Kolab is a full-fledged mail server, of which Roundcube is the webmail component.
It is not possible to install Kolab on ClearOS
but we are working with both communities to make possible eventually. After careful analysis, it was established that this was too much initial work and ongoing maintenance.
Thus, options are:
- Get a hosted account with Kolab Now
- How to install Roundcube on ClearOS (so fewer features but ready to go now)
- How to Install Kolab on CentOS (includes Roundcube and tons of features)