I was just checking some of my results on the RBL's and the spammers are
defintely getting smarter.
When I started using Declude in Feb 2004, Spamcop hit on 83% of all the spam
messages.
For June 2005, Spamcop hit on 48% of all spam messages.
Fiveten Spam dropped from 62% to 41% in the same time frame.
Two (newer) RBL's that seem to work:
1. uceprotect is nice because of it's accuracy:
dnsbl-1.uceprotect.net lists single IP addresses.>99.9% accurate here 32
to 35% of the total spam tagged.
dnsbl-2.uceprotect.net lists /24 subnets >99.8% accurate here. 33 to 38%
of the total spam tagged.
An IP address could be on both lists causing double-scoring. I use a filter
to prevent that myself.
2. mxrate has a higher number of total hits, but woth less accuracy.
pub.mxrate.net 98.9% accurate here. 59 to 62% of the total spam tagged.
3. If you are feeling advanced...
I've posted a program that take the ASSP Greylist and turns it into a ip4r
DNS that you can test against. You'll need some DNS knowledge as you'll need
to run this on your DNS Server.
Using this DNS, I find that ASSP score of >.99 tagsabout 13% of the total
spams at a >99.9% accuracy.
An ASSP score of .91 to .98 tags about 43% of the total spams at a >99.3%
accuracy.
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