Hello,

I know maildir format does not allow to delete INBOX as stated in https://dovecot.org/list/dovecot/2016-January/102988.html. Nevertheless, even though I deleted the entire Maildir manually with rm -rf, doveadm backup fails with "Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted".

I would like to make a user's maildir backup to a different folder. For example:

rm -rf /tmp/zbbb/; doveadm backup -u [email protected] maildir:/tmp/zbbb/

But I keep receiving this error message: Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted

Do you know what might be causing this problem?

If I use sdbox instead of maildir, the backup works:

rm -rf /tmp/zbbb/; doveadm backup -u [email protected] sdbox:/tmp/zbbb/

However, I would like to use maildir format for the backup as all my mailboxes use this format.

Regards,

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