Spamhaus and Barracuda Networks BRBL
johns at sstar.com
Thu Feb 18 20:38:26 CST 2010
> I have some objective data based on our testing here. Over the past 18
> months, Barracuda's block rate is 81.9%, while Spamhaus' is 83.3%. For
> whatever measurement error you want to include, that says that they are
> roughly equivalent. Over the past 6 months, BRBL is actually getting
> better: their block rate is 87%, while Spamhaus is 82%.
> There is, of course, a catch. BRBL gets a higher rate, but at a
> substantially higher false positive (FP) rate. We normalize FPs per
> 10,000 messages our measurements. Over the last 18 months, BRBL was 4.1
> FP/10K messages; Spamhaus 0.2 FP/10K messages. Again, BRBL is getting
> better: over the past 6 months, BRBL went down to 1.6 FP/10K messages,
> while Spamhaus is about the same at 0.3 FP/10K messages.
Your numbers reflect what I see, too. One other thing to note is that the two
services don't catch exactly the same spam, so using both results in better
trapping than either one alone.
John Souvestre - New Orleans LA
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