1. In a large mixing bowl, combine the rye flour, all-purpose flour, and salt.
2. Dissolve the yeast in warm water and add molasses. Let it sit for 5 minutes.
3. Add the yeast mixture to the flour mixture and mix until a dough forms.
4. Knead the dough on a floured surface for about 10 minutes.
5. Place the dough in a greased bowl, cover, and let it rise for 1 hour.
6. Preheat your oven to 375°F (190°C).
7. Punch down the dough, shape it into a loaf, and place it in a greased loaf pan.
8. Bake for 45 minutes or until the bread sounds hollow when tapped.
9. Let the bread cool on a wire rack before slicing.