The Red Barn put together this clean, simple and perfect-for-mobile newsletter for Father's Day.
It has a great image to text ratio and a clear call to action.
However, their call to action is missed by the fact that it doesn't link to anything. They could improve their conversions by linking straight to the gift card purchase page or to their website.
So our tip for this month is remember to link your calls to action to a good landing page.