First Login to your cPanel by going to www.yourdomain.com/cpanel . then:
1 To access the Mail Menu, click on the icon above the word "Mail" on the main screen of your cPanel interface.
2 Click on the word Add/Remove Accounts to enter MAIL ACCOUNT MAINTENANCE.
3 Click on the word "Add Account".
4 Enter the name of the account, the account's password, and the account's quota (amount of disk space the account can use) in their respective blank fields.
5 Click on the button labelled create to create the account.