Tag Archive for: DNSBL

What is Domain Name System blacklist (DNSBL)?

Domain Name System blacklist (DNSBL) The Domain Name System blacklist (DNSBL) is a method used to identify and block spam emails by maintaining a database of blacklisted domains or IP addresses known for sending unsolicited or malicious content. The email server actively checks the DNSBL database upon receiving a message to verify if the sender’s domain […]