[NTLUG:Discuss] Postfix Spam Blocking

[Paul Ingendorf]

I'm looking for some pointers here.  I am currently running a postfix setup
with spam assassin.  I have run into the problem of recieving more than
900MB of spam a month.  This has gotten to the point where is just peeves me
off.  I have examined a few options but I'm left with a simple ip blacklist
as being the best way to deal with the problem.  So here is my question what
is the best way to impliment something like this and are there any
apps/scripts available that will parse my current collection of spam
messages to add only the ips from where the spam originated or will I have
to go through and dig those out for each mesage myself.  I'm looking into a
rbl for blocking known bad ips but I want to catch as many as possible from
past spam as well.