How can I change email account quota from hosting control panel?

Control Panel V5 > Hosting Control Panel > Emails
If you want to allocate more space for your postmaster email account or other email accounts, you can follow the steps below to change it from your hosting control panel.
1. Login to your hosting control panel
2. Click on "EMAILS" >> "Emails" >> click on " ... ".
3. Click on "Update Disk Quota".
4. Fill the size that you want to allocate and then click on "Submit".