I did not set up my email through VodaHost. It is, and has always been, set up through SimpleInternet Site. If I go to VodaHost to delete it, will I be able to get the same email name when I do set one up at VodaHost?

I am very hesitant to delete it until I know that I can get the same name. Wouldn't it just be easier to fix my MX Records as SimpleInternet Site stated? This way I can get my email through them like I always have?