Preheat oven to 350 degrees F. and grease two 8-by-4-inch loaf pans or one large 9-by-5-inch loaf pan. Mix the flour, salt, baking powder, eggs, milk, oil, white sugar, poppy seeds and 1-1/2 teaspoons each vanilla, lemon and butter flavorings. Stir until just combined well, and pour batter into prepared pans.
Bake for 1 hour. Check for doneness, then cool for 5 minutes. Poke holes in the top of the bread with meat fork and pour glaze over top.
Glaze: Mix orange juice, confectioner’s sugar and the remaining 1/2 teaspoon each of the vanilla, butter and lemon flavorings. Pour immediately over warm loaf.