Email Log WordPress plugins saves a copy of every Email sent from your WordPress website. In order to achieve this, Email Log uses the 'wp_mail' hook to filter the 'wp_mail' arguments and stores them in a separate database table called 'email_log'.
Email Log WordPress plugin supports WordPress Multisites. In case of Multisite WordPress setup, the 'email_log' table is automatically created for each of the blogs you create. Similarly, when you delete a blog, the plugin automatically deletes the 'email_log' table associated with the respective blog.