Issue
Folders created using an IMAP client, Squirrelmail and/or Roundcube do not show up in the UebiMiau Webmail Interface. Folders created in UebiMiau do not show up in other clients such as IMAP clients, Squirrelmail and Roundcube.
Solution
There is no solution yet, but a workaround. You can simply switch to using Squirrelmail or and popular IMAP Client.