I found that when the mailbox name contains special characters such as \x7f, when the doveadm quota recalc -u xxx command is executed, the messages under the mailbox name with special characters will not be counted. doveadm mailbox list -u xxx Actual mailbox name: doveadm quota recalc -u xxx, Mail under 'INBOX.Metaltex' will not be counted. hfh at cndns.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20200715/22999bd9/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: Catch10C8.jpg Type: image/jpeg Size: 112232 bytes Desc: not available URL: <https://dovecot.org/pipermail/dovecot/attachments/20200715/22999bd9/attachment-0002.jpg> -------------- next part -------------- A non-text attachment was scrubbed... Name: Catch.jpg Type: image/jpeg Size: 386130 bytes Desc: not available URL: <https://dovecot.org/pipermail/dovecot/attachments/20200715/22999bd9/attachment-0003.jpg>