Generating witty text... 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! Boost your email opens with a punchy subject line. Test, test, and test again! Make sure your email looks good on all devices before you send it out. One Mississippi, two Mississippi… Keep your email subject line short and attention-grabbing. Avoid getting marked as spam! Only email people who have agreed to receive emails from you.