Not just a pretty interface 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! Test, test, and test again! Make sure your email looks good on all devices before you send it out. Opening the door to unlimited creativity… Fighting off robots… Don’t make ‘em yawn! Keep your emails exciting and brief. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails.