Not just a pretty interface Try different email subject line styles to find what gets the most opens. I wish I looked as good as you while waiting Don’t forget to add a fun, relevant call-to-action button to your email. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Let your imagination run wild. Fighting off robots… A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails.