Email Verifier Ver 2 on Social Networks

I need a scraper or software built, which take email address from Access or SQL Server database and check against major social network ( no facebook ) , if present go back to database and flag as verified. Must be super-fast, speed is key. proxy capabilities. I am looking to run large list. I am open to any ideas you may have which can add more value to this efforts, such as if you can get profile list or any other data will be good.