We have extended the option to brand the Roundcube webmail client for your customers.
Now, your store name will be added automatically to the header area of the Roundcube’s log-in page as shown here:
Also, your store name will be featured right below the log-in form on the page as displayed here:
You do not need to do anything to activate this option. It is enabled by default.
For now, the Roundcube branding option is available with a Private DNS package activated for your domain.