Don’t forget to add a fun, relevant call-to-action button to your email. Boost your email opens with a punchy subject line. I wish I looked as good as you while waiting Get creative with emojis in email subject lines to increase open rates! Want the loading time to be longer so we can spend more time together :) One Mississippi, two Mississippi… I’m worth the wait 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!