There is an ongoing debate among some artists as to just what the relationship of e-mail art to mail art should be considered to be. In addition to questions about whether this is even a valid or meaningful genre of art, as clearly almost any kind of digital-based art can be e-mailed, thus making it into "e-mail art," has been particular criticism of e-mail art by tradition-minded mail artists when the e-mail art has been perceived to be akin to mass media. Other criticisms of e-mail art from a mail artist's perspective have focused on the lack of dimensionality of the attachment, the lack of intimacy as opposed to real mail .
Some artists have also collaborated by sending e-mail attachments back and forth, a process known as Photoshop Tennis; the surrealist game of exquisite corpse has also been adapted to e-mail. (These have been paralled by collective musical compositions done by e-mail.)
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