We replaced our inbox tests with Time to Inbox metrics on our status page, which provide more accurate and relevant data about Postmark's email delivery performance. Unlike seed tests that only run a few times a day and are specific to domain reputation and content, Time to Inbox tests run every five minutes and show the time it takes for emails to arrive in the inbox at major ISPs, including AOL, Outlook, Yahoo, Apple, and Gmail. This allows us to quickly identify issues and communicate them to customers, providing better transparency and peace of mind. We still use seed testing internally as a way to monitor overall delivery trends across multiple domains and providers.