There needs to be a feature that can be selected to delete “ ALL EMAIL “. Please add this feature in the main {INBOX}. Please add this feature for the {TRASH FOLDER}. Please add this feature to operate in every additional {FOLDER} as well.

Currently this does not exist in the Yahoo mobile App. This currently does not exist when I select DESKTOP Version on my electronic device either. This is a critical feature that MUST BE PROVIDED, as it is a waste of TIME to be forced to select each individual message for deletion, and then be forced to select each individual message for deletion all over again to permanently empty the TRASH FOLDER !!!