System abuse drains time and revenue for hosting and cloud providers, who must maintain constant vigilance to make sure their systems are not compromised and ensure that their customers are vigilant. This document categorizes types of abuse, suggests appropriate responses and reviews practices for dealing with customers and complaints. It provides current best common practices in use with the hosting, DNS and domain registration provider communities.

This document gives an overview of the current best common practices for sending commercial electronic messaging, focusing on the technical and practical policy aspects of these operations. The goal of these practices is to promote and enhance the transparency of senders maintaining legitimate messaging so that both individual recipients and mailbox providers are more easily able to distinguish legitimate messaging from messaging abuse.