Comparison
Jan 19, 2026
CEO and co-founder
Maildoso Pricing Breakdown: True Cost per Inbox at Scale (50-200 Domains)
Maildoso pricing tiers and cost per inbox breakdown
Maildoso uses a per-mailbox pricing model that decreases slightly at higher volumes. Based on current pricing information, plans start at $100/month for 32 mailboxes and 8 domains, scaling up to $733/month for 400 mailboxes and 100 domains.
Here's how the effective cost per inbox breaks down:
Plan Tier | Monthly Price | Mailboxes | Domains Included | Cost Per Inbox |
|---|---|---|---|---|
Small | $100 | 32 | 8 | $3.10 |
Medium | $166 | 68 | 17 | $2.44 |
Large | $733 | 400 | 100 | $1.83 |
Maildoso previously offered a $99/three-month starter option, but current pricing shows monthly billing starting at $100/month for 32 mailboxes. Pricing structures change frequently in this market, so verify current rates before committing.
Billing cycle requirements: Maildoso offers both monthly and quarterly billing. The unusual aspect is that quarterly plans don't offer a discount over monthly rates. However, monthly subscribers must purchase domains separately, which changes the cost calculation.
For agencies managing 50-100 inboxes, you'll likely need the Medium tier at minimum. At $166/month for 68 mailboxes, the platform fee alone represents $2.44 per inbox before adding warmup tools or additional domains.
Hidden infrastructure costs: Domains, warmup, and billing cycles
The headline pricing tells only part of the story. Three cost categories typically get buried in the checkout flow.
Domain costs and limitations
Maildoso includes domains in quarterly plans but requires separate purchase on monthly billing. Standard .com domains cost $12.00/year through Maildoso's dashboard. Industry best practices for cold email recommend 2-3 inboxes per domain to maintain healthy sending patterns, meaning 50 inboxes requires approximately 17-25 domains.
Domain costs add $18-35/month (amortized) to your infrastructure spend depending on your inbox-to-domain ratio. On quarterly plans, domains come included, but domain costs are non-refundable even if you cancel your subscription. You retain full ownership and can continue using them elsewhere.
For Inframail, .com domains cost $16.44/year and .info domains cost $9.44/year.
Warmup tool requirements
Maildoso offers an AI warmup add-on, but it costs extra and has significant limitations. The warmup add-on ranges from $160-$2,000/month depending on volume, and it only works with Gmail and Outlook accounts.
If you skip Maildoso's native warmup, external tools become mandatory. Options include:
Warmbox: Starting at $15/month per inbox
Lemwarm: Starting at $29/month
TrulyInbox: Unlimited inboxes from $22/month
For 50 inboxes, external warmup adds $22-90/month depending on your tool choice and plan structure. Maildoso's native warmup at $160/month often exceeds external alternatives unless you need specific Gmail/Outlook integration.
This warmup cost represents a hidden multiplier that can significantly increase your effective per-inbox spend. Our guide on how to warm up email domains covers the process in detail.
Billing cycle cash flow impact
Quarterly billing locks up working capital for bootstrapped agencies. A $166/month plan becomes $498 upfront. For the 400-mailbox tier, you're committing $2,199 before sending a single campaign. This cash flow hit matters when your margins run 15-20% and client revenue arrives monthly.
Compare this to our month-to-month billing at $129/month with no quarterly commitment. You can calculate your email sending capacity and adjust as client counts fluctuate.
The deliverability tax: Shared IPs vs. dedicated infrastructure
The biggest hidden cost in cold email infrastructure isn't on any pricing page. It's the deliverability risk that comes from shared IP addresses.
How shared IPs work
Maildoso uses shared IPs with IP rotation. The platform rotates your sends across multiple IP addresses shared with other users rather than providing dedicated IPs per account.
The risk with dynamic IP rotation is clear: if other users on the shared system send spam or violate policies, it can negatively impact your deliverability even when you follow best practices.
Think of shared IPs like a carpool lane where other drivers affect your reputation. One bad actor spamming gets the whole IP range flagged, and your client campaigns land in spam through no fault of your own.
Real deliverability problems from user reviews
The shared IP risk isn't theoretical. G2 user reviews of Maildoso document specific problems:
"I had to reach out to support almost every day because there would be issues. I've been sending cold emails for years and never burned a domain. Then with Maildoso every single domain was burned in a single day because of a 'large scale issue' they were facing." - Verified user review of Maildoso
"What I dislike about Maildoso is that even with all the preventative measures we've put in place, our inboxes still seem to get affected pretty quickly." - Verified user review of Maildoso
User reviews document recurring issues including burned domains (often replaced with .xyz or .click instead of .com), deliverability drops with emails landing in spam, and blocklisting problems.
Dedicated IP alternative
We use dedicated IPs to isolate your sending reputation from other users. Our video on Dedicated IP vs Shared IP Pools explains the technical differences in detail.
We give you one dedicated US-based IP on the Unlimited Plan ($129/month) or three dedicated IPs on the Agency Pack ($327/month). Your sending behavior alone determines your reputation. If a shared IP user gets blacklisted, your campaigns continue unaffected.
The deliverability tax shows up when clients churn because campaigns land in spam. Saving $50/month on infrastructure means nothing if you lose a $3,000/month retainer due to shared IP contamination.
Total cost of ownership comparison: Maildoso vs. Google Workspace vs. Inframail
Let's run the actual numbers for 50, 100, and 200 inboxes. This TCO calculation includes platform fees, domain costs, and external warmup tools.
