Try out the latest version of Atmail's commercial on-premise email server. The source is open for you to modify if needed. Explore the new features in our online demo or download the source to evaluate on your own server.
Building on Atmail's enterprise proven corporate email platform and offering it as a reliable white-labeled cloud service, Atmail Cloud is a hassle-free alternative to running your own email server. Give the free 14 day trial a go.