The Aliases section allows you to add/remove aliases @ any domain listed under your account to another address. When mail is sent to the alias address, it will be automatically (and silently) redirected to the “destination address”.
You can create as many aliases under your account as you like, but aliases are a one to one relationship- a alias address can only go to one destination address. See the E-Mail Exploders section to create “one to many” e-mail aliases.