What list email or email template report deliverability metric could indicate an unverified sending domain?

The list email or email template report deliverability metric that could indicate an unverified sending domain is hard bounces. Hard bounces are permanent delivery failures, such as invalid email addresses or blocked domains. Hard bounces can negatively affect the sender reputation and the email deliverability. One of the possible causes of hard bounces is an unverified sending domain, which means that the email domain used to send emails from Marketing Cloud Account Engagement is not authenticated and verified by Marketing Cloud Account Engagement. An unverified sending domain can result in the email servers rejecting the emails as spam or phishing attempts. To avoid hard bounces and improve email deliverability, the marketer should verify the sending domain in Marketing Cloud Account Engagement by following the steps in the reference link. Forward count, skimmed percentage, and total queued are not deliverability metrics that could indicate an unverified sending domain. Forward count measures how many recipients forwarded the email to another person. Skimmed percentage measures how many recipients opened the email for less than two seconds. Total queued measures how many emails were waiting to be sent from Marketing Cloud Account Engagement. These metrics are not related to the email domain verification or the email delivery failures. References Verify Your Sending Domain