They're Maildoso's proprietary infrastructure. That's fine for B2B volume, but it's a different deliverability profile than official inboxes, and it underperforms for B2C/Gmail targeting (where you're steered to the pricier Google Workspace product).
3. 3No discounts, ever. A stated no-promotions, no-negotiation policy. The only lever to a lower rate is committing quarterly or buying more volume. There's no annual plan.
4. 4The money-back guarantee is narrow. The 30-day guarantee applies to monthly SMTP packages only — not quarterly plans, not Google Workspace, not combo.
5. 5Domains are registered with Maildoso while you subscribe. They'll transfer them back at no charge at the end of your subscription, but during service they sit on Maildoso's account — worth knowing for portability.

The honest positioning: Maildoso wins on raw per-mailbox price at the top end (SMTP at $1.8 with domains included is hard to beat), and the self-healing mailboxes plus IP rotation are genuinely useful for high-volume B2B. Where it asks for a trade-off is what you're buying — proprietary SMTP rather than official Google/Microsoft accounts, weaker B2C placement unless you pay up for Google Workspace, and monitoring limited to periodic placement tests. InboxKit sits at a similar per-mailbox range ($2.50–$3.50) but delivers official Google Workspace, Microsoft 365, and Azure mailboxes with full admin-panel control, US-IP infrastructure, and always-on InfraGuard monitoring (blacklist checks every 6 hours, DNS watchdog, bounce tracking) rather than a placement test every few days.

Maildoso makes sense for high-volume B2B senders and agencies who want the cheapest possible per-mailbox cost and are comfortable on proprietary SMTP infrastructure. The 400-mailbox quarterly plan at $1.8/mailbox with 100 free domains is one of the lowest effective rates in the category, and the self-healing/IP-rotation features reduce the babysitting that bulk SMTP usually requires. It's also a clean fit for operators who already run their sequencer (Smartlead, Instantly, etc.) and just need cheap, ready-in-15-minutes inboxes to plug in.

Maildoso is harder to justify when:

• You target consumer inboxes. SMTP placement to Gmail/Yahoo is reduced; you'd need the pricier Google Workspace product, which narrows the price advantage.
• You want official Google/Microsoft accounts with admin control. Maildoso's cheap tier is proprietary SMTP, not real workspace accounts. If you need full admin panels, app passwords, and official infrastructure, that's a different product — see InboxKit.
• You want continuous deliverability monitoring. Placement tests every 3 days are useful but reactive. Always-on blacklist/DNS/bounce monitoring (like InboxKit's InfraGuard) catches problems between tests.
• You only need a handful of mailboxes monthly. The cheapest entry is 30 SMTP mailboxes at $75/month; very small senders pay for capacity they won't use.

Maildoso is one of the most aggressively priced cold email infrastructure providers in 2026, and the pricing is transparent if you read past the "$1.8/month" headline. The structure rewards commitment and volume: the quarterly SMTP plans bundle domains and deliver the lowest effective rates, while monthly plans add per-domain fees that nudge the real cost up. The self-healing mailboxes, IP rotation, and link-safe tracking are real value for high-volume B2B outbound.

The decision really comes down to what kind of mailbox you want. Maildoso's cheapest tier is proprietary SMTP — excellent for B2B volume, weaker for consumer inboxes, and monitored with periodic placement tests rather than continuous alerts. If you specifically want official Google Workspace, Microsoft 365, or Azure mailboxes with full admin control, US-IP infrastructure, and always-on InfraGuard monitoring at a comparable per-mailbox price, see how InboxKit compares.