James Gray writes:
> On Wed, 26 Mar 2008 12:09:47 pm D Hill wrote:
> > Now your confusing the subject. The previous response you made was from:
> >
> >    From: James Gray <[EMAIL PROTECTED]>
> >
> > Now you are using:
> >
> >    From: James Gray <[EMAIL PROTECTED]>
> >
> > BOTH of those domains point to an MX that has a CNAME to:
> >
> >    smtp.mas.viperplatform.net.au
> 
> So I use one mail client and occasionally forget to set the correct profile 
> to 
> send as.. sorry.
> 
> No.  None of the domains have any references to smtp.mas... as an MX record.  
> They all point to mail.mas... and they all have a default TTL of 38400 for 
> the zone.
> 
> Besides, this still doesn't change my original point that SORBS have a habit 
> of listing addresses (justifiably or not) then attempt to extract money to 
> remove the listing.  That's just extortion, not a good RBL.

It's worth noting that SpamAssassin has *never* used the SORBS sublist
that requires this payment.  We do not endorse that "pay-to-remove"
concept.

Also, folks -- regardless of how RFC-anal his DNS records are, that
doesn't change the fact that SORBS DUL is listing his IP space
incorrectly.  This is *definitely* a false positive for SORBS.  So please
stop rattling on about that end of things.


Anyway -- the SORBS DUL sublist is still in SpamAssassin due to its
success at hitting spam with few false positives.  Compare their accuracy
ratings against the nearest analogue, RCVD_IN_PBL:

http://ruleqa.spamassassin.org/20080322-r639965-n/RCVD_IN_SORBS_DUL/detail
http://ruleqa.spamassassin.org/20080322-r639965-n/RCVD_IN_PBL/detail

SPAM%                                    HAM% 
36.2977  488419 of 1345591 messages      0.1094  87 of 79523 messages   
                    0.997        0.91    0.00   RCVD_IN_SORBS_DUL
66.7720  898478 of 1345591 messages      0.1823  145 of 79523 messages          
 
                    0.997        0.87    0.00   RCVD_IN_PBL

that's a 99.7% accuracy rating, and generally hitting on the low-scoring
spam too, which is the most valuable.  Having said that, it has a very
low score; in set3 it provides only 0.91 points.  That's the GA
compensating for its false positives.

Nowadays it's mostly subsumed into PBL:

  overlap spam:  91% of RCVD_IN_SORBS_DUL hits also hit RCVD_IN_PBL;
                49% of RCVD_IN_PBL hits also hit RCVD_IN_SORBS_DUL

so it's likely that the PBL would compensate entirely for the loss
of SORBS DUL, if we were to remove it.  But we don't know.

If you like, open a bug on our bugzilla suggesting that for the next
rescoring run (for 3.3.0), we disable SORBS_DUL and see if accuracy
survives ok, and we will try that out.

--j.

Reply via email to