Hello ,
To do this i will build a scrapper
it will automate the human search method using C# ,
Details of how it will be done :-
First you will have a form where you insert the email , then the program in behind will open FB,Twitter,linked in & klout which will be signed in by accounts you determine , next it will search by email address and if there's a result that matches this search it will appear if not it will appear no result , because some people hide there information like facebook you can hide finding by email address