dsync: INBOX Can't be deleted

[Timo Sirainen]

On 23 Jan 2016, at 11:30, Christoph Adomeit <Christoph.Adomeit at gatworks.de> wrote:
> 
> Hi,
> 
> I am Migrating an old cyrus mailserver to dovecot.
> 
> in the old cyrus Mailserver all User Mailboxes are
> sub-mailboxes of their INBOX.
> 
> I have to preserve that structure.
> 
> During Migration with dsync I get these Errors:
> 
> Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted
> 
> Is there a way to work around these Errors ?

With "doveadm backup" you have gotten into such a state that the INBOX needs to be deleted and recreated to preserve it exactly as it's in source. But you're using Maildir format, which doesn't allow deleting INBOX. So possibilities:

a) Don't use Maildir format

b) Delete the entire Maildir manually with rm -rf and the next doveadm backup should work (if not then something strange is going on)