[Dovecot] Updating Folders in Mail box

[Wade Smart]

Im looking on the dovecot documentation about how to update the folder
structure.
I had some computer problems so I back up my mail and when I
reinstalled I got rid of a bunch of unused old mail. But now when I
open my mail client it still things all of those folders are still
there. Im looking for how to update the file on what is and isnt
there.

wade