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. You should consider using WildDuck when you have a large number of email accounts (1000+) with large quotas as WildDuck is designed to scale horizontally. For a smaller setup where everything fits i