To create an email address for your domain name is easily accomplished within the cPanel control panel. Log in with your username and pasword.
Navigate to the Mail section inside cPanel. Click the Email Accounts icon. This will display the page where the email address can be setup:
1. Enter the email address you desire.
2. Enter a secure password & type it again.
3. Click the Create button.
Your email address has been setup. Now you need to access and send your emails.
See - Using Webmail and Setting up your email account in an email program