On Mon, 2010-08-09 at 17:02 +0200, Richard Gliebe wrote: > when a user tries to create a sub-subfolder in Archiv, he gets the message: > > "Mailbox doesn't allow inferior mailboxes"
Like Phill said, the problem is mbox format. If you don't want to switch away from it, you can still create Archiv/stuff, if you just don't first create Archiv as a mailbox. In IMAP protocol terms you need to: Create Archiv/ directory to filesystem: 1 CREATE Archiv/ Create the mailbox file: 2 CREATE Archiv/child The 1 step is actually optional. In any case you can probably do both in the client UI as well by just adding the '/' manually.
