A “blacklist” is a list of phone numbers, URLs or other identifiers that are blocked or marked as undesirable.
Blacklists are used as a tool to manage and control unwanted or potentially harmful messages, such as spam, phishing attempts, or other forms of unsolicited communication. Maintaining an effective blacklist is a crucial aspect of managing messaging systems and protecting users from unwanted or harmful communications. It helps create a more secure and trustworthy messaging environment for both individuals and businesses.