Vote by Mail Act of 2019 This bill requires states to allow voting in federal elections to be by mail without additional conditions or requirements, except a deadline for returning the ballot. States must mail ballots to individuals registered to vote in a federal election not later than two weeks before the election. The U.S. Postal Service must carry ballots mailed by a state expeditiously and free of postage. This bill authorizes automatic voter registration of individuals through state motor vehicle authorities.