WildDuck is a modern mail server software for IMAP and POP3. Modern being scalable, Unicode-first, and API-controlled. To create a complete mail server, you can bundle WildDuck with Haraka and ZoneMTA.
WildDuck tries to follow Gmail in product design. If there’s a decision to be made then usually the answer is to do whatever Gmail has done.
This is free and open source software.
Features include:
- Fast.
- Scalable – does not use a file system to store email messages (or any data, to think of it) as everything is stored on a MongoDB cluster. WildDuck supports MongoDB sharding, so you can set up your cluster as large as you want to.
- IMAP Protocol Support – multiple newer and experimental mail server software projects offer great scalability but lack on the protocol side, usually providing only the simplistic and less capable POP3 protocol. WildDuck has first-class support for IMAP. Any email client should be able to connect to it.
- Advanced Security – does not require root privileges, does not touch the file system, does not run any shell commands, and is written in a memory-safe language. It also has some built-in security features to help secure user accounts. It supports Application-Specific Passwords and multi-factor authentication, it includes TOTP and U2F helper methods, but you can also BYO. Security events are logged and can be inspected by the user. Users can also set their GPG public key to encrypt stored emails. Authentication attempts are rate-limited to prevent brute-forcing.
- Granular Control – everything can be controlled by REST API, no need to modify config files. This means mail account settings, email access, server-side filtering, auto-replies, and even DKIM setup, to name a few.
- Cross-platform – run WildDuck on any operating system (such as Linux) that supports Node.js, MongoDB, and Redis.
Website: wildduck.email
Support: GitHub Code Repository
Developer: nodemailer
License: European Union Public License 1.2
WildDuck is written in JavaScript. Learn JavaScript with our recommended free books and free tutorials.
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