Open tracking has finally been launched by Postmark, marking a combined effort of months of work from its team. The feature is tailored to transactional email workflows, allowing users to track various data points such as opens by individual, tag, geographic location, and device information. With open tracking enabled, users can view detailed statistics and actions on specific messages or campaigns, including individual user-level data. The API has been updated with new endpoints for tracking opens, viewing statistics across dates and tags, and searching opens based on various criteria. Additionally, webhooks have been introduced to push data to users in real-time when an open occurs, expanding the feature's utility and flexibility.