Postmark's email delivery service was used by Readability to launch their new product, a full-fledged "Readability" bookmarklet experience. The team at Readability found Postmark invaluable in simplifying their large-scale emailing needs, allowing them to focus on other aspects of their business. By integrating with Postmark, Readability is able to forget about common email-related issues such as delivery confidence, spam marking, and bounced emails, making the service a valuable investment for the company.