Before you can use email with your domain, you must create a new email account in cPanel.
Step 1. Log into cPanel
Step 2. Once logged into cpanel, click on the "Email Accounts" located in the Mail section of cPanel:
Step 3. That will open a screen so you can create a new email address.
Step 4. Fill in the fields, below is a description of what to enter:
Email: This is the name of the account. This will be before the @ symbol in the email address.
Password: This is the password you assign to the email account.
Password (again): Re-type the password
Mailbox Quota: Select the size of the mailbox you want to create.
After entering your information in the fields, click the button labeled "Create Account"