Overview
Postmark is a cloud-based email delivery service designed for developers and businesses. It provides a RESTful API and SMTP service for sending transactional and promotional emails. Postmark emphasizes deliverability by carefully vetting senders and separating transactional and promotional email streams to ensure optimal inbox placement. It offers detailed API documentation and libraries for various programming languages, including Ruby, Rails, .NET, PHP, Node.js, and Python, making integration into existing applications seamless. With features like webhooks for tracking email events, sandbox mode for testing, and email authentication guidance, Postmark enables users to manage domains, templates, retrieve stats, and process inbound email effectively. Postmark's infrastructure focuses on speed and reliability, ensuring emails are delivered quickly. The service has been used to deliver billions of emails for companies of all sizes.