Namecheap Private Email
(powered by Open-Xchange) is open-source collaboration software that meets all necessary needs for email, calendar and contacts, task management and document storage.
Namecheap Private Email Business packages will enable you to create a public space in shared folders, set and control tasks,
create and manage work schedules, monitor the availability of
colleagues for participating in meetings/discussions, share data:
control who has access to specific files, etc.
Namecheap Private Email also offers social networking features, allowing automated publishing and subscription between instances of Namecheap Private Email Server and social platforms such as Facebook, along with various Google services.
Therefore, Namecheap Private Email is an excellent option for organizations looking to enhance teamwork and collaboration.
Namecheap Private Email User Guide can be found
here.