Comparison
Jan 8, 2026
CEO and co-founder
Mailscale vs Maildoso: The 2025 Agency Infrastructure Comparison
At a glance: Mailscale vs Maildoso vs Inframail
Before diving into details, here's the core comparison across the three infrastructure options most agencies evaluate:
Feature | Mailscale | Maildoso | Inframail |
|---|---|---|---|
Pricing model | Tiered buckets + domains | Per-inbox packages + domains | Flat-rate unlimited + domains |
50 inbox cost | $119/month | $166/month (68-mailbox tier) | $129/month + domains |
100 inbox cost | $249/month | ~$332/month | $129/month + domains |
IP type | Shared pool | Shared with rotation | Dedicated (1-3 IPs) |
DNS automation | Automated SPF/DKIM/DMARC | Automated SPF/DKIM/DMARC | Automated SPF/DKIM/DMARC |
Warmup included | No | No | No |
Daily send limit | 40-50 recommended | 40-50 recommended | 40-50 recommended |
Billing flexibility | Monthly or annual |
Note on Scalability: Inframail's $129/mo flat rate remains the same whether you have 50 or 400+ inboxes. You only pay for the additional domains. All other providers charge per inbox, meaning your costs explode as you scale. Quarterly or annual only | Monthly or annual |
Note on Scalability: Inframail's $129/mo flat rate remains the same whether you have 50 or 400+ inboxes. You only pay for the additional domains. All other providers charge per inbox, meaning your costs explode as you scale.
We see three distinct philosophies: Mailscale charges for capacity buckets, Maildoso charges for each inbox you create, and Inframail charges for platform access regardless of inbox count.
Key terms in this comparison:
Cold email infrastructure: The domain, inbox, and server setup required to send outbound emails at scale
Inbox placement rate: Percentage of emails landing in primary inbox vs spam folder
Dedicated IP: A sending IP address used exclusively by your organization
TCO (Total Cost of Ownership): Complete cost including platform fees, domains, warmup tools, and sending software
Pricing models exposed: Tiered caps vs per-inbox fees
Mailscale pricing analysis
Mailscale uses a three-tier structure that creates distinct pricing cliffs. According to Mailscale's pricing documentation, the tiers break down as:
Solopreneur: $79/month ($63/month annual) for up to 15 email accounts
Business: $119/month ($95/month annual) for up to 50 email accounts
Enterprise: $249/month ($199/month annual) for up to 200 email accounts
You hit the tier trap at 51 inboxes. You've outgrown the $119 Business tier but must jump to $249 for Enterprise. That's more than double the cost for one additional inbox. Users needing 100 inboxes pay the same $249 as users needing 200.
Mailscale recommends 5 inboxes per domain, meaning 50 email accounts requires at least 10 domains. The platform includes automated warmup across all tiers and offers a 7-day free trial with a free domain, though credit card entry is required.
Maildoso pricing analysis
Maildoso operates on package-based pricing rather than pure per-inbox billing. According to Woodpecker's Maildoso review, the packages are:
Starter: $100/month for 32 mailboxes + 8 domains (~$3.13/inbox)
Growth: $166/month for 68 mailboxes + 17 domains (~$2.44/inbox)
Scale: $733/month for 400 mailboxes + 100 domains (~$1.83/inbox)
The critical constraint: Maildoso requires quarterly or annual billing. There is no month-to-month option because of the cost and work associated with domain setup. If you want 50 inboxes, you must purchase the 68-mailbox tier at $166/month, billed quarterly ($498 upfront).
