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

# Introduction

> Helo is an email API for developers and platforms

## Send your first email with Helo

Let's get you started with our quickstart guide, our step-by-step instructions for sending your very first email with Helo.

<Card title="Start here" icon="rocket" href="/getting-started/quickstart-send-with-api" horizontal>
  Follow our quickstart guide.
</Card>

## Core concepts

Learn about the key concepts and features that make Helo awesome.

<Columns cols={2}>
  <Card title="Sending transactional" icon="mail" href="/core/sending-transactional">
    Send individual messages or batches.
  </Card>

  <Card title="Sending broadcasts" icon="mails" href="/core/sending-broadcasts">
    Send a broadcast of messages.
  </Card>

  <Card title="Domains" icon="globe" href="/core/domains">
    Set up your domains for sending mail.
  </Card>

  <Card title="Channels" icon="chart-no-axes-gantt" href="/core/channels">
    Isolate your sending with channels.
  </Card>

  <Card title="Activity" icon="newspaper" href="/core/activity">
    Understand how activity works, including bounces.
  </Card>

  <Card title="Suppressions" icon="mail-x" href="/core/suppressions">
    Manage suppressions to improve deliverability.
  </Card>

  <Card title="Webhooks" icon="computer" href="/core/webhooks">
    Receive webhooks for events.
  </Card>
</Columns>

## Get human support

Do you have a question about Helo? Need a helping hand getting your email sending set up? Just want to say hi? Whatever it is, we'd love to hear from you.

<Card title="Contact us" icon="heart" href="mailto:support@helohq.com" horizontal>
  Human (!) support when you need it.
</Card>