Global InformationDistributed Sender Blackhole List information
The Distributed Sender Blackhole List was a Domain Name System-based Blackhole List that listed IP addresses of insecure e-mail hosts. DSBL could be used by server administrators to tag or block e-mail messages that came from insecure servers, which is often spam.[1]
The DSBL published its lists as domain name system (DNS) zones that could be queried by anyone on the Internet.
DSBL is a dead RBL as of May 2008. Its administrators continued to run their authoritative nameservers for several months after their decommissioning announcement; as of March 9, 2009, even those servers are offline. At this point, using any *.dsbl.org lookups in an RBL check results in DNS failures and can even prevent an SMTP server from starting a conversation.
- ^ Smith, Curtis. Pro Open Source Mail: Building an Enterprise Mail Solution. United States, Apress, 2006. 278.