If you already have at least one Virtual or Vanity Domain attached to your account, you may choose to "park" additional domains, so that it can be reached via several different domain names. Parked domains do not have their own unique IP addresses; instead, they use the IP address of an existing domain on your account. For this check our tutorial section. 

E.g.: mydomain.org and mydomain.net can be parked on the virtual domain name mydomain.com. You can manage e-mail delivery as normal for those domains, but they will always display the same Web site as mydomain.com