Isn't this what happened so someone before?
Edit: How odd, it's listed on here: http://thales.memphis.edu/mw/data.bak (the only reference I can find to that file is http://marc.info/?l=log&m=100334499223652&w=3)...
It's a mail server it seems, whois turns up mail.hakkrems.ac.at (Vienna University Computer Center).
http://mail.hakkrems.ac.at/ is up on port 80, according to the favicon it's linux based.
Edit2: Previous instance of this issue: http://forums.hak5.org/index.php/topic,7683.0.html
Edit3: Apache/2.0.53 (Linux/SUSE), apparently.