One Mississippi, two Mississippi… Keep an eye on your email open rate to analyze and improve performance! "I use PosterMyWall to create flyers for the MANY non-profit organizations that we are involved with!" - Stachia Keep your email subject line short and attention-grabbing. Boost your email opens with a punchy subject line. Is anyone even reading this? Generating witty text... Don’t forget to add a fun, relevant call-to-action button to your email.