Fighting off robots… Try different email subject line styles to find what gets the most opens. We’re very font of you because you’re our type. Keep your email subject line short and attention-grabbing. Don’t forget to add a fun, relevant call-to-action button to your email. Sit up straight. Avoid getting marked as spam! Only email people who have agreed to receive emails from you. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails.