Whitelist is an option that allows the classification of users (Whitelist - desirable and Blacklist - undesirable). In other words, it’s a list of trusted sources that can interact with the organization’s systems, while some other sources are blocked or restricted. A business might create a Whitelist of numbers from trusted partners or clients that are allowed to bypass the spam filter and their calls will be delivered directly to employees. A Whitelist is a security measure used to prevent unauthorized access to an organization’s workers, network, or systems. Companies can reduce the risk of cyberattacks and data breaches by allowing approved contacts to have positive priority.