Sift together first 3 ingredients into a large bowl.
Stir together milk, eggs, and vanilla; add to dry ingredients, stirring just until moistened. Stir in raisins. Spoon batter evenly into 3 greased and floured 9- x 5-inch loafpans. Bake at 350° for 55 to 60 minutes or until golden. Remove from pans; brush loaves with melted butter.