Steps to create Email Accounts in your OVIPanel:
Step-1: Log in to your OVIPanel
Step-2: Go to Mail section
Step-3: Click on the Email Accounts
>>> Now in Create a new mailbox option you need to enter your Email Address, password and Quota (in MB) that is how much space you need to store your emails
>>> Now click on create.
So once after creating the email account for your particular domain, you can edit it and change its password and you can also edit its Quota and you can increase the storage size and you can even delete it.