KMail/IMAP cannot add top-level folder

[Patrick O'Callaghan]

On Sat, 2012-06-16 at 18:56 +0300, Eli Wapniarski wrote:
> The "root" folder of a system is the very first folder of that system.
> It is the folder in Linux that folder is "/". In Windows it would be
> "C:/" or "D:/" etc.

Leaving aside the question as to whether Windows has such a thing as a
root folder (since it doesn't have a unified file system it's not a
concept that really means much), the root folder of a mail hierarchy has
nothing to do with any of this, especially if we're talking about an
abstraction maintained by a remote server, e.g. I use Gmail via IMAP,
but I don't for a moment think that my "root folder" corresponds to a
real file directory, given that Gmail is a huge distributed database.

Mail folder collections almost always look like rooted trees, at least
in abstract. Sometimes the root is anonymous, other times it has a name,
such as the Inbox supported by the original Cyrus system.

poc