"Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Keep your email subject line short and attention-grabbing. I wish I looked as good as you while waiting Test, test, and test again! Make sure your email looks good on all devices before you send it out. Not just a pretty interface Boost your email opens with a punchy subject line. Avoid getting marked as spam! Only email people who have agreed to receive emails from you. Don’t forget to add a fun, relevant call-to-action button to your email.