Feel free to spin in your chair while you wait 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Join 4 million members in making awesome marketing content. Want the loading time to be longer so we can spend more time together :) Keep your email subject line short and attention-grabbing. Opening the door to unlimited creativity… Test, test, and test again! Make sure your email looks good on all devices before you send it out. Don’t forget to add a short preview description to encourage people to click on your email.