Mail Art as an art form which is democratic, spontaneous and reacts to current affairs was developed in the 1960s – it was first practised in the USA and then came to Europe shortly after. Mail Art does not mean the personal correspondence between two people, but rather using art to communicate to concrete, advertised projects. The motto: no fee, no Jury, no return puts no restraints on the content or the form of expression. The Mail Art network enabled the worldwide exchange of thoughts and of art, for both artists and amateurs. Special mediums of expression developed through Mail Art, such as rubber-stamp art, artistamps, shaped envelopes, postcards, posters and assemblings. Significant portions of the Schwerin Mail Art Archive are made up of a collection of Berlin artists and Mail Artist Joseph W. Huber, who was active in the Mail Art network from the early 1970s.