Julian Assange along with John Young and some 1400 others were on the Cypherpunks mail list
(crypto, politics) from late in 1995 to 2002 (and beyond, Young is among few still on the now very quiet list).
Below are Julian's messages from 1995-98 to 2001-02.

http://cryptome.org/0001/assange-cpunks.htm#2002