Feel free to spin in your chair while you wait 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Don’t make ‘em yawn! Keep your emails exciting and brief. Try different email subject line styles to find what gets the most opens. "Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula We’re very font of you because you’re our type. Opening the door to unlimited creativity… Keep your email subject line short and attention-grabbing.