Email Issues

since signing up here.. which I don't regret doing.. my spam folder is getting decimated with spam.. I've had this email account since 2006 sooo I'm pretty used to the amount of junk I had usually received ;-) is there a general unsubscribe I can do from.. promotional & partner emails ?
if I change my email address.. will the rampant spam stop to the previous address ?

Or is it already too late now :-P