Is Inframail or Maildoso cheaper?

Inframail starts at About $129 per month, or near $85 a month billed annually. Maildoso starts at $75 per month for thirty mailboxes, about $2.50 each (free trial).

Inframail vs Maildoso

An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.

The short answer

Editorial assessment

Inframail compared with Maildoso

Both attack per-mailbox cost, from opposite directions. Maildoso sells private SMTP mailboxes from forty-nine cents with about fifteen cold sends a day each, so scale means buying more units. Inframail removes the unit entirely and caps you on monthly volume instead, on Microsoft-backed accounts with a dedicated IP. If cost per send is the metric, model both against your actual volume, because the answer flips depending on where you sit.

Choose Inframail if

High-volume senders and agencies that want mailbox count to stop being a budget line, are comfortable sending entirely from Microsoft infrastructure, and value a dedicated IP and automatic delisting over the breadth of tooling that per-mailbox vendors offer.

Choose Maildoso if

High-volume outbound teams and agencies that have already chosen a sending platform and want the lowest possible cost per authenticated mailbox, accept lower per-mailbox daily sending in exchange, and value automated placement testing, IP rotation, and an API over the prestige of real Workspace accounts.

Side by side

13 attributes

Attribute	Inframail	Maildoso
Category	Infrastructure	Infrastructure
Starting price	About $129 per month, or near $85 a month billed annually	$75 per month for thirty mailboxes, about $2.50 each (free trial)
Pricing model	Flat monthly subscription for unlimited inboxes and domains, tiered by monthly sending allowance and number of dedicated IPs, with an optional done-for-you setup tier. Domains are billed separately.	Monthly mailbox packages with steeply falling unit cost by volume, plus separate domain registration at a flat annual rate; legacy quarterly bundles that include domains remain listed.
Free plan	No	No
Free trial	No	None, but a thirty-day money-back guarantee applies to new users on monthly SMTP packages
Best for	High-volume senders and agencies that want mailbox count to stop being a budget line, are comfortable sending entirely from Microsoft infrastructure, and value a dedicated IP and automatic delisting over the breadth of tooling that per-mailbox vendors offer.	High-volume outbound teams and agencies that have already chosen a sending platform and want the lowest possible cost per authenticated mailbox, accept lower per-mailbox daily sending in exchange, and value automated placement testing, IP rotation, and an API over the prestige of real Workspace accounts.
Setup time	Domains and inboxes can be provisioned the same day, with DNS written automatically. Real sending volume still waits on warmup and ramping, so plan two to three weeks before an estate is operating at full capacity.	Under ten minutes for configuration: about five minutes to register a mailbox, up to fifteen for a new domain, and up to twenty-four hours for an existing domain. Real volume still waits on warm-up and ramping, so plan days to weeks rather than minutes before scaling.
Learning curve	Low mechanically, high in discipline. Nothing about creating inboxes is hard, and that is the risk: with no per-mailbox cost signal, the only thing preventing an unsustainable ramp is the operator's own judgement about mailboxes per domain and sends per mailbox per day.	Low for the tool, moderate for the operating discipline. The console and API are simple. What takes judgement is holding to about eight mailboxes per domain and fifteen sends a day each even though the platform will permit far more, and acting on the placement tests rather than filing them.
Platforms	Web app, Microsoft-backed mail infrastructure, Dedicated US IP addresses	Web app, Bulk domain and mailbox provisioning console, REST API, MCP server
Compliance	SPF, DKIM, and DMARC configured automatically on every connected domain, CAN-SPAM and GDPR sender obligations remain entirely the customer's, since Inframail supplies infrastructure and never touches campaign content, Dedicated IP allocation means sender reputation is attributable to a single customer rather than a shared pool	SPF, DKIM, and DMARC configured automatically on every provisioned domain, CAN-SPAM and GDPR sender obligations remain entirely yours, since Maildoso supplies infrastructure and never touches campaign content, Published daily sending guidance of about fifteen cold emails per mailbox, which is itself a compliance-relevant control
Founded	2023	2023
Headquarters	New York, United States	California, United States
Ownership	Privately held and unfunded	Privately held, operated by BacklinkSwappers, Inc.

Strengths and limitations

Inframail

Strengths

Flat-rate pricing for unlimited inboxes and domains, which removes the per-mailbox cost curve that dominates the rest of the category.
A dedicated US IP included at the entry price, so sending reputation is not shared with strangers.
Automatic delisting requests when a blacklisting appears, which automates the remediation rather than just the alert.
Real-time IP and domain health monitoring, giving an early read on reputation before campaign metrics move.

Limitations

Microsoft only, with no Google Workspace option, which removes provider-to-provider advantage when prospects sit in Google tenants.
Not a sending platform, so it is always a second bill alongside a sequencer.
Warmup is not included, so an unlimited inbox allowance still requires a separate warmup service and the discipline to ramp.
The real cap is the monthly sending allowance rather than the inbox count, which makes the unlimited framing less absolute than it first appears.

