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InfraOptimal vs Maildoso

Maildoso is one of the cheapest ways to buy mailboxes at volume. It gets there with a rotating shared IP pool and a 15-email daily cap per mailbox. InfraOptimal gives you your own IP. Here is where each one wins.

Buy InfraOptimal mailboxes See InfraOptimal

$57

30 InfraOptimal mailboxes, monthly, dedicated IP

$75

30 Maildoso mailboxes, monthly, shared pool

10

InfraOptimal minimum, against 30 on Maildoso

$8

InfraOptimal domain per year, against $12 to $15

Line by line	InfraOptimal	Maildoso
Sending IP	Dedicated to your workspace, included	Rotating shared pool
Price	$2.00 monthly, down to $1.00 on annual	30 for $75, 300 for $225, 1,000 for $499
Daily cap per mailbox	Set by you, 30 recommended	15 cold emails
Minimum	10 mailbox slots	30 mailboxes
Billing	Monthly, quarterly or annual. Monthly cancels any time	Monthly or quarterly
Swapping mailboxes	Free: delete and recreate inside your slots	Free inside your licence
Domains	In-app from $8 / yr, or bring your own	$12 / yr, $15 from October 1, 2026
Reputation	Built only by your own sending	Shared, blocked IPs swapped out
DNS setup	SPF, DKIM, DMARC, MX, SSL and tracking, re-checked	Automated
Works with	Any sequencer, via SMTP and IMAP	Exports to Instantly, Smartlead, Saleshandy
Best for	Owning your reputation	Lowest cost per mailbox at 300+

The bill

What you pay at your volume

Monthly billing unless noted. InfraOptimal tiers drop to $1.00 per mailbox on annual billing.

Scenario	InfraOptimal	Maildoso
30 mailboxes	$57	$75
100 mailboxes	$180	$225 on the 300 plan
300 mailboxes	$510	$225
1,000 emails a day	34 mailboxes, $65	67 mailboxes at 15 a day, $225 plan

Maildoso monthly SMTP pricing from its public pricing page, checked September 2026. Mailbox counts for 1,000 emails a day use 30 a day on InfraOptimal and the 15 a day Maildoso cap. Check Maildoso's site for current rates.

The short version

Which one should you buy?

Compare per email, not per mailbox. The 15-a-day cap means about twice the mailboxes and domains for the same volume. Below a few hundred mailboxes InfraOptimal usually costs less for the same sends, from an IP only you use. Above that, Maildoso is cheaper if a shared pool suits you.

Pick InfraOptimal

You want an IP nobody else sends from
You want more than 15 sends a day per mailbox once warm
You are starting with fewer than 30 mailboxes
You want cheaper domains

M

Pick Maildoso

You need 300 or more mailboxes at the lowest price per box
You are fine sending 15 emails a day from each
You want automatic IP swaps when the pool is blocklisted
You want a 30-day money-back guarantee

FAQ

InfraOptimal vs Maildoso, answered

Is Maildoso cheaper than InfraOptimal?

Per mailbox at 300 and up, yes. Per email sent at smaller volumes, usually not, because each Maildoso mailbox is capped at 15 cold emails a day. And Maildoso sends from a shared rotating pool, while InfraOptimal is a dedicated IP.

What is a rotating IP pool?

Your mail goes out through many shared IPs, and blocked ones are swapped for clean ones. It limits the damage from any one IP, but your placement still depends on the pool.

Do I need more domains on Maildoso?

For the same daily volume, roughly twice as many, since you need about twice the mailboxes. At $12 to $15 a domain that adds up. InfraOptimal domains start at $8.

Can I run both?

Yes. Plenty of teams keep a pooled estate for rough lists and a dedicated IP for their best segments. MailOptimal rotates across whatever you connect.

More comparisons

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10 mailbox minimum

A dedicated IP, priced like a shared one

Dedicated IPs included, DNS handled, warmup running, from $1.00 per mailbox a month.

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