Several metrics can help you gauge your email deliverability:
Delivery Rate: The percentage of emails that were successfully delivered to the recipient's email server. Bounce Rate: The percentage of emails that could not be delivered. Bounces can be hard (permanent failure) or soft (temporary failure). Open Rate: The percentage of delivered emails that were opened by recipients. Click-Through Rate: The percentage of recipients who clicked on one or more links in the email. Spam Complaint Rate: The percentage of recipients who marked the email as spam.