---
title: "Transactional email"
description: "Deliver receipts, password resets, and alerts your users actually receive. A fast REST API and SMTP relay, idempotent sends, signed webhooks, and per-message tracking — on infrastructure built for deliverability."
url: https://www.unitpost.com/transactional
section: "Marketing"
updated: 2026-07-31
---
# Transactional email

> Deliver receipts, password resets, and alerts your users actually receive. A fast REST API and SMTP relay, idempotent sends, signed webhooks, and per-message tracking — on infrastructure built for deliverability.

## Highlights

- REST API and SMTP on the same send pipeline
- Idempotency keys so retries never double-send
- Signed webhooks for delivery, bounce, complaint, open, click
- Per-message tracking and dashboard observability

## Links

- [Docs](https://www.unitpost.com/docs)
- [Pricing](https://www.unitpost.com/pricing)
- [OpenAPI](https://www.unitpost.com/api/v1/openapi.json)