"Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Get creative with emojis in email subject lines to increase open rates! Let your imagination run wild. Don’t forget to add a fun, relevant call-to-action button to your email. [insert fun loading text here] A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Generating witty text... Don’t forget to add a short preview description to encourage people to click on your email.