Sit up straight. "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! Don’t make ‘em yawn! Keep your emails exciting and brief. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! My day’s been ok, how’s yours? Want the loading time to be longer so we can spend more time together :) Keep your email subject line short and attention-grabbing.