The hidden costs of scaling
Here's the consolidated TCO breakdown across four volume points:
Inbox Count | Google Workspace | Mailscale | Maildoso | Inframail |
|---|---|---|---|---|
50 inboxes | $420/mo ($8.40/inbox) | $119/mo ($2.38/inbox) | $166/mo (68-mailbox tier) | $129/mo platform cost ($1.98 per inbox) |
100 inboxes | $840/mo | $249/mo (tier jump) | ~$332/mo (bundling required) | $129/mo platform cost ($0.99 per inbox) |
150 inboxes | $1,260/mo | $249/mo | ~$498/mo | $129/mo platform cost ($0.66 per inbox) |
Billing | Monthly | Monthly or annual |
Note on Scalability: Inframail's $129/mo flat rate remains the same whether you have 50 or 400+ inboxes. You only pay for the additional domains. All other providers charge per inbox, meaning your costs explode as you scale. Quarterly minimum | Monthly or annual |
Note on Scalability: Inframail's $129/mo flat rate remains the same whether you have 50 or 400+ inboxes. You only pay for the additional domains. All other providers charge per inbox, meaning your costs explode as you scale.
Our TCO analysis shows Inframail becomes the cheapest option around the 40-50 inbox mark. At 100+ inboxes, flat-rate infrastructure saves $120-$203 monthly versus tiered models and $165-$331 monthly versus per-inbox packages. For deeper analysis, see our Maildoso alternatives guide.
Deliverability and infrastructure: Shared vs dedicated IPs
The risk of shared IP pools
Both Mailscale and Maildoso rely on shared IP systems. According to GMass's infrastructure analysis, "Mailscale uses a pool of shared IPs and does not offer dedicated IPs, so your reputation will hinge at least somewhat on what the other users on the platform are doing."
Maildoso uses what Salesforge describes as "shared IP addresses. This can be a major issue if someone else on the same IP gets flagged for spam. Your deliverability could take a hit, even if you're following all the best practices."
Shared IP risk plays out in real campaigns. One user reported on G2 that "every single domain was burned in a single day because of a 'large scale issue' they were facing. They replaced all the domains with .click .top .xyz emails, which effect deliverability."
As Supersend's blacklist guide explains, "If another user on your shared IP engages in poor sending practices, the entire IP can be blacklisted, immediately crippling the deliverability for every other user."
The dedicated IP advantage
We use a different model. Dedicated IPs work like private roads. Your sending behavior alone determines your reputation. Nobody else's spam complaints or blacklist triggers affect your campaigns.
Inframail provides dedicated US-based IPs on both plans (1 IP on Unlimited, 3 IPs on Agency Pack). This approach means your sender reputation stays isolated from other users' behavior.
For a walkthrough of dedicated IP infrastructure setup, watch our Ultimate Cold Email Infrastructure Guide.
Workflow and automation: Who saves more time?
DNS automation capabilities
Both platforms automate the technical DNS setup that would otherwise consume 12+ hours for 50 domains. Mailscale's website states "it would take you 12+ hours of technical setup" manually.
Mailscale's workflow: According to Mailforge's review, the platform automates SPF, DKIM, and DMARC record creation for every new email account without manual DNS panel work.
Maildoso's workflow: Gigatoolbox's analysis found domains and mailboxes live within 10-15 minutes without touching DNS manually.
Inframail's workflow: We provision domains with automatic authentication record configuration. Customer testimonials report setting up 10 inboxes in 2 minutes. Watch our SPF, DKIM, and DMARC setup tutorial demonstrating the workflow.
38 5-star reviews on Trustpilot
Integration with sending platforms
All three platforms integrate with major cold email sending tools via SMTP/IMAP credentials. According to Mailscale's documentation, the platform "integrates with virtually every cold email sending tool because every cold outreach tool allows you to add self-hosted email accounts (IMAP/SMTP)." Supported tools include Instantly.ai, Smartlead.ai, Apollo.io, Lemlist, Reply.io, and Mailshake.
Maildoso offers one-click synchronization for Instantly, Smartlead, and EmailBizon. According to the Smartlead FAQ, mailboxes sync automatically "with the click of a button."
For Inframail, you export credentials via CSV download. Watch our step-by-step setup tutorial showing the complete workflow. Our help center covers which email platforms work with Inframail.
Critical sending limit difference:
50 Maildoso inboxes = Maximum 1,500 prospecting emails/day
50 Mailscale inboxes = Recommended 1,000-1,500 emails/day (soft limit)
50 Inframail inboxes = No platform-enforced cap
For agencies running high-volume campaigns, Maildoso's hard cap creates a meaningful constraint.
