Read the documentation related with PH Cloud webmail.
In addition to the DAV server PH Cloud is also a fully featured IMAP email client.
Read more: How To Use Email Client
You can use the Mail Client from both back and front end. Also it is possible to integrate the component with other extensions.
Read more: Integrate with other extensions
The follow keyboard shortcuts are available for some buttons:
Read more: Keyboard Shortcuts
Read more: Technical Requirements