14 Jul, 2004
Trying to prevent the denial of service and spam attacks that I was getting, I looked into setting up some real time black lists for Postfix. I tried relays.ordb.org and xbl.spamhaus.org.
ORDB.org is a black list that only lists verified open relays.
The Spamhaus Project has two black lists
- xbl.spamhaus.org lists machines that have illegal 3rd party exploits, like proxies, worms and trojan exploits.
- sbl.spamhaus.org lists machines that have been verified UBE sources
I ended up not using xbl.spamhaus.org, since it didn't seem to be catching the zombie machines that were sending email to me. Also in some ways, I don't want to block spam, since I want my Bayesian filters to be as accurate as possible, so I want to scan all of the spam that I am sent.
