My day’s been ok, how’s yours? I’m worth the wait One Mississippi, two Mississippi… Keep your email subject line short and attention-grabbing. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! "Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Try different email subject line styles to find what gets the most opens. Boost your email opens with a punchy subject line.