Is anyone even reading this? Get creative with emojis in email subject lines to increase open rates! Sit up straight. Want the loading time to be longer so we can spend more time together :) 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Don’t forget to add a fun, relevant call-to-action button to your email. Keep your email subject line short and attention-grabbing. We’re very font of you because you’re our type.