Distributed Sender Blackhole List

A Distributed Sender Blackhole List (DSBL) is a type of blacklist used in the realm of email filtering and anti-spam measures. It is designed to identify and track senders of unsolicited or harmful emails, such as spam. The concept of a blackhole list is to provide a resource that email servers can use to determine whether to accept, reject, or mark an email as spam based on the sender's reputation.