Assumptions:
Domain cost (Inframail): $16.44/year per domain ($1.37/month amortized)
Domain cost (Maildoso): $12.00/year per domain ($1.00/month amortized)
Domain ratio: One domain per 2-3 inboxes (industry best practice)
External warmup: $50/month base estimate for 50 inboxes (mid-range tool), scaling proportionally
Google Workspace: $8.40/user monthly billing rate
We're using mid-range warmup pricing as a conservative estimate since tool costs vary significantly by provider and plan structure.
50 inbox comparison
Cost Component | Google Workspace | Maildoso | Inframail |
|---|---|---|---|
Platform Fee | $420 (50 × $8.40) | $166 (68 tier) | $129 |
Domain Costs | $25 (20 domains) | Included in tier | $27.40 (20 domains) |
Warmup Tools | $50 | $160 (native add-on) | $50 |
Monthly Total | $495 | $326 | $206.40 |
Cost Per Inbox | $9.90 | $6.52 | $4.13 |
100 inbox comparison
Cost Component | Google Workspace | Maildoso | Inframail |
|---|---|---|---|
Platform Fee | $840 (100 × $8.40) | $332 (2× 68 tier est.) | $129 |
Domain Costs | $50 (40 domains) | Included in tiers | $54.80 (40 domains) |
Warmup Tools | $100 | $320 (scaled estimate) | $100 |
Monthly Total | $990 | $652 | $283.80 |
Cost Per Inbox | $9.90 | $6.52 | $2.84 |
200 inbox comparison
Cost Component | Google Workspace | Maildoso | Inframail |
|---|---|---|---|
Platform Fee | $1,680 (200 × $8.40) | $733 (400 tier) | $327 (Agency Pack) |
Domain Costs | $100 (80 domains) | Included in tier | $109.60 (80 domains) |
Warmup Tools | $200 | $640 (scaled estimate) | $200 |
Monthly Total | $1,980 | $1,373 | $636.60 |
Cost Per Inbox | $9.90 | $6.87 | $3.18 |
The math becomes clear at scale. Our flat-rate model means your per-inbox cost drops as you grow, while Maildoso's per-inbox fees keep costs rising. At 200 inboxes, Inframail saves approximately $736.40/month versus Maildoso and $1,343.40/month versus Google Workspace.
"I personally have over 1,000 email accounts with Inframail for one flat price. Adding all those records would have probably taken dozens of hours. Instead all records were added within 10 minutes." - Verified user review of Inframail
For a complete walkthrough of setting up infrastructure at scale, watch our tutorial on How to send 1000+ Cold Emails Per Day.
Verdict: Is Maildoso viable for scaling agencies?
Maildoso works for specific use cases but creates problems as you scale.
When Maildoso makes sense:
You manage fewer than 20 inboxes total
Budget constraints outweigh deliverability concerns
You accept the shared IP reputation risk
You don't mind quarterly billing commitments
When to consider switching:
Your inbox count exceeds 30-50 and per-inbox costs squeeze margins
Client campaigns show deliverability problems despite proper warmup
You need dedicated IPs to protect client reputation
Infrastructure costs exceed 25% of client billings
The margin math: If you manage 50 inboxes and client revenue averages $2,000/month per client, Maildoso's estimated $326/month represents roughly 16% of billings for a single client. Inframail's $206.40/month drops that to about 10%. The difference compounds across your entire portfolio.
"So affordable that it will make your unit economics work, even for lower ticket b2b businesses like ours." - Verified user review of Inframail
"Inframail has been absolute gold in terms of delivering a great customer experience, and allowing me to spin up cold email infrastructure at scale for my clients as easily and fast as possible." - Verified user review of Inframail
For agencies prioritizing margin protection and deliverability control, flat-rate pricing with dedicated IPs offers a clearer path to scale. The Ultimate Cold Email Infrastructure Guide for 2025 covers the decision framework.
Sign up to Inframail and get started today with unlimited inboxes on dedicated IPs for $129/month.
Frequently asked questions about Maildoso costs
What is the cheapest Maildoso plan?
The entry-level monthly option is $100/month for 32 mailboxes and 8 domains. This works out to approximately $3.10 per mailbox. Quarterly plans may offer different configurations, so verify current pricing before committing.
Does Maildoso include email warmup?
Maildoso offers an AI warmup add-on for $160-$2,000/month extra, but it only works with Gmail and Outlook accounts. Most users need external warmup tools like Warmbox ($15/month per inbox) or Lemwarm ($29/month). Learn how to warm up your inboxes for best practices.
Is Maildoso cheaper than Google Workspace?
On platform fees alone, yes. Maildoso costs $1.83-$3.10 per inbox versus Google Workspace's $8.40 per inbox (monthly billing). However, once you add warmup tools and account for shared IP deliverability risks that can cause client churn, the savings narrow significantly at the 50+ inbox scale.
Does Maildoso offer dedicated IPs?
Dedicated IPs are available as an add-on for approximately $99/month according to publicly available pricing information. The base plans use shared IP pools with rotation, which introduces reputation risks from other users' sending behavior.
Does Maildoso offer custom pricing for high volume?
Yes. Users needing more than 400 mailboxes can request custom pricing through their sales team for enterprise-scale deployments.
Key terms glossary
Cost per inbox: Total monthly infrastructure spend divided by active mailbox count. Includes platform fees, domains, and warmup tools.
Dedicated IP: An IP address assigned exclusively to your account. Your sending reputation depends only on your own behavior.
Shared IP pool: Multiple users send from the same IP addresses. One user's spam complaints can affect everyone's deliverability.
TCO (Total Cost of Ownership): The complete cost of running email infrastructure including platform fees, domain registration, warmup tools, and sending platform subscriptions.
DNS propagation: The time required for domain name system changes (SPF, DKIM, DMARC records) to spread across internet servers, typically 24-48 hours for manual configuration.
