i think this is not a bug, we have several "special" folder types such as "Sent Items". There is only one folder that can contain sent items or be a special folder. Subfolders of Sent Items are simply IMAP folders such as all other folders. At least this is my understanding of typical IMAP folder hierarchies. Don't get me wrong, i understand the purpose of such folder handling and i know that at least Thunderbird handles it that way. It may be useful to have such kinds of folders and it's a valid feature enhancement yet not a bug since we never intended special folder capabilities to be inherited by subfolders

Thanks for the Idea!
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