impossible deletion of subfolder into Sent !!

Hi everyone,

I find myself with an issue that seems either a bug or a lumitation I cannit tell

When one creates subfolders in the Sent Folder, it isimpossible to delete.

Cyrus does not seem able to delete any subfolder created in mandatory folders : Sent, Trash, Junk

How can I delete those?

any help or workaround would be very appreciated as i m a bit desperate…