"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! 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! “There are so many beautiful designs to choose from. I feel like a professional when I use it.” - Dr. Oberson Keep your email subject line short and attention-grabbing. I’m worth the wait Let your imagination run wild. Boost your email opens with a punchy subject line.