It probably is a scam email. I really haven't seen a legit typing job yet (there is some out there however). If it is requiring you to go to an office and it is a desk job, this is a totally different story; if this is the case it should be legit because you will basically be a secretary. Don't trust emails you receive because most of them are just scams and some contain viruses

, but there are a FEW that are legit.
Here is a hint on spotting scams. If they require you to put a payment on something to get a list of jobs or something else promising you "x" amount of money, it is most likely a scam.