How Many Rbl ??

[Glenn Steen]

On 20/03/2008, Matt Kettler <mkettler at evi-inc.com> wrote:
> Andrea Bazzanini wrote:
>  > Hello Guys..
>  >
>  > Realy esay question ...
>  >
>  > How many RBL ... in your opinion must be check by MS ???
>  >
>  > I have added 5 rbl into my MS config file .... spamcop, spamhouse etc....
>  >
>  > Thanks !!!
>
>
> The answer depends a lot on how bad FPs are for you.
>
>  I trust zero RBLs enough to use for outright blacklisting.
>
>  At the MTA layer, I use 3 RBLs to trigger greylisting. (yes, unlike most
>  greylist configs, I don't greylist by default, but use milter-greylist's access
>  lists to selectively greylist email that's highly likely to be spam). This is
(Aside: I'm meaning to implement this, since it would be OK with the
current Swedish laws.... AICS... and would help... You're not the only
one sitting up and paying attention Matt:-):-))
>  acceptable to me, as the only consequence of false positive is late email.
>
>  At the MailScanner layer, I use 0 RBLs, as I trust no RBL completely.
Actually... If you want a block, but not a reject..... This is where
I'd put the very few (1, perhaps 2)... But only if your spamactions
include "store"... or are only labling as SPAM.

>  At the SpamAssassin layer, I use all the default RBLs. That's acceptable to me
>  because the scoring mechanism makes it very unlikely the RBL will cause a FP, as
>  it would also have to match other spam rules.
>
Same here.

Cheers & Happy Easter!
-- 
-- Glenn
email: glenn < dot > steen < at > gmail < dot > com
work: glenn < dot > steen < at > ap1 < dot > se