Get creative with emojis in email subject lines to increase open rates! Sit up straight. I’m worth the wait Keep your email subject line short and attention-grabbing. “I enjoy the creative experience of PosterMyWall. All the features are easy and great to use. You’ve made my job easier by far.” - Angel C. 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. Boost your email opens with a punchy subject line.