Run Tokens Make Email CI Less Fragile

The article highlights a common issue in email automation where tests work locally but fail unpredictably in continuous integration (CI) environments. The root cause is selecting "the latest email" rather than verifying it's linked to the current run. This problem is significant because it can lead to flaky tests, regardless of whether disposable email addresses, shared staging inboxes, or specialized mail helpers are used. The solution involves using run tokens to ensure emails are tied to specific runs, which could greatly improve the reliability of CI processes.