Some of the key metrics that should be logged include:
Email Opens: The number of times an email was opened by recipients. Click-Through Rates (CTR): The number of times recipients clicked on links within the email. Bounce Rates: The percentage of emails that could not be delivered to recipients. Unsubscribes: The number of recipients who opted out of the email list. Spam Complaints: The number of recipients who marked the email as spam. Conversion Rates: The number of recipients who completed a desired action, such as making a purchase.