Yes, Magento 2 SMTP Email Extension can track failed email attempts when it includes logging and error reporting features. Many extensions record the status of each message, so store owners can see which emails were sent and which ones failed. This helps teams find issues related to server settings, wrong addresses, or blocked emails. In many cases, the Magento 2 SMTP Email Extension also shows error codes that explain the cause. Store owners can review these logs, fix the problem, and test again to keep email communication stable.