In a large bowl, combine the flour, baking powder, sugar, salt, milk, butter, eggs, poppy seeds, and lemon juice. Beat at medium speed until well mixed, about 2 to 3 minutes. Pour the batter into a greased 12-cup Bundt pan and bake 40 minutes in a preheated 350 degree oven. Cool in the pan 10 minutes, then remove the bread to a serving plate, pour the glaze over the warm bread, and let cool completely.
In a small bowl, stir together glaze ingredients.