Opening the door to unlimited creativity… One Mississippi, two Mississippi… Not just a pretty interface Keep your email subject line short and attention-grabbing. Let your imagination run wild. Don’t forget to add a fun, relevant call-to-action button to your email. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Test, test, and test again! Make sure your email looks good on all devices before you send it out.