Details:
To set up a domain alias:
1 On your Home page, click the domain name for which you wish to set up
additional domain names.
2 Click the Domain Aliases icon from the Web Site group.
3 Click the Add Domain Alias icon.
4 Type the desired domain alias name, for example alias.com.
Domain aliases can comprise letters, digits and hyphens. Each part of the
domain alias between dots should not be longer than 63 symbols.
5 Select the Synchronize DNS zone with the primary domain check box if you want
the domain alias to use the same DNS zone resource records as in primary
domain. With this setting, any subsequent changes in resource records of the
primary domain's zone will be applied to the DNS zone of this domain alias.
6 Select the Mail check box, if you want e-mail directed at the e-mail addresses
under the domain alias to be redirected to the e-mail addresses under your
original domain name.
Example: You have an e-mail address mail@yourdomain.com. You have set up
an alias for your domain name, for example, alias.com. If you want to receive mail
to your mailbox mail@yourdomain.com when it is sent to mail@alias.com, select
the Mail check box.
7 Select the Web check box. Otherwise, the web server will not serve the web
content to users coming to your site by typing the domain alias in their browsers.
8 Select the Java Web applications check box if you have Java applications
installed on your site and you want them to be accessible through the domain
alias.
9 Click OK.