Posted by: Anonymous
[ip: 75.36.243.37]
on December 20, 2008 12:46 AM
RBL METHODOLOGY
Spamhaus’ zen list is composed of 3 main blocklists: XBL, SBL and PBL.
XBL is done manually and Spamhaus clearly describes their methodology for it. But it only filters a very small percentage of their spam, maybe around 3%.
Spamhaus’ SBL list blocks the majority of their spam and their posted methodology for it only says that it is a combination of CBL and NJABL – the actual methodology is not published.
Don’t blame either company for not clearly posting their methods so spammers know how better to get past them them - it's tough enough as it is!
FALSE POSITIVES
I have heard positive feedback on Barracuda’s low false positive rate directly from some IT admins that have tried it out.
But IT admin’s should take outside feedback (positive or negative) with a grain of salt and test it out for their own system. And unlike a commercial product they don’t have to buy it first!
Robin absolutely did an apples to apples comparison. We need to know what our choices are – healthy ‘competition’ keeps all the organizations/companies offering RBL’s motivated to keep improving their results.
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Re: Apple, meet orange
Posted by: Anonymous [ip: 75.36.243.37] on December 20, 2008 12:46 AMSpamhaus’ zen list is composed of 3 main blocklists: XBL, SBL and PBL.
XBL is done manually and Spamhaus clearly describes their methodology for it. But it only filters a very small percentage of their spam, maybe around 3%.
Spamhaus’ SBL list blocks the majority of their spam and their posted methodology for it only says that it is a combination of CBL and NJABL – the actual methodology is not published.
Don’t blame either company for not clearly posting their methods so spammers know how better to get past them them - it's tough enough as it is!
FALSE POSITIVES
I have heard positive feedback on Barracuda’s low false positive rate directly from some IT admins that have tried it out.
But IT admin’s should take outside feedback (positive or negative) with a grain of salt and test it out for their own system. And unlike a commercial product they don’t have to buy it first!
Robin absolutely did an apples to apples comparison. We need to know what our choices are – healthy ‘competition’ keeps all the organizations/companies offering RBL’s motivated to keep improving their results.
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