I am assuming the xxxxxxxxxx.com is your business domain name.
If you don't already own the domain name, you will need to purchase it.
Then, you can sign up with an email host which will allow you to create a email@example.com
You may want to check out Rackspace, as a place to start - http://www.rackspace.com/email-hosting/webmail/
Prices start at $2 / month for email. You'll probably pay around $10-$20/year for the domain name.