Test, test, and test again! Make sure your email looks good on all devices before you send it out. We’re very font of you because you’re our type. Get creative with emojis in email subject lines to increase open rates! Sit up straight. Boost your email opens with a punchy subject line. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Fighting off robots… Don’t forget to add a short preview description to encourage people to click on your email.