Wildduck Mail Server
WildDuck is a scalable no-SPOF IMAP/POP3 mail server
WildDuck is a modern IMAP/POP3 server built on Node.js and MongoDB. Bundle it with Haraka (inbound SMTP) and ZoneMTA (outbound SMTP) for a complete mail server. Best suited for 1000+ accounts that need horizontal scaling. For smaller setups, consider Postfix+Dovecot.
Scalable
Everything is stored in MongoDB with sharding support. All instances are stateless — add more behind a load balancer to increase throughput.
Full IMAP Support
First-class IMAP4rev1 with IDLE, CONDSTORE, COMPRESS, SPECIAL-USE, UTF8, QUOTA, and more. Any email client should work out of the box.
Unicode Native
Full support for internationalized email addresses, folder names, and headers. андрис@уайлддак.орг is a valid address.
API Controlled
Manage everything via REST API — accounts, mailboxes, messages, filters, auto-replies, DKIM, and more. No config file editing needed.
Secure by Design
No root privileges, no filesystem access, no shell commands. Includes 2FA (TOTP + WebAuthn), application passwords, PGP encryption, and audit logs.
No Single Point of Failure
Every component can be replicated. MongoDB replica sets, Redis Sentinel, and multiple stateless app servers eliminate single points of failure.
Try It Out
webmail.wildduck.email is a live demo. Register a free @wildduck.email address and test with the web client or your own IMAP app.
Outbound delivery from wildduck.email is disabled to prevent spam abuse.
Licensed under EUPL 1.2 · [email protected]