Mail hosting made simple
Disposable webmail server (similar to Mailinator) with built in SMTP
Insular email distribution - mail server as Docker images
Fast and easy-to-use webmail front-end for your existing mail server.
Simple, modern & fast web-based email client
An unofficial web console to administer Apache James 3 server
To synch and encrypt all sorts of data across different sources
Linux Mail Server with Calendaring and IM