From the early 1960s, Relgis was in correspondence with figures in the Italian radical circles, such as the anarchist Gaspare Mancuso. In 1964, Mancuso and Regis' other Italian disciples founded the political journal "Quaderini degli amici di Eugen Relgis" ("The Friends of Eugen Relgis Notebooks"). He also became an occasional contributor to "Mujeres Libres", the Spanish anarcha-feminist tribune in the United Kingdom. During the 1960s and '70s, as a spell of liberalization occurred in Nicolae Ceaușescu's Romania, Relgis was again in contact with Romanian intellectuals. Before the massive earthquake of 1977 devastated Bucharest, he was in regular correspondence with scholar Mircea Handoca.