In a world of increasing SPAM, IP reputation has become a must-know statistic if you want to be able to send an email to a customer, prospect or even grandma. So if you are running an ISP, as we are, maintaining a good IP reputation isn’t some nice frill that makes you feel good, it’s a necessity. The problem is, no one wants to tell you what the reputation is. Sure, you can monitor the hundreds of various block lists out there, and probably should, but that only tells you when the IP’s reputation has reached a critical low. Luckily, most big email providers are turning to ReturnPath their spam complaints, feedback loops, and all those other tedious tasks that need handling when dealing with customer level email delivery. This places ReturnPath in a unique position where they can monitor, generate, and, more importantly, display the IP reputations of our IPs.