Only user-created folders and sub-folders can be renamed. The main folders of the account (Inbox, Flagged, Sent, Drafts, Trash, Spam) cannot be renamed.
To rename a folder, do the following:
1.In the Folders setting section hover the cursor over the folder in the list and click the button which appears in the line with the folder name. The Edit folder window will open.
2.Enter a new folder name.
3.Click Save. The name of the folder will be changed.