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

# Product overview

> A practical map of Emailr's sending, marketing, inbox, and automation features.

## Sending

Send individual or scheduled messages with HTML, plain text, templates, attachments, custom headers, tags, and reply-to addresses through the HTTP API.

## Contacts and campaigns

Contacts store subscriber data and custom properties. Segments group contacts, topics record subscription preferences, and broadcasts deliver a template to the selected recipients. Emailr tracks delivery events and suppresses recipients who should no longer receive mail.

## Inboxes

An inbox gives your team a sending identity and a place to work with incoming conversations. Threads support replies, drafts, scheduling, labels, stars, spam, and trash. Inboxes can use signatures and can notify connected Slack channels.

## Templates

Create reusable HTML and text templates with variables and preview them before sending. Templates can be used by transactional sends and broadcasts.

## Webhooks and integrations

Webhooks deliver transactional, domain, and receiving events to your application. Emailr also supports inbound automation providers such as Zapier and n8n.

## API and access

API keys can be scoped to the resources an integration needs. Use test keys outside production and live keys in production. See the generated [API Reference](/docs/api/introduction) for the current endpoints and request schemas.