Hi, the command? "doveadm? backup -u {user at mail} maildir:/home/backup/{user at mail}/mails/" returns the following error : dsync(user at mail): Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted. ...and nothing in dovecot logs ?dovecot actual version 2.3.15 I did not have this pb in dovecot 2.3.2 /Should this be considered a bug report?/ -- Pierre Sabl? Formateur & Administrateur Syst?mes Linux - DevOps Tel : 07.63.88.76.21 psable at dawan.fr www.dawan.fr -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20210713/8aaeee7e/attachment.html>