A user alias represents a forward to an actual email account. The sole purpose of a user alias is to forward email to other accounts. Aliases may not send mail, and may not log into the web
As a domain administrator, you can manage email aliases from the Email Aliases page in the Settings menu.
To begin adding a user alias, click on Add Alias from the Email Aliases page. After you fill out the fields on the page, click on Save to finish adding the alias.
Alias Name - Enter the name of the alias.
Emails - Enter the full email addresses(one per line) of the users who should receive the mail sent to the alias.