Mail art as well as fluxus is a very self-conscious art movement. There is the rubberstamps with proclamations like H.R. Fricker’s “Mail art is not fine art” and “After Mail Art” stamps, and there are various kinds of lists and manifests like these ten commandments from Mogens Otto Nielsen (left picture). These expressions play on ads and political statements, but it is also a way to identify and distinguish mail art from the traditional or mainstream art movements.