[Dovecot] automatic un-subscribe ?

[Per Jessen]

Is there a way for an unsubscribe from a previously (auto-)subscribed
folder?  I'm building an email archiving system, and archived mails are
organized by annum.  A user will have e.g. 3 years of archive
available.  Currently that would mean this user would be
auto-subscribed to private folders named 2007, 2008, 2009 and current. 
Starting January 2011 though that would change to 2008, 2009, 2010 and
current.  Is there a way of auto-unsubscribing 2007 ?


/Per Jessen, Zürich