Preheat the oven to 350°F (175°C).

In a large bowl, whisk together the all-purpose flour, baking powder, baking soda, salt, and poppy seeds.

In another bowl, cream together the softened butter and granulated sugar until light and fluffy.

Beat in the eggs one at a time, then stir in the milk, lemon juice, and lemon zest.

Gradually mix the dry ingredients into the wet ingredients until just combined.

Pour the batter into a greased loaf pan.

Bake in the preheated oven for 50 minutes, or until a toothpick inserted into the center comes out clean.

Allow to cool in the pan for a few minutes, then transfer to a wire rack to cool completely.