Maildoso (now at maildoso.ai after a recent rebrand from maildoso.com) made its name on fast, automated cold email infrastructure setup. Ten minutes to provision 20 accounts and 5 domains is genuinely impressive speed. But automation without oversight creates a different kind of problem when deliverability tanks at 2 a.m.
Maildoso just published full pricing across three tier types this month, including a new Combo Package that bundles SMTP and Google Workspace mailboxes. If you've been comparing your options or hitting walls with their self-serve workflow, here's how ScaledMail takes a different approach to cold email infrastructure.
Why Teams Look for a Maildoso Alternative
The automation that ships their setup in ten minutes is the same automation that leaves you alone when something breaks. Recurring complaints from Maildoso users:
- Domain quality is inconsistent. Users have reported lost domains being replaced with .xyz or .click TLDs instead of .com. In cold email, the TLD matters. Spam filters and recipients treat .xyz domains differently from .com domains, and a bad replacement domain can torpedo a campaign.
- Domains are an extra line item on monthly plans. Maildoso publicly discloses the domain registration fee at $12/year per domain. Quarterly SMTP plans include domains for free, but monthly SMTP and Combo plans require buying them separately. A 30-mailbox monthly SMTP plan needs roughly 4-6 domains on top of the $75 mailbox cost.
- Warmup is your problem. Maildoso ships mailboxes ready to send, but ramp scheduling, ratio tuning, and ongoing email warmup are left to you to configure with a third-party tool.
- The cheapest per-mailbox rate has a quarterly commitment. $1.8/month per SMTP mailbox sounds great until you read the fine print: that's the 400-mailbox tier billed at $2,199 per quarter, paid upfront.
- Limited human support. Help is via web chat or email to support. There's no dedicated account contact and no Slack channel where someone is watching your inbox reputation alongside you.
The Core Difference: Managed vs Automated
Maildoso is built on automation. ScaledMail is built on expertise. Both have their place, but the difference matters when email deliverability is the thing standing between your campaigns and your pipeline.
Automated infrastructure is fast and cheap. It can't diagnose why your Microsoft inboxes started bouncing this week, or why your Google accounts are landing in spam after a clean run. That diagnosis takes experience from managing hundreds of thousands of inboxes across dozens of industries.
Real Google Workspace and Microsoft 365 Accounts
ScaledMail provisions actual Google Workspace and Microsoft 365 accounts on isolated tenants. Real inboxes from the ESPs your prospects' companies use every day. ESPs treat email from their own platforms differently than email from third-party SMTP servers, and that ESP-to-ESP trust is part of what makes inbox placement consistent.
Maildoso's new Combo Package finally bundles Google Workspace mailboxes alongside SMTP, but provisioning, sequencer connection, and ongoing health checks are all on you. ScaledMail handles every step.
Tenants vs IPs Are Different Things
A tenant is your Microsoft 365 or Google Workspace account environment. Isolated tenants mean your M365 and Google accounts aren't sharing an organizational environment with other customers, so your sender reputation inside those ESPs is entirely yours. ESPs evaluate reputation at the tenant level more than the IP level, which is why isolation matters.
For SMTP, shared IPs are actually an advantage, because they're part of larger pools that get rotated when flagged. Dedicated SMTP IPs are a single point of failure: once one gets identified, you're out the money and rebuilding from zero. Shared SMTP pools rotate around problems. ScaledMail uses shared SMTP pools for exactly this reason.
Domain Quality You Can Trust
ScaledMail offers pre-aged, pre-warmed domains in 30, 90, and 180 day vintages. These are .com domains with established history and ESP trust, no .xyz substitutes, no fresh domains that get flagged in the first week. You can also bring your own domains from any registrar, and the team configures the records for you.
White-Glove Setup and Ongoing Support
Every ScaledMail customer gets DNS configuration done by the team (SPF, DKIM, DMARC), advice on which sequencer-side warmup tool to use and the right ratio to set, ongoing deliverability monitoring, and a dedicated Slack channel for support. The Slack channel routes you straight to the people who manage 217,600+ inboxes every day, so when something looks off you're talking to an operator who's seen it before.
