Politicians email addresses can be found at:

Australian Federal politicians' details & email addresses can be found at:

Parliament of Australia	http://www.aph.gov.au

House of Representatives	http://www.aph.gov.au/house/index.htm
Members of Parliament	http://www.aph.gov.au/house/members/index.htm
Specifically...
Email addresses	http://www.aph.gov.au/house/members/EMail.asp

Senate	http://www.aph.gov.au/senate/index.htm
Senators	http://www.aph.gov.au/senate/senators/index.htm
Specifically...
Email addresses	http://www.aph.gov.au/senate/senators/email.htm