> ## Documentation Index
> Fetch the complete documentation index at: https://docs.railmail.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Railmail is an email marketing platform you can drive entirely through an API.

Railmail lets you manage subscribers, topics, consents, campaigns, segments and automations for your email marketing — from a dashboard or entirely through the [Railmail Public API](/en/api-reference/introduction).

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/en/quickstart">
    Get from an API key to your first subscribed user in a few minutes.
  </Card>

  <Card title="API Reference" icon="code" href="/en/api-reference/introduction">
    Explore all endpoints with an interactive playground you can call from the docs.
  </Card>

  <Card title="Authentication" icon="key" href="/en/api-reference/authentication">
    Learn how project-scoped API keys and scopes work.
  </Card>

  <Card title="Errors" icon="triangle-exclamation" href="/en/api-reference/errors">
    Understand Railmail's RFC 7807 error format and status codes.
  </Card>
</CardGroup>

## What you can do

* **Subscribers, topics and consents** — add users, organize them into topics, and record per-topic consent (including double opt-in).
* **Campaigns** — create, schedule and send email campaigns, then read their reports.
* **Segments and custom fields** — target the right people with dynamic segments and custom subscriber data.
* **Automations** — build and control automated email workflows.
* **Sending domains** — configure and verify your own sending domain via DNS.

Everything above is available through the API, so you can integrate Railmail directly into your product.