Try different email subject line styles to find what gets the most opens. Don’t forget to add a fun, relevant call-to-action button to your email. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! We’re very font of you because you’re our type. Want the loading time to be longer so we can spend more time together :) Keep an eye on your email open rate to analyze and improve performance! Opening the door to unlimited creativity… Keep your email subject line short and attention-grabbing.