dude it will be a fake cashiers check/ money order whatever they send will be fake. search the web for 100000000000000x of these scams.
when you deposit it youll get money from the bank alright, and then when the bank sends it to the clearing house and realizes its a fake. they'll take ALL the money back out of your account. and since youve fallen for the scam and sent that money back to whoever sent you the email
you now owe the bank tons of money.

do it if you want. but we warned you. and you'll be out $$$$$$$ and your car