Add/Remove/Manage Email Accounts

Login to your Hosting Control Panel, go to Mail > Add/Remove/Manage Accounts > Add Account > set quota to 100.
An email account is an account that is stored on your server. It enables you to reply from email@yourdomain.com

Add/Remove/Manage Email Forwarders

Login to your Hosting Control Panel, go to Mail > Forwarders > Add Forwarder
Email Forwarders: The email is not stored on your server but forwarded to another email address you already have.