I ran into a site called Threatcrowd that is interesting too. It maps out domains/subdomains that perpetrate attacks and spam.
I came across it when researching a domain that fished an old email account I stubbornly held on to way too long. As a result of the fishing, I dumped it, swapped all my accounts over to new address and picked up a secure email provider for important communications.
https://www.threatcrowd.org/domain.php?domain=exacttarget.com
This domain was the source of the fishing attempt. Apparently a lof ot spam or fishing originates from here.