Creating a new email account for a domain name is done through StackCP.
Log in to StackCP and click ‘Manage Hosting’.
Select ‘Manage’ on the hosting package you wish to create an email account for.
Select ‘Email Accounts’ under ‘Email’.
Enter the name you want your email account to have and select the domain and click ‘Add Email Account’.
Your email account will automatically be assigned a password, but as soon as the account is created you’ll be able to change this to anything you wish.
You will have immediate access to your webmail account.