[SURBL-Discuss] RE: 6dos data into ds.surbl.org

Jeff Chan jeffc at surbl.org
Tue Jul 20 18:15:33 CEST 2004

On Tuesday, July 20, 2004, 4:59:43 PM, Joseph Burford wrote:
>> Yikes!  I'd say 4 to 5 percent FPs is unworkable for a SURBL....

> I should have clarified that.

> The 4 to 5 percent on close examination is always email that is
> borderline IMHO. It just didn't end up being tagged as spam in the end.
> Compared with a .1 to .5 percent FP on the other surbl lists it still
> isn't that great.

Thanks for the clarification.  Even relative comparisons are
useful however.

> As for being unworkable it depends on your setup. I was tagging DS with
> a low score, one of the great things with SpamAssassin is that you have
> things like Bayes to combat FPs and the end result is the ham gets
> through :)

Ideally we'd like the FP rates to be as low as possible due
to 100% hand checking, or some really bulletproof methodologies.
Part of the goal is to get the FP rates low enough that people
could feel comfortable using SURBLs with an MTA to reject
directly at the application transport level.  (In other words
use SURBLs before SpamAssassin ever sees the message or on a
server with no SA.)  There is currently some MTA support which
people may be using for personal or small company mail, but it
would be nice if the data could be robust enough for use at an
ISP, etc.   We won't get there with data sources that have
relatively many FPs.

Jeff C.

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