SMTP Folders as tree view

Due to the fact that I have already a lot of SMTP folders: These folder are always shownn in a longer list, where each level is separated with ‘/’ what makes the handling a little bit confusing. Is there a possibility to show that folders in an exendable /
collapsable tree view? If so how could I select this setting?

Currently this is not possible. If you search the forum for “folder tree” you will find 4 other messages asking for the same.
So, let’s see if this kind of feature will be implemented in future - I would vote for it.