Haraka is a modern SMTP server written in Node.js for handling inbound and outbound mail processing.
It is designed as a fast mail transfer layer that can be integrated with other mail components, making it suitable for filtering, relaying, submission, and custom mail-handling workflows rather than acting as a full mail store or IMAP server.
This is free and open source software.
Key Features
- Uses a modular plugin architecture that lets administrators and developers extend SMTP behaviour with JavaScript plugins.
- Built for high performance, with support for large numbers of concurrent connections and high message throughput.
- Can be deployed as a filtering mail transfer agent or as a mail submission agent with authentication and DKIM support.
- Includes a built-in outbound delivery engine with queueing and retry handling for relayed mail.
- Offers a broad plugin ecosystem covering areas such as spam filtering, DNS blocklists, HELO validation, SPF, DKIM, logging, and Redis integration.
Website: github.com/haraka/Haraka
Support:
Developer: Matt Sergeant
License: MIT License
Haraka is written in JavaScript. Learn JavaScript with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
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