Firewall SPAM killer
Where I work we run a FirstClass server for our email/conferencing
system. Our biggest problems as of late is that people are getting
more and more spam but the folks that produce FirstClass have done very
little (nothing is more like it) to add any sort of filtering to their
software. This is becoming a sensitive issue for us as we are a K-12
school system, and it only takes one bad email to little johnny to
cause quite a stir! Right now the FC server sits behind a linux
firewall (bridging, iptables, nice and transparent), so I was wondering
what my options were. I know I looked into using a kind of forwarding
setup a while back, that is the mail get delivered to a host filtered,
then forwarded on, but I was curious if there was any sort of "proxy"
style spam filtering software out there? Something like how I have
dansguardian/squid set up right now, it takes all the traffic from port
80 and redirects it to be filtered (transparent proxying). So I was
thinking some thing like that only in reverse (ie it's a connection
from out side the I would be redirecting).
How off the wall am here?