Haraka is an open-source SMTP server solution built on Node.js, designed for high performance and scalability. Capable of handling thousands of concurrent connections and delivering messages at remarkable speeds, Haraka is optimized for use with various plugins to enhance functionality, including robust spam protection and filtering capabilities. It operates efficiently as a Mail Submission Agent (MSA) and integrates seamlessly with traditional mail transfer agents (MTAs) for optimal email management.

The platform is particularly suited for businesses of all sizes, from small startups to large enterprises, and is especially beneficial for roles such as project managers and finance professionals. Haraka's extensible plugin architecture allows for easy customization and scalability, making it a versatile choice for users seeking a reliable mail delivery engine. Additionally, it provides comprehensive documentation to assist users in maximizing its capabilities.