THREAT INTEL: What is a DNSBL? A Domain Name System Blacklist ‘helps’ to fight email spammers.

Gibraltar: Thursday 27 June  2024 at 11:50 CET

THREAT INTEL: What is a DNSBL? – A DNSBL or A DNSBL or Domain Name System Blacklist is a part of a system that ‘helps’ to fight email spammers.

By Andy Jenkinson – Guest Contributor |  Group CEO Cybersec Innovation Partners
via IainFRASER.net/CYBERInsights
First for SME Cybersecurity News
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A DNSBL or Domain Name System Blacklist is a part of a system that ‘helps’ to fight email spammers. There are a lot of such lists in existence, each of them containing a list of IP addresses known to send spam.

DNS blacklists are used by email services and website admins to effectively keep spam out of their clients’ inboxes. Think of such lists as bouncers, but instead of having a list of people to let in, they contain lists of people to keep out.

Despite its name, the term “list” is an oversimplification. These “blacklists” are not simply lists but rather security mechanisms that utilize various methods of checking whether or not a specific address or domain is listed, gets listed, or is removed from the list. These lists can also sometimes be referred to as “blocklists”.