I have updated my ispconfig from 184.108.40.206 to 220.127.116.11 and later to 18.104.22.168p1 and squirrelmail from 1.4.20 to 1.4.22 Mail accounts created before works fine but when I create a new account and then enter to the webmail, I see this error trying to access to sent, drafts or trash folder: ERROR: Could not complete request. Query: SELECT "INBOX.Sent" Reason given: Mailbox does not exist, or must be subscribed to. Inbox works fine and it can send mails, but not save copy in sent folder. If I access the account folder from SSH I see that courierimapkeywords folder, courierimapacl and courierimapuiddb files are missing. What can I do?