> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/getrupt/sendook/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Learn about Sendook - the easiest way to send and receive emails at scale

## What is Sendook?

Sendook (Arabic for "box" - صندوق) is the easiest way to start sending **AND receiving** emails at scale. Built with developers in mind, Sendook provides a simple API and SDK to handle all your email needs.

## Why Sendook?

Sendook was built to solve real problems we encountered while building [Rupt](https://www.rupt.dev):

<CardGroup cols={2}>
  <Card title="Simple Email Setup" icon="envelope">
    Setting up email sending at scale is still cumbersome - Sendook makes it simple with just a few API calls
  </Card>

  <Card title="Custom Domain Support" icon="globe">
    Configure and verify custom domains with automatic DNS record management
  </Card>

  <Card title="Receive Emails" icon="inbox">
    Unlike most email APIs, Sendook handles both sending and receiving emails with webhooks
  </Card>

  <Card title="Production Ready" icon="rocket">
    Used extensively at Rupt for internal agents to handle inbound emails, payments, and prioritizations
  </Card>
</CardGroup>

## Key Features

### Inboxes

Create and manage email inboxes with ease:

* Use `@sendook.com` domain (no verification needed)
* Connect custom domains with automatic DNS verification
* List, retrieve, and delete inboxes
* Automatic inbox deletion includes all associated messages

### Messages

Full-featured email messaging:

* **Send emails** with To, CC, BCC, and attachments
* **Thread management** - replies automatically thread conversations
* **Labels** for organizing messages
* **Search** with regex support across to, from, CC, subject, and body
* **Rate limiting** - 100 messages per hour per inbox

### Webhooks

Real-time email event notifications:

* `message.received` - Get notified when emails arrive
* `message.sent` - Track when emails are sent
* `message.delivered` - Confirm delivery status
* `message.bounced` - Handle bounced emails
* `message.rejected` - Track rejected messages
* `inbox.created` - Monitor new inboxes
* `inbox.deleted` - Track inbox deletions

### Domains

Custom domain management:

* Add custom domains to your account
* Automatic DNS record generation (MX, DKIM, SPF, DMARC)
* One-click domain verification
* Full CRUD operations for domain management

## How It Works

<Steps>
  <Step title="Get Your API Key">
    Sign up at [sendook.com](https://sendook.com) and get your API key from the dashboard
  </Step>

  <Step title="Create an Inbox">
    Create an inbox using either a `@sendook.com` email (instant) or your custom domain (requires DNS verification)
  </Step>

  <Step title="Send & Receive Emails">
    Use the API or SDK to send emails and set up webhooks to receive incoming messages
  </Step>
</Steps>

<Note>
  Using `@sendook.com` emails requires no verification. Custom domains need DNS records configured (MX for receiving, DKIM/SPF/DMARC for sending).
</Note>

## SDKs & Tools

Sendook provides multiple ways to integrate:

<CodeGroup>
  ```bash npm theme={null}
  npm install @sendook/node
  ```

  ```bash yarn theme={null}
  yarn add @sendook/node
  ```

  ```bash bun theme={null}
  bun add @sendook/node
  ```
</CodeGroup>

**Available SDKs:**

* Node.js / TypeScript (Official)
* Python (Coming soon)
* REST API for any language

## Open Source

Sendook is open source software licensed under the MIT license. You can:

* Self-host the entire platform
* Contribute SDKs for additional languages
* Report issues and request features on GitHub
* Review the source code and security practices

<Card title="View on GitHub" icon="github" href="https://github.com/ruptlabs/sendook">
  Explore the source code, contribute, or report issues
</Card>

## Next Steps

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Get started in 5 minutes
  </Card>

  <Card title="API Reference" icon="code" href="/api/overview">
    Explore the complete API
  </Card>
</CardGroup>