Try different email subject line styles to find what gets the most opens. Feel free to spin in your chair while you wait My day’s been ok, how’s yours? A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Fighting off robots… 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Let your imagination run wild. Boost your email opens with a punchy subject line.