Mail art, also known as postal art or correspondence art, is a global artistic movement in which people create and exchange art through the postal system. This can take many forms, including handmade postcards, decorated envelopes, artist stamps, or small works of art sent directly to recipients. Rooted in creativity, community, and activism, correspondence art emphasizes personal expression, connection, and the idea of sharing art outside of the traditional gallery systems. Below are examples of recent correspondence art I have sent and received under the name Red Letter Day.