Support and reliability
Support availability
Neither Mailscale nor Maildoso publishes formal SLA documentation with guaranteed response times.
Mailscale support: The platform advertises "24/7 chat support" but user experiences vary. Trustpilot reviews show mixed feedback. The platform has 77 reviews on Trustpilot and 52 verified reviews on G2 with a 4.8-star rating.
Maildoso support: Research.com notes that "customer assistance is accessible through multiple channels, including email and live chat, typically during standard business hours." Maildoso offers access to a Slack community with 1,300+ members.
Inframail support: We provide support for 16 hours every day.
The verdict: Which platform fits your agency stage?
The right choice depends on where you are today and where you're headed.
Small agencies (under 20 inboxes): Maildoso's $100/month starter tier (32 mailboxes) offers the lowest absolute cost if you can commit to quarterly billing and accept shared IP risk. Mailscale's $79/month Solopreneur tier works for agencies needing 15 or fewer accounts with monthly billing flexibility.
Mid-sized agencies (20-50 inboxes): Mailscale's Business tier ($119/month for 50 inboxes) provides better per-inbox economics than Maildoso's packages at this volume. Monthly billing flexibility helps cash flow management.
Scaling agencies (50+ inboxes): Flat-rate infrastructure wins on TCO and margin protection. At 100 inboxes, Mailscale's Enterprise tier costs $249/month and Maildoso requires approximately $332/month in bundled packages. Inframail's $129/month flat rate (plus domain costs) saves $120-$203 monthly while providing dedicated IPs.
Use this decision framework:
If monthly billing matters: Eliminate Maildoso (quarterly minimum required)
If dedicated IPs matter: Eliminate Mailscale (shared IPs across all tiers) and Maildoso (no dedicated IP option)
If you need 51-100 inboxes: Mailscale forces the $249 Enterprise tier jump, doubling costs for one additional inbox
If you're scaling past 100 inboxes: Flat-rate models protect margins that per-inbox and tiered pricing erode
Calculate your total cost: current infrastructure versus flat-rate model across 50, 100, 200 inbox tiers. Check our pricing page to run your specific numbers, or use our email sending capacity calculator to model margin impact at your target scale.
Frequently asked questions
What are the best alternatives to Mailscale?
Top alternatives include Maildoso ($166/month for 68 inboxes with shared IPs), Mailforge (shared IP pool), and Inframail ($129/month flat-rate with dedicated IPs). Infraforge's comparison provides additional context.
How does Inframail pricing compare to Mailscale?
Inframail charges $129/month flat for unlimited inboxes plus domain costs (approximately $16.44/domain). At 50 inboxes, Inframail costs approximately $163/month total versus Mailscale's $119/month, but at 100+ inboxes Inframail remains $129/month base versus Mailscale's $249/month.
Can I use existing Google Workspace domains with these platforms?
Yes, you can transfer your Google Workspace domains.
What is Maildoso's daily email limit?
Maildoso enforces a hard limit of 60 emails per day per email account (30 for warmup and 30 for prospecting).
Key terms glossary
SPF (Sender Policy Framework): A DNS record that specifies which mail servers can send email on behalf of your domain. Prevents spoofing by allowing recipient servers to verify the sender.
DKIM (DomainKeys Identified Mail): A cryptographic signature added to email headers that verifies the message hasn't been altered in transit and confirms it came from your domain.
DMARC (Domain-based Message Authentication, Reporting, and Conformance): A policy that tells receiving servers what to do when SPF or DKIM checks fail. Works with SPF and DKIM to prevent email spoofing.
Dedicated IP: A sending IP address used exclusively by one organization. Your sender reputation depends only on your sending behavior.
Shared IP: A sending IP address used by multiple organizations. Your sender reputation is affected by all users sharing that IP.
SMTP (Simple Mail Transfer Protocol): The standard protocol for sending emails between servers. SMTP credentials connect your sending platform to your email infrastructure.
IMAP (Internet Message Access Protocol): The protocol for receiving and managing emails. IMAP credentials let your sending platform check inbox responses and track replies.
