Ten mailbox slots. There is no per-seat licence and no setup fee, and you can add slots at any time. Moving up a volume tier lowers the rate on every mailbox you run.

Can I use InfraOptimal mailboxes with other sending tools?

Yes. Every mailbox comes with standard SMTP and IMAP credentials, so it works with Instantly, Smartlead or anything else that accepts a mailbox. Inside MailOptimal you also get warmup, sender rotation and the unified inbox with no extra setup.

InfraOptimal · new

The mailbox bill, rewritten

Q: What is InfraOptimal?

InfraOptimal is our own email sending platform, built for cold outreach instead of office email. Every mailbox sends from an IP reserved for your workspace, DNS is written for you, and warmup starts on day one. Prices start at $1.00 per mailbox a month on annual billing.

Q: Is the IP really dedicated?

Yes. InfraOptimal only sells dedicated IPs. Your pool of mailboxes sends from IPs no other customer touches, so the reputation you build belongs to you and nobody else's sending can damage it.

Q: How does this compare to Google Workspace or Microsoft 365 mailboxes?

Google and Microsoft mailboxes cost $4 per mailbox a month with MailOptimal and send from shared provider IPs. InfraOptimal starts at $1.00 and gives you a dedicated IP, so at 100 mailboxes you pay about $100 a month instead of $400 plus domain fees.

Q: Do I need my own domains?

You can connect domains you already own, or buy them inside MailOptimal from $8 a year. We cap each domain at 5 mailboxes and recommend 3 to keep a single domain from carrying too much volume.

Q: How fast can I start sending?

Mailboxes are provisioned and authenticated in minutes. SPF, DKIM, DMARC, MX and tracking records are written automatically, then warmup ramps each mailbox before it touches a campaign.

Our own sending platform for cold outreach. Dedicated IPs, DNS written for you, from $1.00 a mailbox a month.

Buy mailboxes See pricing

$1.00

Per mailbox a month at 500+, billed annually

Dedicated

Your own sending IP, never a shared pool

Mailbox minimum, no per-seat licence

Minutes

From purchase to first authenticated send

On this page

Dedicated IPs What it costs Setup and DNS Works with your stack Calculator Compare FAQ

01 · Reputation

Dedicated IPs, because reputation is not shareable

On a shared pool one careless sender drags your placement down with them, and you never find out why. InfraOptimal sells dedicated IPs only, so the sending history attached to your mailboxes is the history you created. We check every IP against the major blocklists daily and keep reverse DNS matched to your sending domain.

Your IPs

Blocklist hits

Inbox placement

98%

Extra IP

$50/ mo

02 · Cost

Under half the price of a Workspace seat

Google and Microsoft charge an office productivity licence for a mailbox you only use to send. We charge for sending. At 100 mailboxes that is roughly $100 a month against $400 plus domain fees, and crossing a volume tier lowers the rate on every mailbox you already run.

100 mailboxes a month	Cost
InfraOptimal, dedicated IP	$100 / mo
Google Workspace, shared IP	$400 / mo
Microsoft 365, shared IP	$400 / mo
Domains, 20 at $8 a year	$13 / mo

03 · Setup

DNS you never have to open

Buy a domain in-app or point one you already own at us. SPF, DKIM, DMARC, MX, SSL and tracking records are written, verified and re-checked for you, then warmup ramps each mailbox before the first campaign step goes out.

Records set

6per domain

Per domain

5max

Domains from

$8/ yr

Warmup

Day 1

04 · Portability

Portable mailboxes, one inbox

Every mailbox comes with standard SMTP and IMAP credentials, so it runs in Instantly, Smartlead or whatever you send with today. Keep it inside MailOptimal and sender rotation, unlimited warmup and the unified inbox are already wired up.

Standard SMTP and IMAP credentials on every mailbox
Sender rotation across your whole estate
Replies land in the MailOptimal unified inbox
API and webhooks for provisioning at scale

05 · Pricing

Work out your number

How many mailboxes do you need?

100minimum 10 slots

Your cost, billed monthly

$180/ mo

Same volume on Google or Microsoft

$400/ mo

Volume tier	Per mailbox / mo
1-10 mailboxes	$2.00
11-50 mailboxes	$1.90
51-200 mailboxes	$1.80
200+ mailboxes	$1.70
500+ mailboxes	$1.60

Buy mailboxes You keep $2,640 a year at this volume

Up to 5 mailboxes per domain and 3 recommended. Bring your own domains or buy them in-app from $8 a year. Extra dedicated IPs are $50 a month. The Google and Microsoft line uses the $4 per mailbox we charge for provisioned Workspace and 365 mailboxes, before domain fees.

06 · Compare

Against the alternatives

	InfraOptimal	Google & Microsoft	Azure
Sending IP	Dedicated to your workspace	Shared provider pool	Shared pool
Price per mailbox	$2.00 down to $1.00	$4.00 flat	$0.50 at 50 per domain
100 mailboxes a month	From $100	$400 plus domains	$50
Per-seat licence	None	Yes, per mailbox	None
Time to first send	Minutes	Hours to days	Hours
Use outside MailOptimal	Yes, SMTP and IMAP	Yes	Yes
Best for	Owning your sending reputation at any volume	Small estates and named-account mail	Cheapest mailboxes at very high volume

Full side by side on the InfraOptimal vs Google and Microsoft page.

07 · FAQ

Questions, answered

What is InfraOptimal?

Our own email sending platform, built for cold outreach instead of office email. Every mailbox sends from an IP reserved for your workspace, DNS is written for you, and warmup starts on day one. Prices start at $1.00 per mailbox a month on annual billing.

Is the IP really dedicated?

Yes. InfraOptimal sells dedicated IPs only. Your mailboxes send from IPs no other customer touches, so the reputation you build belongs to you and nobody else's sending can damage it.

How does this compare to Google Workspace or Microsoft 365?

Google and Microsoft mailboxes are $4 per mailbox a month through MailOptimal and send from shared provider IPs. InfraOptimal starts at $1.00 with a dedicated IP, so 100 mailboxes cost about $100 a month rather than $400 plus domain fees. Details on the comparison page.

Is there a minimum?

Ten mailbox slots. No per-seat licence, no setup fee, and you can add slots whenever you need them. Crossing a volume tier lowers the rate on every mailbox you run.

Do I need my own domains?

Connect domains you already own, or buy them inside MailOptimal from $8 a year. We cap each domain at 5 mailboxes and recommend 3, so no single domain carries too much volume.

Can I use these mailboxes with other tools?

Yes. Each mailbox comes with standard SMTP and IMAP credentials, so it works in Instantly, Smartlead or anything else that takes a mailbox. Keep them in MailOptimal and warmup, rotation and the unified inbox are already set up.

How fast can I start sending?

Mailboxes are provisioned and authenticated in minutes. Records are written and verified automatically, then warmup ramps each mailbox before it touches a campaign.

10 mailbox minimum

Own the IP you send from

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

Buy mailboxes Book a demo