Don’t forget to add a fun, relevant call-to-action button to your email. Boost your email opens with a punchy subject line. One Mississippi, two Mississippi… Fighting off robots… Try different email subject line styles to find what gets the most opens. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Sikuthanda kakhulu ngoba ungowohlobo lwethu. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails.