Understanding why your emails never reach the inbox can be daunting, confusing and stressful. Return Path makes it easy with Sender Score. Sender Score is similar to a credit score, but for your IP Address. It lets Internet Service Providers know how trustworthy your emails are and lets marketers know exactly which reputation metrics are causing their emails to be sent to the spam folder or blocked. Our Sender Score infographic shows the path to the inbox and the reputation perils at play.