On 23 Sep 2015, at 18:10, Marcin Mirosław <mar...@mejor.pl> wrote: > > With dovecot-2.2.19.rc1 still have this error.
"doveadm backup" wants to delete and recreate a folder if there are some changes that can't be incrementally just added to it (mainly if IMAP UIDs would need to be inserted in the middle of the folder). Maildir doesn't allow INBOX to be deleted (because it's difficult), so this fails. Solution is to either not use Maildir format, or rm -rf Maildir manually before running dsync.