Feature Comparison: ScaledMail vs Maildoso
| Feature | ScaledMail | Maildoso |
|---|---|---|
| Setup approach | White-glove, done by cold email experts | Fully automated (~10 min) |
| M365/Google tenants | Isolated tenants, set up and managed for you | Self-serve provisioning, you configure each one |
| Inbox types | Google Workspace, Microsoft 365, SMTP | SMTP, Google Workspace (Combo Package only) |
| Domain quality | .com domains, pre-aged 30/90/180 day options available | .com domains primary, but users have reported .xyz/.click substitutes for replacements |
| Domains included | Bundled into the package, no per-domain charge | Quarterly SMTP only. Monthly and Combo plans charge $12/year per domain separately |
| DNS configuration | Fully managed (SPF/DKIM/DMARC) | Auto-configured, limited flexibility for connecting to other tools |
| Warmup | Runs in your sequencer (Smartlead, Instantly, EmailBison, etc.). ScaledMail tells you which to pick and what 2:1 ratio to set. | Runs in your sequencer. You decide which tool, ratio, and ramp on your own. |
| Support | Dedicated Slack + web chat + in-app chat, all routed to humans | Email/chat support, no dedicated account contact |
| Billing flexibility | Month-to-month | Monthly available on Combo and SMTP, but lowest per-mailbox rates require quarterly upfront |
| Master inbox | Use your sequencer's unified inbox | Built-in master inbox for replies |
| Sequencer integration | Works with all major sequencers | Works with Instantly, Smartlead, EmailBison, and others |
Pricing Comparison
Maildoso publishes three tier types as of this month:
- Combo Package (new tier, SMTP + Google Workspace bundled): $90/month for 15 GW + 15 SMTP / 6 domains, scaling to $675/month for 150 GW + 150 SMTP / 60 domains. Per-mailbox rate ranges from $2 to $3.
- Monthly SMTP: $75/month for 30 mailboxes ($2.50 each), scaling to $570/month for 300 mailboxes ($1.90 each). Domains purchased separately at $12/year.
- Quarterly SMTP: $299/quarter for 32 mailboxes ($3.10/month each, 8 free domains), scaling to $2,199/quarter for 400 mailboxes ($1.80/month each, 100 free domains).
The $1.80 figure that anchors their marketing is the 400-mailbox quarterly tier. To hit it, you commit $2,199 upfront and provision 400 SMTP mailboxes from day one. For agencies running smaller campaigns, the realistic per-mailbox economics are $2.50 to $3.10 once you factor in the right tier and domain costs.
ScaledMail is month-to-month with volume discounts at $1K/month and $5K/month. Pricing includes domains (or bring your own), inboxes, full DNS setup, ongoing reputation monitoring, and Slack support. No separate charges for DNS or domain registration. Warmup itself runs in your sequencer (Smartlead, Instantly, EmailBison, PlusVibe), so you don't pay ScaledMail for warmup either. You use what your sequencer already includes.
The value difference: Maildoso gives you fast self-serve infrastructure with hands-off support. ScaledMail gives you managed infrastructure with isolated tenants on M365/Google, expert support, pre-aged domain options, and a human Slack channel when something breaks. If your campaigns depend on consistent inbox placement, the per-inbox price difference pays for itself in the calls you don't lose to spam folders.
Who Should Stay with Maildoso
Maildoso is the right choice if:
- You're testing cold email and want cheap infrastructure to experiment with
- You can configure DNS and sequencer integration without help, and you already know how to drive your sequencer's warmup settings
- You're a solo operator who can troubleshoot deliverability dips on your own
- You want a built-in master inbox for centralized reply management
- Speed of provisioning matters more than ongoing inbox health
Who Should Switch to ScaledMail
ScaledMail is built for teams who:
- Have hit deliverability walls and want human experts diagnosing them in real time
- Need pre-aged .com domains that ESPs already trust
- Want hands-on guidance choosing a warmup tool and dialing in the ratio
- Value month-to-month billing without quarterly upfront commitments
- Need a dedicated Slack channel when something goes sideways
- Are scaling past the point where cheap self-serve infrastructure makes sense
Making the Switch
Moving from Maildoso to ScaledMail takes about a week:
- Assessment. The team evaluates current domain health and sending patterns.
- Provisioning. New domains (or pre-aged) and inboxes set up in 2-4 business days.
- DNS configuration. Full SPF/DKIM/DMARC setup by the ScaledMail team.
- Warmup guidance. Warmup itself runs in your sequencer (Smartlead, Instantly, EmailBison, PlusVibe all include it). The ScaledMail team helps you pick the right one for your stack and dial in the 2:1 ratio. Skip the wait entirely with pre-aged domains.
- Sequencer connection. Inboxes connected to your sequencer of choice (Instantly, Smartlead, EmailBison, or others).
- Monitoring. Ongoing deliverability oversight and Slack support.
Related Articles
- Best Cold Email Infrastructure Providers in 2026
- Inframail Alternative: Why ScaledMail Offers Better Infrastructure
- Cold Email Deliverability: The Complete Guide
- Cold Email Infrastructure Setup: The Complete Guide
- DKIM, DMARC, SPF Setup for Cold Email
- Best Email Warmup Tools
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