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.

Email infrastructure for every workload

The infrastructure behind every email your business sends.

Mission Inbox gives sales and marketing teams the sending infrastructure behind high-volume campaigns, while developers use the same platform to send email from their products. Keep every workload separate, protected and under control.

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Trusted by teams sending 50M+ emails per month

"Super happy with the results. I'm seeing a 33% reply rate with over 54% positive replies on one campaign, and 74% open rates with zero bounces"

Sary Jalkh

Growth Lead

Case Study

50M+

Monthly Emails

98%

Inbox Rate

8

Redundancy layers

3

Assets Managed

Who are you?

One infrastructure.
Two ways to use it.

Tell us how you send and we will show you the version built for it.
Buttons: I run outbound / I build product

Outbound Email Infrastructure

Run campaigns through infrastructure built for outbound. Connect your CRM, sequencer or campaign tool to Mission Inbox mailboxes and sending environments. Keep the workflow your team already uses while improving the infrastructure underneath it.

See Outbound Email Infrastructure

SMTP mailboxes for campaign sending

Connect the tools your team already uses to run outbound.

Dedicated sending environments & Domains

Give campaigns the setup they need without relying on generic mailbox limits.

Works with your existing sequencer and CRM

Keep agency clients, teams and campaigns from affecting each other.

Email for Developers

Send email from your product without building the sending layer yourself. Connect your application through the Mission Inbox Email API or SMTP. Send transactional, product and programmatic email while Mission Inbox handles the infrastructure behind delivery.

Explore Email for Developers

API and SMTP sending

Connect your application directly to Mission Inbox.

Product and transactional email

Send password resets, invoices, alerts, onboarding emails and notifications.

Webhooks, delivery events and message logs

See what happened after every send and send that data back into your product.

Field of pink and orange flowers with grass under a clear sky and mountain silhouette in the background at sunset.

Isolated Sending Infrastructure

Your sending infrastructure should not depend on someone else’s reputation.

Sales outreach, marketing campaigns and product email should not all depend on the same sending environment. Mission Inbox separates workloads so a problem in one stream does not put another at risk.

Dedicated email infrastructure isolating business mailboxes from shared sending environments

You're not sharing with anyone. Ever.

Dedicated IPs and isolated sending environments so your inbox placement is not affected by crowded shared pools where you have no control over who you are sharing a reputation with.

Create Demo Account

Business email infrastructure owned and controlled directly by the sender

You own it. Nobody can take it away.

Mission Inbox owns the infrastructure your emails run through. No middlemen or resellers controlling your limits, your reputation or your data.

Create Demo Account

High-volume emails flowing through dedicated infrastructure with delivery monitoring

Send at volume without limits or consequences

Built for high volume. No throttling, no flags, no blacklists for sending the volume your business actually needs.

Create Demo Account

Shared email infrastructure showing one sender damaging the reputation of connected mailboxes

Someone else's spam problem just became yours

Many email providers place senders in shared IP pools by default. When another sender damages the reputation of that pool, your inbox placement can suffer too, even when your own sending is clean.

Move to Mission Inbox

Google and Microsoft email accounts disconnected after a third-party reseller shutdown

One shutdown away from losing everything

Cheap resellers are just middlemen between you and Google or Microsoft. When they get shut down or blocked, your sending goes with them overnight. You are not buying infrastructure. You are renting someone else's risk.

Move to Mission Inbox

Google and Outlook restricting high-volume email sends through standard business accounts

Google and Outlook don't want you sending at volume

Google and Outlook have entire teams dedicated to stopping high-volume sending. Push past their limits and they will flag, throttle and blacklist you.

Move to Mission Inbox

Built for how you actually send

Infrastructure for every team sending at scale.

Sales Teams

Run cold outreach through dedicated mailboxes and infrastructure built for volume.

Agencies

Manage client sending environments without mixing every client into the same reputation pool.

Marketing Teams

Keep promotional campaigns separate from sales and product email.

Recruiters

Run high-volume candidate outreach without burning a domain.

RevOps & GTM Teams

Coordinate outbound sending across multiple tools and reps from one place.

Founders & BD

Run your own outbound before there's a dedicated sales or marketing hire.

Transactional Email

Password resets, login codes, invoices, receipts and account alerts.

Product Notifications

Onboarding, in-app triggered updates and status changes.

Platforms & Marketplaces

Multi-tenant apps sending email on behalf of their own users.

AI Agents & Automations

Agents and workflows sending programmatically, with no human in the loop.

Internal Tools & Ops

Scripts, monitoring alerts and internal reporting email.

Product-Led Growth

Lifecycle and activation email triggered from inside the app itself.

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.

Build email into your product. Skip the infrastructure.

Use Mission Inbox APIs, SDKs and webhooks to create inboxes, send email, receive replies and trigger workflows from your existing stack.

The Mission Inbox infrastructure

Three Layers. Zero Compromise.

The Cubes

Your Own Server. Not a Slice of Someone Else's.

