One Mississippi, two Mississippi… Sit up straight. "I use PosterMyWall to create flyers for the MANY non-profit organizations that we are involved with!" - Stachia Don’t forget to add a fun, relevant call-to-action button to your email. Opening the door to unlimited creativity… Keep an eye on your email open rate to analyze and improve performance! "Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Boost your email opens with a punchy subject line.