In 2009, I became an active mail artist. In some cases, I send artwork in response to a call for entries to organizations that display the received mail art in a gallery, school library, or a similar place, or I exchange pieces with individual mail artists.
Mail art links
Mail art projects
All kinds of mail art projects, with calls for entries.
IUOMA: the International Union of Mail Artists
A gathering place for mail artists, with information on getting started, interviews, and online archives of mail art.
"zines" at "chez-fleur" dot com