How to make e-mail using your own domain

sometimes we often make the e-mail with a domain that it was just, for example, we want to make sure the email we will use domain@yahoo.com, @ gmail, or others. This time I will tell you how to create e-mail by using their own domain.

way is >>>>>>
http://www.google.com/a/cpanel/domain/new

then follow the next steps ... >>>