Making your users type their friends email addresses into your refer-a-friend form is a friction point that we're in business to help you with.
The first step is to get yourself a CloudSponge account and tell us the domain name of your website. Once you've done that, we'll issue you a Domain Key and Domain Password and everything else you need to know is right here in the developer documentation.
The CloudSponge Contact Importer can be installed on your website in two different ways...
Both options allow you to replace our branding with your own company name in addition to several other customization options.