How do I set up an e-mail account through Hostgator that uses my domain?

Not sure if this is the best section for this question, but I could not find another one that worked any better. I am sure this is easy to do, but for whatever reason, I am not getting it. I use Hostgator for my hosting, and want to set up an e-mail account that uses my domain in it, i.e. . I would prefer to send the messages from my main Yahoo or Gmail account if possible. How do I go about doing this?

 

Here's a video tutorial about setting up an email account with your HostGator account. http://www.hostgator.com/tutorials/cpanel/hgx3/creating-an-email-account.htm

 

Thank you for the recommendation, but I do know how to do that part. I guess my main question is this: Is there a way to use Gmail or Yahoo e-mail to send out mail using my domain for the e-mail address, or do I have to use Outlook, Thunderbird, etc.?

 

Gmail setup steps: http://mail.google.com/support/bin/answer.py?hl=en&ctx=mail&answer=22370