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wildduck

WildDuck is a modern, scalable mail transfer agent and IMAP server built on Node.js and MongoDB.

About wildduck

WildDuck is an MTA and IMAP server designed for high-volume email operations. It stores all data in MongoDB, which makes it easy to scale horizontally and replicate without traditional mail store file systems. It handles sending, receiving, and storing messages with a focus on performance and modern API access.

It supports IMAP, SMTP, and includes a REST API for managing mailboxes, messages, and users programmatically. It integrates with popular tools like nginx for proxy, Redis for queue management, and can be deployed on Linux using Docker or direct node installations. The project is developed by Zone EU and is built on Node.js with plugins for spam filtering and authentication.

WildDuck is open source under the AGPLv3 license. It is best suited for operators who want a mail system that can handle millions of messages per day without traditional SPOOL file systems. Notable deployments include hosting providers and large-scale email services looking for modular, API-first email infrastructure.
Email Servers

Quick Facts

Pricing
Open Source
License
Open Source
Platform
Linux
Version
2.1.0
Developer
Zone EU