By default, the Horde webmail client is configured to display all the other email accounts that created from your [cPanel >> Email accounts >>] if you access webmail using the main cPanel account, cPanel >> Webmail >>
You can display/hide it from Horde >> Options >> Edit options for >> Mail >> Server and Folder Information >> Use IMAP folder subscriptions >> Enabled.
When the "Use IMAP folder subscriptions" option is enabled, the additional email folders will disappear from the main cPanel account.
You can keep it disabled if you need quick access to all email accounts and to check all email addresses at once. If you want to keep all email accounts private then you should have to enable the above mentioned option.
You can display/hide it from Horde >> Options >> Edit options for >> Mail >> Server and Folder Information >> Use IMAP folder subscriptions >> Enabled.
When the "Use IMAP folder subscriptions" option is enabled, the additional email folders will disappear from the main cPanel account.
You can keep it disabled if you need quick access to all email accounts and to check all email addresses at once. If you want to keep all email accounts private then you should have to enable the above mentioned option.