WP Mail Logging is the most popular plugin to log emails sent by WordPress or WooCommerce. Simply activate it and it will work immediately, no configuration necessary.

WHY LOG EMAILS SENT FROM WORDPRESS OR WOOCOMMERCE?

Because it’s useful to know which emails your WordPress sends for debugging purposes or out of curiosity.

By default, WordPress and your web host do not log, store or keep track of emails sent from your website.

Download plugin from wordpress directory