[Dovecot] case (non-)sensitivity for folder names

[Phil Howard]

Is IMAP supposed to be case sensitive or case in-sensitive?  It seemed
it would be case sensitive because I've had different cases of
folders.  But today I found I had two folders "Spam" and "spam", with
directories ".INBOX.Spam" and ".INBOX.spam" on the server.  Messages
existed in each directory on the server and they were different.  The
messages could be read from Evolution.  However, the list of messages
had info mixed up between the folders.  I then selected all messages
in one of the folders and trashed them (click on trash icon).
Messages disappeared in BOTH folders.  On the server, after a couple
minutes delay, messages in BOTH directories were flagged "T".  That
doesn't seem right.  But I don't know enough about what IMAP is
supposed to do, or on which end the names of folders get remapped into
directory names, to even guess which is messed up here.  I do know
Evolution keeps a track of what it thinks the folder has, because in
the past I have just "rm -fr" on a folder directory and Evolution
still showed each message in its list, although it could not access
them.

Anyone know what's the deal with that?

Unfortunately, there seems to be no operation in Evolution to tell it
to discard its own cache.

I'm also wondering if life would be any better if I used Thunderbird.

-- 
sHiFt HaPpEnS!