Do not reply to this scammer.  He isn’t a philanthropist and he doesn’t represent Koch Industries, he isn’t even called Mr Koch.

He certainly doesn’t want to give $1m to random people he knows nothing about.  He does however want to take money from random people and will happily take your money for as long as you are prepared to send it to him.  Ignore him.

Hi, My name is David Hamilton Koch, a philanthropist and the founder of Koch Industries, one of the largest private foundations in the world. I believe strongly in ‘giving while living I had one idea that never changed in my mind, that you should use your wealth to help people and I have decided to secretly give US$1,000,000.00 Million Dollars to randomly selected individuals worldwide.

On receipt of this email, you should count yourself as the lucky individual. Your email address was chosen online while searching at random. Kindly get back to me at your earliest convenience, so that I will know your email address is valid.

David Hamilton Koch