Maildoso

Strengths

The lowest published per-mailbox cost in this category by a wide margin, down to forty-nine cents at a thousand mailboxes.
Operational tooling competitors mostly lack: self-healing mailboxes, IP rotation, per-mailbox reputation measurement, and automated placement tests every three days.
Full API access plus an MCP server, included rather than gated to a top tier, which makes provisioning scriptable and assistant-driven.
A thirty-day money-back guarantee, which is the only real evaluation safety net in a market where nobody offers free trials.

Limitations

Not a sending platform, so it is always a second bill alongside a sequencer.
About fifteen cold emails a day per mailbox is roughly half what real Workspace accounts sustain, so you buy far more mailboxes and the sticker-price advantage narrows at low volume.
These are SMTP mailboxes on the vendor's own infrastructure, not genuine Google Workspace or Microsoft 365 accounts, and some recipient environments treat that difference as meaningful.
The vendor describes a shared IP pool with rotation, so your sending reputation is influenced by other customers' behavior in a way that dedicated provider accounts avoid.

Pricing compared

Inframail

Flat monthly subscription for unlimited inboxes and domains, tiered by monthly sending allowance and number of dedicated IPs, with an optional done-for-you setup tier. Domains are billed separately.

UnlimitedAbout $129
Agency PackAbout $327
Done-for-you setupAbout $499
DomainsAbout $5

Flat-rate pricing wins or loses on a single number: how many mailboxes you actually run. At thirty mailboxes, per-mailbox vendors charge roughly $75 to $135 a month and Inframail charges about $129, so there is no advantage. At a hundred mailboxes, per-mailbox pricing runs $250 to $450 while Inframail is unchanged, and the flat fee starts to look decisive. At three hundred it is not close. The dedicated IP strengthens the case further, since almost nothing else at this price isolates reputation. The counterweights are that everything is Microsoft, warmup is not included, and the sending allowance, not the inbox count, is the ceiling that actually binds.

Maildoso

Monthly mailbox packages with steeply falling unit cost by volume, plus separate domain registration at a flat annual rate; legacy quarterly bundles that include domains remain listed.

Thirty mailboxes$75
Three hundred mailboxes$225
One thousand mailboxes$499
Domain registration$12
Legacy quarterly bundlesFrom $299

Maildoso wins on unit cost and loses on throughput, so model both. At 10,000 emails a month, fifteen sends a day per mailbox implies roughly twenty-two to twenty-five mailboxes, which fits the $75 thirty-mailbox package plus a few domains: cheaper than provider-account infrastructure but not dramatically so, because you are buying nearly twice the mailbox count. At 100,000 a month you need on the order of 220 to 250 mailboxes, which fits comfortably inside the $225 three-hundred package, against roughly $330 to $675 a month for the same volume from Mailforge, Primeforge, or Zapmail. That is the honest shape of it: broadly comparable at low volume, decisively cheaper at high volume, with the open question being whether SMTP mailboxes place as well as real Workspace accounts for your specific recipient base.

Editorial verdict on each

Inframail

Inframail is the flat-rate argument in cold email infrastructure, and it is a good one at scale. Removing the per-mailbox charge and including a dedicated IP at the entry price attacks the two costs that dominate large outbound estates, and automatic delisting is a genuinely useful piece of remediation that most competitors do not attempt. The qualifications are specific and they matter. Everything is Microsoft, so a Google-heavy prospect base needs a second provider. Warmup is not included, and unlimited inboxes make over-scaling easy in a setup where a dedicated IP concentrates the consequences on you. And the real ceiling is the monthly sending allowance rather than the inbox count, so choose the plan from a volume forecast. Under about thirty mailboxes, buy per-mailbox from somebody else. Above a hundred, this is one of the cheapest credible ways to run an estate.

Read the full Inframail profile

Maildoso

Best Value

Maildoso is the volume play in cold email infrastructure, and it is honest about the trade it is making. You get SMTP mailboxes on the vendor's own infrastructure rather than real Workspace accounts, with about fifteen cold sends a day each instead of thirty, and in exchange the unit cost falls to a level nobody else approaches. At a hundred thousand emails a month that difference is hundreds of dollars, and the operational tooling that comes with it, self-healing mailboxes, IP rotation, reputation measurement, three-day placement tests, a full API, and an MCP server, is better than what most competitors ship at four times the price. Two things should govern the decision. It is not a sequencer and never will be, so budget for two products. And the mailboxes are not provider accounts, so if your prospect base sits in enterprise Gmail and Outlook tenants where that provenance affects placement, test carefully during the thirty-day money-back window before committing at scale.

Read the full Maildoso profile

Inframail profile last reviewed 2026-09-01; Maildoso last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.