Send through isolated server instances and dedicated IPs instead of sharing reputation with unknown senders. Sales, marketing, transactional and financial email stay separate. Scale from 10k to 50M sends without touching anyone else's reputation.

Dedicated IPs and server instances

Separate Cubes for each sending workload

Scale from 10K to 50M+ monthly emails

MI Shield™

Every Email Checked Before It Leaves.

‍MI Shield checks content, headers, DNS and spam signals before sending. Risky emails are identified before they can damage your domain or sending reputation.

Real-time content analysis

Spam pattern and anomaly detection

Header and DNS validation

API, SMTP and Integrations

Connect without rebuilding your workflow

Send through a REST API, drop in SMTP credentials, or connect the tools you already use. Most teams are sending within an hour and nothing about how you work has to change.

RESTful API with SDKs across six languages

Plug-and-play SMTP connection

Real-time webhooks and delivery events

Platform View

A look inside Mission Inbox

Email dashboard showing send requests, credits used, domains, mailboxes, and email activity graph.

Mission Inbox dashboard showing outgoing messages with subjects, dates, sizes, and statuses like Sent, Pending, SoftFail.

Mission Inbox dashboard showing 5 total and active projects with project names, domains, mailboxes, and creation dates.

Dashboard of Mission Inbox showing 716 mailboxes, all associated with Anthony Baltodano and currently disabled.

A look inside Mission Inbox

Mission Inbox interface showing API Sending panel with email sending form, curl command, and API key details.

Mission Inbox API Sending page showing Inbound Webhook setup, prerequisites, and API key management.

Mission Inbox interface showing sent outgoing messages with subjects, dates, sizes, and statuses in dark mode.

Mission Inbox Platform API settings showing live API key and analytics cube configuration details.

Comparison

How Mission Inbox Stacks Up

Feature

Cold email friendly

Dedicated IPs included

Isolated servers

Mailbox provisioning

Pre-send quality check

Deliverability insights

Warm-up support

API access

3-continent failover

Under 5-min setup

Mission Inbox

Mailforge

Mailreef

Maildoso

Feature

Built for transactional and product email

API and SMTP sending

Delivery webhooks

Message logs and delivery events

Dedicated IPs without an add-on

Workload isolation

Pre-send checks before email leaves

Deliverability insights

Managed IP warm-up

3-continent failover

Mission Inbox

Resend

SendGrid

Mailgun

~ Available on selected plans or with additional setup.

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

MI Shield™ protection

Analytics and sending logs

Overage - Pause account and Upgrade

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*

10,000 sends per month*

Dedicated IP addresses

MI Shield™ protection

Analytics and sending logs

Additional mailboxes and sending volume work on a pay as you go model at $3 per mailbox and $1 per thousand sends

Pro

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

$99

/ Month

Start Sending at Scale

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

Testimonials

We always deliver

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

"Mission Inbox deliverability is now neck & neck with G-suite and microsoft infra, and in our case, 2x better."

Ali Syed

Founder

"Deliverability used to be my #1 problem. Now, it's like 2009-2012 again; just bogged down with unlimited leads and meetings
"

Dmitriy Katsel

Owner

"85% open rates across our client campaigns"

Hussain Hazari

Founder

"Always-there support and above-and-beyond deliverability"

Usama Saif

Head of Growth

"Best-in-class support with seamless onboarding"

Alp A.

"Feels like part of our internal team"

Jayson D

Founder & CEO

"Makes complex deliverability easy to understand"

Alp Aysan

"A platform we’re glad finally exists"

Freek de Bresser

View All Testimonials

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.

Thank you! Your submission has been received!

Oops! Something went wrong while submitting the form.

The infrastructure behind every email your business sends.

50M+

98%

8

3

One email infrastructure.Two ways to use it.

Outbound Email Infrastructure

SMTP mailboxes for campaign sending

Dedicated sending environments & Domains

Works with your existing sequencer and CRM

Email for Developers

API and SMTP sending

Product and transactional email

Webhooks, delivery events and message logs

One infrastructure. Two ways to use it.

Outbound Email Infrastructure

SMTP mailboxes for campaign sending

Dedicated sending environments & Domains

Works with your existing sequencer and CRM

Email for Developers

API and SMTP sending

Product and transactional email

Webhooks, delivery events and message logs

Your sending infrastructure should not depend on someone else’s reputation.

You're not sharing with anyone. Ever.

You own it. Nobody can take it away.

Send at volume without limits or consequences

Someone else's spam problem just became yours

One shutdown away from losing everything

Google and Outlook don't want you sending at volume

Infrastructure for every team sending at scale.

Integrations

Keep your mailbox. Upgrade the infrastructure behind it.

Build email into your product. Skip the infrastructure.

Three Layers. Zero Compromise.

The Cubes

MI Shield™

API, SMTP and Integrations

A look inside Mission Inbox

How Mission Inbox Stacks Up

Send with total confidence, at any volume

Lite

Scale

Pro

We always deliver

Everything You Need to Know Before You Send

Send at volume with Mission Inbox

One email infrastructure.
Two ways to use it.

One infrastructure.
Two ways to use it.