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"
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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.
50M+
Monthly Emails
98%
Inbox Rate
8
Redundancy layers
3
Assets Managed
Choose how you send
One email infrastructure.
Two ways to use it.
Same infrastructure. Two ways to send. Use Mission Inbox beneath the campaign tools your team already uses. If you’re a developer, connect your own systems directly through API and SMTP.
Outbound Email Infrastructure
Developer Email Infrastructure
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.
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.
Outbound Email Infrastructure
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Developer Email Infrastructure
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.
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.
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.
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.
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.
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.
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.
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.
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.
Built for how you actually send
Infrastructure for every team sending at scale.
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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.
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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.
View Integrations
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.
import { MissionInbox } from 'missioninbox';
const mi = new MissionInbox('mi_xxxxxxxxx');
await mi.emails.send({
from: 'you@yourdomain.com',
to: 'user@example.com',
subject: 'Hello World',
html: '<strong>it works!</strong>'
});
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 Intergrations
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
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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."
"Deliverability used to be my #1 problem. Now, it's like 2009-2012 again; just bogged down with unlimited leads and meetings
"
"
"85% open rates across our client campaigns"
"Always-there support and above-and-beyond deliverability"
"Best-in-class support with seamless onboarding"
"Feels like part of our internal team"
"Makes complex deliverability easy to understand"
"A platform we’re glad finally exists"
Everything You Need to Know Before You Send
Clear answers on setup, infrastructure and how Mission Inbox fits into your existing workflow.
Contact Us
What is Mission Inbox?
Does Mission Inbox replace Google Workspace or Microsoft 365?
Is Mission Inbox a sequencer?
Who is Mission Inbox built for?
What types of email can I send?
What are Isolated Cubes?
What is MI Shield™?
Do I get dedicated IPs?
Can I see what happens after emails are sent?
What happens if one route has an issue?
How fast can I get set up?
Can I keep using my existing tools?
Where do replies go?
Can I test Mission Inbox before connecting my own setup?
When can I send live email?
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.
© 2026 Mission Inbox Inc, All Rights Reserved | Property of Mission Inbox Inc
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