example.com

Charles Miller: “A quick note for anyone writing documentation, or filling in default values in the configuration file for an application… The domains example.com, example.net and example.org are reserved for use in documentation. Thus, if you use bob@example.com in your default configuration file, you can be guaranteed that the address will never exist, and thus there will never be a “Bob” who is annoyed at your stupid choice of example domain names.”