Re: [Dovecot] create Sub-Subfolders

when a user tries to create a sub-subfolder in Archiv, he gets the message:

"Mailbox doesn't allow inferior mailboxes"

is there a spezial configuration in /etc/dovecot.conf needed?

From memory I believe it depends on the format of the mailboxes. If you're using Maildir format then you can create sub-folders, but if you're using mbox you can't. It's possible to convert mailboxes from mbox to Maildir, but if you have a lot of users with a lot of mail then this could be a big task. Also, remember that if you do change format you also need to modify Postfix (assuming you're using Postfix) to deliver to that format.