These are the domains that have earned a place in my killfile. I am getting a lot of
spam, and I really have better things to do with my time. Therefore all headers that
contain the following domain names will trigger a deletion of the mail. I really don't
care if psi.net is a big provider with thousands of clients - they do not take the spam
problem seriously and therefore I won't regard them as serious either. Some of the 
domains belong to real spammers but there are also "ordinary" sites that do not secure 
their STMP ports properly so spammers can relay traffic through them.

The major problem is the outdated STMP protocol. It does not require authorization from
people sending mail - all you need is a username which (usually) is ridiculously easy to obtain. 

** I have received spam from or through every single domain in this list ! **

tnlb.com
hpdc.com
metamall.com
wwwave.com
mail-response.com
iwc-online.com
cyberpromo.com
cfriends.com
dml.com
sungate.com
earthstar.com
mailloop.com
iemmc.org
worldwidepromo.com
thehitman.com
inmind.com
sallynet.com
glenfinnan.com
pc-express.com
motherboardx.com
fw.icx.com
t-1net.com
regulus.net
rapidconnect.com
spydee.net
roka.net
savoynet.com
c-flash.net
hudson.co.jp
Gsu.edu
iswt.com
u-net.net
tut.ac.jp
intrex.net
tamu.edu
psi.net
nethead.co.uk
microdata.fi
bizprom.com
gmds.com
estravel.ee
net-magic.net
interline.com.au
bright.net
earthlink.net
gin.net
ju.edu
cesnet.cz
nims.nec.co.jp
satlink.com
unixg.ubc.ca