Here are some common metrics for which thresholds are often set:
Open Rate: The percentage of recipients who open the email. Click-Through Rate (CTR): The percentage of recipients who click on a link within the email. Bounce Rate: The percentage of emails that could not be delivered to the recipient's inbox. Unsubscribe Rate: The percentage of recipients who opt out of the email list. Conversion Rate: The percentage of recipients who complete a desired action, like making a purchase.