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! Keep your email subject line short and attention-grabbing. We’re very font of you because you’re our type. Don’t make ‘em yawn! Keep your emails exciting and brief. Boost your email opens with a punchy subject line. One Mississippi, two Mississippi… Sit up straight.