---
title: "Haraka SMTP Email Server"
description: "Haraka is an open source SMTP server written in Node.js. Haraka is fast, scalable, and extensible."
canonical_url: "https://haraka.github.io"
---
# Haraka SMTP Email Server

> Haraka is an open source SMTP server written in Node.js. Haraka is fast, scalable, and extensible.

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Haraka

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*A modern, high performance, flexible SMTP server*. Haraka is an open source SMTP server written in Node.js which provides extremely high performance coupled with a flexible plugin system allowing JavaScript programmers full access to change the behaviour of the server. It is used heavily in some high traffic sites - see the [Known Users](https://haraka.github.io/users) page for testimonials.

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Get Started

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Open on GitHub

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```bash
npm install -g Haraka
```

</div>

## Resources for Agents

- [API catalog: every service document this site publishes](https://haraka.github.io/.well-known/api-catalog)
- [Sitemap (XML)](https://haraka.github.io/sitemap.xml)
- [Sitemap (Markdown): every page on the site](https://haraka.github.io/sitemap.md)
- [MCP server card: MCP endpoint at https://haraka.github.io/mcp](https://haraka.github.io/.well-known/mcp/server-card.json)
- [MCP endpoint (streamable HTTP)](https://haraka.github.io/mcp)
- [llms.txt: index of the documentation for LLMs](https://haraka.github.io/llms.txt)
- [llms-full.txt: the full documentation as a single file](https://haraka.github.io/llms-full.txt)
- [OpenAPI document: every route this site serves to agents](https://haraka.github.io/openapi.json)


## Sitemap

See the full [sitemap](https://haraka.github.io/sitemap.md) for all pages.