In the control panel, under 'Email > Addresses', you have the option of setting up an Email Address and forwarding it elsewhere, or forward it to a POP3 mailbox.

By forwarding, we mean to redirect the mail that comes to your mail address, say bob@domain.com, to another address, say bobsmail@someisp.com.

By a POP3 mailbox, we mean storing the mail on our server so you can pick it up at a later time. Most people go for this option.

To set up Email forwarding, choose an address (ie: bob), or if you want (anything@yourdomain.com) then enter '@' as the address the Alias. Then click the Forwards to 'Email Address', and type in the email address you want the mail to go to (ie: bobsmail@someisp.com).

To set up an email address to go to a POP3 mailbox, choose an address (ie: bob), or if you want (anything@yourdomain.com) then enter '@' as the address the Alias. Then click the Forwards to 'Email Logins', and select the POP3 login name from the drop down menu.

You can find information on setting up a POP3 mailbox within the "How do I setup a POP3 account to forward my email to?" section of the knowledge base.