The Webmail option will allow you to check your mailbox from a web interface. This is handy when you wish to check your mailbox on a computer, where you don’t have a mail client installed or from an internet-enabled device.
To log in into the webmail for a selected mailbox, click on the name of the mailbox. A new windon will pop up, with icons for the 3 available mail clients – RoundCube, Horde, Supreme Webmail. Simply click on the icon of the preferred mail client and you will be logged in.