1. In a large mixing bowl, combine the rye flour, all-purpose flour, caraway seeds, and salt.
2. Dissolve the molasses in warm water, then add the yeast and let it sit for 5 minutes until foamy.
3. Pour the yeast mixture into the dry ingredients and mix until a dough forms.
4. Knead the dough on a floured surface for about 10 minutes until smooth and elastic.
5. Place the dough in a greased bowl, cover, and let it rise in a warm place for about 1 hour or until doubled in size.
6. Preheat the oven to 375°F (190°C).
7. Punch down the dough, shape it into a loaf, and place it on a baking sheet.
8. Bake for 30 minutes or until the bread sounds hollow when tapped.
9. Let the bread cool on a wire rack before slicing.