Why a local SMTP catcher is not an email integration test

Your Playwright test fills the signup form. The app sends the confirmation email. Mailpit shows the message with the right subject and link. The test passes. Then staging sends the same email to a real address and nothing arrives. The local catcher did its job. It proved the app opened an SMTP connection, built a MIME message, and rendered the... Weiterlesen: Why a local SMTP catcher is not an email integration test