Refer this site

Fill in your name and email, and your friend's name and email,
then click the "Send It" button. The message to be sent is shown below.

Name

E-mail

Your:

Friend:

The referral message that will be sent with this email is:

I found a website that I thought you would be interested in.
Check out Zshopster.com when you have a moment.

Have a nice day!