Get creative with emojis in email subject lines to increase open rates! Fighting off robots… 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 fun, relevant call-to-action button to your email. Not just a pretty interface Boost your email opens with a punchy subject line. Don’t forget to add a short preview description to encourage people to click on your email. Keep your email subject line short and attention-grabbing.