51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! [insert fun loading text here] Not just a pretty interface 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. Get creative with emojis in email subject lines to increase open rates! Avoid getting marked as spam! Only email people who have agreed to receive emails from you.