What is Mission Inbox?

Mission Inbox is the sending infrastructure behind outgoing email. It helps teams send sales, marketing, transactional and product emails through dedicated infrastructure built for volume and inbox placement.

Does Mission Inbox replace Google Workspace or Microsoft 365?

No. You still use your normal mailbox to read, manage and reply to email. Mission Inbox handles the sending layer behind outgoing email.

Is Mission Inbox a sequencer?

No. Mission Inbox does not build campaigns, manage contacts or write sequences. It works underneath your CRM, sequencer, product or existing tools.

Who is Mission Inbox built for?

Mission Inbox is built for teams that rely on outgoing email, including sales teams, agencies, marketing teams, platforms, developers and businesses sending transactional or financial email.

What types of email can I send?

You can send sales outreach, marketing campaigns, product notifications, password resets, invoices, alerts and other outgoing email workloads.

What are Isolated Cubes?

Isolated Cubes are separate sending environments for different workloads. Sales, marketing, transactional and financial email can each run separately so one stream does not damage another.

What is MI Shield™?

MI Shield checks content, headers, DNS and spam signals before emails are sent. It helps catch risky emails before they damage your domain or reputation.

Do I get dedicated IPs?

Yes. Mission Inbox uses dedicated IPs and isolated infrastructure instead of placing your sending inside crowded shared pools.

Can I see what happens after emails are sent?

Yes. You can view analytics, logs, delivery activity, bounces, sending health and performance from inside the platform.

What happens if one route has an issue?

Mission Inbox is built with redundancy across three continents. If one route has a problem, email can continue moving through another.

How fast can I get set up?

Mission Inbox is built for setup in under five minutes. You can also get help from the team if you want support getting everything connected.

Can I keep using my existing tools?

Yes. Mission Inbox can work with your current mailbox, CRM, sequencer, product or API workflow.

Replies go back to the mailbox your team already uses, so conversations stay inside your normal workflow.

Can I test Mission Inbox before connecting my own setup?

Yes. Demo Mode lets you explore the full platform with preloaded domains, mailboxes, messages, analytics and logs.

When can I send live email?

You can preview the platform in Demo Mode first. To connect your own setup and send live email, choose a paid plan and start sending.

Send emails that get seen, not just delivered.

Get prewarmed mailboxes on dedicated IPs for your cold outreach, and an API for your transactional emails. Mission Inbox handles deliverability, so you can focus on booking meetings and building your product.

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✓ No credit card needed

✓ 10 min setup

✓ Auto-DNS

or book a demo →

“33% reply rate with over 54% positive replies.”

Sary Jalkh, Growth Lead at Vessel.co

“10–15% reply rates, up to 37.5% positive replies.”

Gabriel Martinez, CEO at Reachflow

“Increased my reply rate from 3% to over 10%.”

Cesar Ballesta, cold email agency owner

“Over 85% open rates across all of our clients’ campaigns.”

Hussain Hazari, Founder at Outbound Gen

“Mission Inbox handles all our deliverability.”

Rohan, Bluebirds

“Consistently came out on top, with 0 blacklist reports.”

Thomas Tzouridis, Owner & CEO

“Neck and neck with GSuite and Microsoft, actually 2x better.”

Citrus Teams

“We’ve scaled Mission Inbox to 90% of our ESP mix for outbound.”

Charlie Hughes, ORCA

“Got my clients’ inboxes moved and set up within 20 minutes.”

Jessica D., cold email agency owner

“14.57% reply rate, 34% interested, 0.5% bounce rate.”

Dmitry Katsel, Founder at SpringTheory

4.9 4.3

Trusted by teams sending 50M+ emails per month

Mission Inbox Quick Demo

Your control panel for
hitting top-tier deliverability

For Cold Emails & Transactional Emails

Which emails do you send?

Pick a role and check out what's built for you.

COLD EMAILERS

I run outbound.

Mailboxes and dedicated IPs for Instantly, Smartlead, Apollo and more.

Developers

I send from my product.

API and SMTP for transactional, product and AI-agent emails.

Your reputation, no one else's.

Every mailbox runs on dedicated IPs that are yours alone. No shared pools, so other senders' poor practices never hurt your domain reputation or your campaigns.

