Sorry but its a waste of time. He won't reply to fanmail and even in person a lot of the time he will just ignore you. He's a tough one to get!

Bill Murray is one of my favorite comedians of all time . I
would like to send him a request . I never see success from
him but if there are any addresses for him I will try them .I
really am a fan of his movie "Ground Hog Day " I have tried
the address in the database but never saw my request again
it has been like 3 years.