Don’t forget to add a fun, relevant call-to-action button to your email. Test, test, and test again! Make sure your email looks good on all devices before you send it out. Fighting off robots… Boost your email opens with a punchy subject line. We’re very font of you because you’re our type. Sit up straight. 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.