Email Setup Help?

Im asking for help in doing this. I use host gator and have one of my sites..... mybusiness.com..

I setup an email .... [email protected] that gets forwarded to my personal email that is associated with my host gator account.

I need to be able to send emails to clients from mybusiness.com.....
so the recipient won't see my personal email address "from sender" but see my business address instead.

I don't have an email client... only gmail and yahoo for personal use.

I just know know much about email stuff... Thanks