How to Modify the Quota of a Mailbox

To change the amount of storage space allocated to a mailbox, follow these steps:

1. Log in to webmail e.g. https://webmail.yourdomain.com with an administrator account.
2. On the top menu bar, click More to expand the drop-down menu, then click Domain Settings.



3. Click on the mailbox name you want to modify.



4. Change the Mailbox Size Limit (1) field to the new quota for the mailbox. Then click Save (2).