Q. How do I set quotas on multi-hosted domains?

Ans. The quota can only be set for email accounts or the entire hosting account. With shared hosting, multi-hosted domains share the disk and bandwidth of the account as they are part of one account. If you wish to setup proper quotas for domains, you will need to upgrade to a Reseller HostingVPS Hosting or Dedicated Server Hosting, where you can create separate hosting accounts with their own quotas, and independent control panel.