MI Shield protecting email content, domains and sender reputation

Guarding your email,
all the way to the inbox.

MI Shield, our proprietary AI, scans content, headers and DNS before every outbound send, so one low-quality email never burns your domain. 50M+ emails checked monthly.

Scale campaigns at will.

One-click mailbox creation and automatic DNS setup. New mailboxes are live in minutes and ready for your sequencer. Spend your time on campaigns, not configuration.

Mission Inbox connecting to sequencers and CRMs via SMTP and integrations

Start Free

✓ No credit card needed ✓ 10 min setup ✓ Auto-DNS

Send in five lines.

One API call, or point your existing SMTP client at us. SDKs for the languages your team already uses.

send.sh

curl https://api.missioninbox.com/v1/send \
  -H "Authorization: Bearer $MI_API_KEY" \
  -d from="you@yourapp.com" \
  -d to="user@example.com" \
  -d subject="Welcome aboard"

Dashboard showing live email delivery events, webhooks and logs

See every send.

Webhooks, delivery events and message logs for every email, so you always know what happened and why.

Isolated from your marketing traffic.

Password resets, receipts and alerts run on their own dedicated infrastructure, apart from your campaigns.

Sales, marketing, transactional and financial email kept on separate infrastructure

Get a Free API Key

✓ No credit card needed ✓ Dedicated IPs ✓ API & SMTP

Connect without rebuilding your workflow

Integrations

Keep your mailbox. Upgrade the infrastructure behind it.

Continue using the mailbox, CRM, sequencer or product your team already knows. Mission Inbox just becomes the infrastructure behind it.

Pricing

Send with total confidence, at any volume

Lite

For individuals and small teams that need reliable mailboxes and dedicated sending infrastructure.

$50

/ Month

Start Sending

15 mailboxes included

5,000 sends per month

Dedicated IP addresses

Analytics and sending logs

Need more? Upgrade anytime.

For Additional mailboxes and sending volume user must upgrade

Scale

For Agencies, Startups and Companies that require mailboxes to serve their clients and Team.

$199

/ Month

Start Sending

30 mailboxes included*

Unllimited sends*

Dedicated IP addresses

Aged domains available

Analytics and sending logs

MI Shield™ protection

*$1 per 1,000 emails, additional mailboxes $3 each

Free

For developers testing and shipping their first transactional emails through our API or SMTP.

/ Month

Start Free

No credit card needed

600 free emails to start

API and SMTP sending

Send, receive and track delivery status

Upgrade to Pro anytime

Pro

For platforms and enterprises sending high-volume email directly through our API.

$99

/ Month

Get Your API Key

No credit card needed

5 Domains Included

100K sends per month

Dedicated IP addresses

MI Shield™ protection

Send, receive and track delivery status

Additional domains: $2 per domain

Additional emails: $1 per 1000 sends

Comparison

How we stack up against the competition

Pick the provider you're considering and see the difference side by side.

Feature

Mission Inbox

Compare with Mailforge

Full Mission Inbox vs Mailforge breakdown

Feature

Mission Inbox

Compare with Resend

Partial = available on selected plans or with additional setup.

We always deliver

Teams that rely on email, run on Mission Inbox. See what changed after they moved away from shared sending infrastructure.

33%

reply rate

“33% reply rate, 54% positive replies.”

Sary Jalkh

85%

open rates

“85% open rates across our client campaigns.”

Hussain Hazari

2×

vs. G-Suite and Microsoft

“2× better than G-Suite and Microsoft infra.”

Ali Syed

[Metric]

[Result label]

[Customer quote with a result]

[Name]

Everything You Need to Know Before You Send

Clear answers on setup, infrastructure and how Mission Inbox fits into your existing workflow.

Send at volume with Mission Inbox

Stop relying on shared infrastructure that you don't control. Mission Inbox gives you dedicated servers, dedicated IPs, and full ownership of your sending reputation.

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Outbound Launch Kit

2 domains + 10 mailboxes + 14-day warmup

Enter your work email to claim it and go straight to setup. No credit card needed.

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Free launch kit →

Outbound

Send emails that get seen, not just delivered.

Your control panel for
hitting top-tier deliverability