I created a client and added his mail accounts as admin. I manually set limits. Then when I login as this client and try to set an email password, quota text field turn to from 2048 MB to -28672 and got a warning says; The max space for mailboxes is reached. The max. available space in MB is: -28672 Mailbox size must be a number. Invalid quota value. Allowed values are: 0 for unlimited or numbers > 1 But as I admin I can edit mailbox fine. This is openvz vm. Where is the issue?