A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Try different email subject line styles to find what gets the most opens. Boost your email opens with a punchy subject line. Is anyone even reading this? We’re very font of you because you’re our type. One Mississippi, two Mississippi… Keep your email subject line short and attention-grabbing. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!