“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. Is anyone even reading this? Generating witty text... Fighting off robots… Keep your email subject line short and attention-grabbing. Sit up straight. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Try different email subject line styles to find what gets the most opens.