"I use PosterMyWall to create flyers for the MANY non-profit organizations that we are involved with!" - Stachia [insert fun loading text here] Not just a pretty interface Keep your email subject line short and attention-grabbing. Don’t forget to add a fun, relevant call-to-action button to your email. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Boost your email opens with a punchy subject line. Sit up straight.