Timo Sirainen schrieb:

Or just from mdbox:~/mdbox to mdbox:~/mdbox:LAYOUT=maildir++

This doesn´t work:

Initialization failed: Namespace 'INBOX.': Mailbox list driver maildir++: maildir_name not supported by this driver

or without namespace:

Initialization failed: Initializing mail storage from mail_location setting failed: Mailbox list driver maildir++: maildir_name not supported by this driver