✉MailTrooper
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par avionthe dispatch bureau for email

Every email, tracked like a parcel.

MailTrooper is a transactional email API with a control room on top. Dispatch in one POST, follow the waybill from queue to click, design in blocks, and let sequences do the follow-up.

Start dispatching free Browse the gallery

85+ templates · 11 block types · 7 tracked event kinds · webhooks included

Waybill

MT-8D7E · 3309…26BB

delivered
Dispatched to the wirequeued · SES accepted14:02:11Delivered to the inboxprovider replied 250 OK14:02:59OpenedKingston, JM · iOS Mail15:47:20Link clicked/invoice/8d7e15:48:04

POST /api/v1/emails/send → 200 · 41ms

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templates in the gallery

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email block types

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tracked event kinds

0%

of the API on the dashboard

the bureau

Six departments, one counter.

Everything the dashboard does rides the same API a developer calls. Design, aim, automate and trace, without leaving the building.

the builder

Design in blocks

A drag and drop builder that compiles to bulletproof table HTML with a plain text twin. Or bring raw HTML. Both live in one gallery, editable block by block.

  • Eleven block types, keyboard reorderable, undo and redo
  • Compiles to email-safe HTML plus a derived plain text version
  • Liquid variables with a sample-data preview before you send

events

Events, pushed

Deliveries, opens, clicks, bounces and complaints POST to your endpoints as they happen. Polling is for postcards.

  • Seven event kinds with signed, retried delivery
  • Bounces and complaints suppress the address automatically
  • Subscribe per endpoint, filter by event
Your appPOST /sendMailTrooperqueue · SESInboxdeliveredYour webhooksopen · click · bounce

audiences

Audiences that compute

Segments are live filters over contact attributes. Build them visually and watch the exact count settle as you add conditions, then aim a campaign at them.

  • Attribute, tag, engagement and geography conditions
  • The audience count is exact, computed in the database
  • Membership updates itself as contacts change

audience

exact count

15,302

contacts match 1 condition

sequences

Sequences on a rail

Welcome series and win-backs as a visible chain: email, wait, branch. Insert a step anywhere and the journey still reads top to bottom.

  • Email, wait and branch steps on a vertical rail
  • Insert between, reorder, and edit inline
  • Branches route on opened, clicked or attribute

  1. Welcome aboard

    sent immediately

  2. Wait 2 days

    then continue

  3. Getting started tips

    template · onboarding-02

  4. Opened the last email?

    yes → tips · no → nudge

  5. A hand if you need it

    template · onboarding-nudge

Tour every feature

developers first

One POST. The rest is paperwork we handle.

Bearer auth, JSON envelopes, stable references. Send with a stored template and per-recipient variables, trace the reference through the ledger, and subscribe your systems to the events.

  • Idempotent sends with template slugs and liquid variables
  • Address validation with mailbox-level checks
  • Query the ledger and aggregates over HTTP
  • Webhooks for delivery, open, click, bounce and complaint
SDKscurlJavaScriptRubyElixirC#PHP
dispatch a test email
curl -X POST https://api.mailtrooper.com/api/v1/emails/send \
  -H "Authorization: Bearer $MAILTROOPER_KEY" \
  -d '{
    "to_email": "ria@example.com",
    "template": "shipped-tracking",
    "data": { "first_name": "Ria", "tracking": "MT-8D7E" }
  }'

press run to dispatch a test email and trace it

use cases

Built for the emails that carry your business.

01

for SaaS products

Transactional email your users can trust

OTPs that arrive in seconds, receipts that reconcile, lifecycle nudges that know when to stop. Wire it once over the API and watch every send in the ledger.

Read the playbook
02

for online stores

Order to doorstep, tracked like the parcel it describes

Confirmations, shipping updates, dunning and win-backs. The emails that carry your revenue deserve a waybill of their own, and here they get one.

Read the playbook
03

for marketing teams

Ship campaigns without filing a ticket

The block builder, live segments and drip sequences give a marketer everything they need to build, aim and send, while developers keep the same API and ledger underneath.

Read the playbook

the gallery

Templates for every situation.

See all designs

Magic link sign-in

Your order is confirmed

Welcome aboard

Your week in numbers

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compare

A bare API, or a bureau.

Most transactional APIs stop at send and a list of logs. MailTrooper puts the same developer-first spine under a control room your whole team can use.

See how we compare
capabilitybureaubare api
Engagement ledger with waybills✓—
Drag and drop block builder✓—
Live exact-count segments✓—
Drip sequences on a rail✓—

Questions at the counter

Is this for developers or marketers?+

Developers first: one POST sends a templated email, and everything the dashboard shows is available over the same API. The campaign and sequence tooling means the marketing team ships without filing tickets.

Do I have to use the block builder?+

No. Templates are HTML with liquid variables under the hood. Paste your own, import what you have, or mix builder templates with raw ones in the same gallery.

What happens to bounces and complaints?+

They are recorded on the contact's paper trail, the address is suppressed automatically, and the event hits your webhooks. Your sender reputation is treated like the asset it is.

Can I try it without a credit card?+

Yes. The Postcard plan is free and includes the full builder, gallery, API and webhooks at a smaller volume.

Your first dispatch is five minutes away.

Free plan, full API, all 85 templates. No card at the counter. The dispatch bureau for transactional email.

Get started See pricing