Not just a pretty interface "I use PosterMyWall to create flyers for the MANY non-profit organizations that we are involved with!" - Stachia Don’t forget to add a fun, relevant call-to-action button to your email. Keep your email subject line short and attention-grabbing. Get creative with emojis in email subject lines to increase open rates! Fighting off robots… Boost your email opens with a punchy subject line. Let your imagination run wild.