A list which appears on the output of the lists command is called advertised. Open lists are advertised by default. Lists may be advertised only to some. For instance, lists may be set to appear only to lists requests within Duke University, or they may be set not to appear on requests from ".com" addresses. List owners who wish to change the degree of advertisement of their lists should write to
[email protected] and request it. See also: non-advertised.