[SURBL-Discuss] RFC: significantly reducing FPs on OB

Daryl C. W. O'Shea spamassassin at dostech.ca
Sat Jul 12 23:44:46 CEST 2008


On 12/07/2008 4:41 AM, Jeff Chan wrote:
> We can probably significantly reduce the false positives on
> ob.surbl.org, the SURBL list based on Outblaze's URI blacklist:
> 
>   http://www.surbl.org/lists.html#ob
> 
> at the cost of some possibly minor false negatives.
> 
> SpamAssassin has live (weekly?) statistics about the performance
> of their rules, including all SURBL lists, against their ham and
> spam corpora at their Rule QA site:
> 
>   http://ruleqa.spamassassin.org/
> 
> As you can see OB ranks significantly below the other SURBL
> lists, with much higher FP rates around 0.1% compared to 0.01% to
> 0.025% or so.  (Note that the Rule QA site seems to have occasional
> glitches, so if the numbers seem out of range one week, check
> again later.)

I'm not aware of any glitches.  Is it possible that you're seeing the
numbers change based on who or how many people submitted results that week?

> Should we make that change?

You didn't really describe the change, so, sure. :)

Daryl



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