Emails cannot be set up for Trial websites. You'll need to have a published website in order to manage your email accounts. Creating an Email Alias is free.
An Email Alias is an email address which is forwarded to another email address. Emails sent to an Email Alias are not stored anywhere - they are only forwarded.
To create an Email Alias:
From your website dashboard go to the EMAIL ADMIN tab and click on NEW EMAIL ALIAS. Type in the email address you want and then type in the email addresses you would like emails to be forwarded to in the EMAIL DISTRIBUTION LIST box. Emails sent to this Alias email can be forwarded to more than one email account.