"Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. One Mississippi, two Mississippi… I’m worth the wait Don’t forget to add a fun, relevant call-to-action button to your email. Generating witty text... Keep your email subject line short and attention-grabbing. Avoid getting marked as spam! Only email people who have agreed to receive emails from you.