Thunderbird's not unsubscribing me from imap folders
I read all my e-mail via imap using Thunderbird (Icedove). I have
several folder hierachies in my personal account, some of which contains
mail put their by an exim filter as my .forward file on the server (the
mail is put into Maildirs in my account by exim). This Debian Mailing
list is one such folder
Another folder is spam, with subfolders containing "devnull" and
"teergrube" which contain messages put there are part of the spam
checking process (sa-exim).
This at least gives me an opportunity for a while (I have a cron job
which expires - ie deletes - the messages) to check if I think I might
have a false positive I am looking for.
However, although I have had this facility in place for a while,
Thunderbird seems to have suddenly found out about them - and when I ask
it to go to next unread message its jumping into these folders and
returning the messages. Since I get A LOT of these, its very inconvenient.
I am definitely NOT subscribed to the folder - and the properties on the
folder also say NOT to check for new e-mail.
I haven't been able to find how to tell Thunderbird not to put them in
my folder list and not to check for new mail. I tried subscribing and
unsubscribing. I even tried deleting the folders and re-creating them
on the server side.
Any ideas of how to proceed.