While there is no direct way to measure deleted items, certain metrics can give you an idea:
Open Rate: A low open rate can indicate that your emails are not compelling enough to avoid being deleted. Click-Through Rate (CTR): A low CTR may suggest that even if opened, your emails are not engaging enough to prompt further action. Unsubscribe Rate: A high unsubscribe rate can be a sign that recipients are deleting your emails because they no longer find them useful.