[SURBL-Discuss] OB FPs

Jeff Chan jeffc at surbl.org
Tue Sep 28 01:28:06 CEST 2004

On Monday, September 27, 2004, 4:11:16 PM, Patrik Nilsson wrote:
> How many of those that currently get listed have name servers listed in SBL
> at the time they get listed?

I don't have stats currently, but there is certainly overlap.

> If a substantial part do have their name server listed in SBL, have you 
> considered using that type of data as an aid to filter out FPs in real time?

Lack of inclusion in SBL can and probably should be a flag
to check for FPs, but there are spam domains, especially
new ones, that sometimes don't match SBL, for example due
to using a new name server or hosting IP space.

SBL inclusion or non-inclusion is definitely a useful spam
versus ham heuristic however.

Jeff C.
"If it appears in hams, then don't list it."

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