The phrase “whitelist” describes a list of authorized and verified people, organizations, software programs, or even bitcoin addresses. Whitelists typically pertain to a specific product, occasion, or piece of data. Whitelists can thus convey many connotations depending on the context in which they are employed.
For instance, when users sign up for a company’s mailing list, they are frequently prompted to add the company’s email address to their whitelist in order to prevent the messages from going straight to the users’ spam boxes. To avoid having their emails automatically classified as spam, businesses may occasionally pay fees to have their emails included to Internet service providers’ whitelists. Users can ensure that future emails will arrive in their inbox by adding an email address to their whitelist.