Get creative with emojis in email subject lines to increase open rates! Try different email subject line styles to find what gets the most opens. I wish I looked as good as you while waiting Opening the door to unlimited creativity… 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! Boost your email opens with a punchy subject line. Keep your email subject line short and attention-grabbing.