Transactional email infrastructure

Transactional email infrastructure for messages customers cannot miss

Send password resets, verification codes, receipts and account alerts through a reliable email API or SMTP with dedicated infrastructure and detailed delivery data.

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Reliable transactional email delivery

Protect the emails your product depends on

Keep transactional traffic separate from marketing campaigns, control the infrastructure behind each send and quickly diagnose delivery problems.

Keep critical email separate from bulk campaigns

Send password resets, verification codes and receipts through infrastructure isolated from newsletters and promotional campaigns. A poor-performing marketing send should not put essential customer email at risk.

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Send through API or SMTP

Connect your application through the Mission Inbox REST API or SMTP. Trigger individual messages directly from your product, platform or existing email workflow.

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See what happened to every email

Use message logs, delivery events and webhooks to trace each send and investigate failures. Your team gets the data needed to find problems without guessing.

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Explore Features

Everything needed to send transactional email reliably

Connect your product, isolate important traffic and monitor every message from send to delivery.

Transactional email API

Trigger receipts, verification emails, alerts and other product messages through a REST API.

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SMTP relay

Connect applications and platforms that already support SMTP without rebuilding your sending workflow.

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Dedicated IPs

Build a sending reputation based on your own traffic instead of relying on an IP pool shared with unknown senders.

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Logs and webhooks

Track message activity and send delivery events back to your application or internal systems.

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Platform View

A look inside Mission Inbox

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.

Transactional email infrastructure FAQs

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

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Protect your sending reputation before the first email goes out.

MI Shield is included with every Cube, so every workload gets pre-send protection from day one.

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