How can I get my jealous cousin to stop sending me emails calling my fiancee a mail order bride?

He is my vietnamese cousin who's older than me and he lives in the states and he is bitter because his parents didn't find him a girl in vietnam like my parents did so he had to result in marrying an american girl. His parents would always tell him I'm going to find you a girl in vietnam for you to marry but they never really picked a girl for him. The american divorced him about 7 years ago, they were only married for 6 years before his wife cheated on him. He is jealous because my parents are picking a girl for me and my parents told me all I have to worry about is finishing college. He sended me emails calling my fiancee to be an mail order bride and called me a barbaric inhuman pig. Is there anyway to stop him ?? I am tired of him and everyone who is dissing me.