Postmark is the email delivery service that people actually like. Stop worrying if your emails made it to the inbox, and get back to focusing on what matters—building great products. Start sending in minutes: With API libraries for pretty much every programming language you can think of, Postmark fits seamlessly into any stack. Stellar deliverability (without paying for a dedicated IP): You might say that Postmark has serious street cred with inbox providers. That's because we vet every new sender carefully, help you follow deliverability best practices, and never, ever let spammers use Postmark. Promotional and transactional emails never mix: Our API and SMTP service help you send your emails with ease, whether that's password reset emails, notifications, newsletters, or anything in between. To protect the deliverability of your crucial transactional emails—and make sure they arrive lightning fast—we route promotional messages like newsletters through a parallel but separate sending infrastructure.