https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6568

           Summary: Evaluate Spamhaus Whitelist
           Product: Spamassassin
           Version: SVN Trunk (Latest Devel Version)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Rules (Eval Tests)
        AssignedTo: [email protected]
        ReportedBy: [email protected]
                CC: [email protected]


http://www.spamhauswhitelist.com/en/usage.html

I've been using these since December 2010.  Very low hit rate.  2 out of 935
hams in March.  1/824 in February.  0/733 in January.  No spam hits in my false
negatives, although I was deleting everything flagged as spam.
Listed IPs (2 were from emails from the same person):

173.10.94.185   RCVD_IN_SWL_INDIV
209.191.158.252 RCVD_IN_SWL_TRANS_TEMP
204.89.241.253  RCVD_IN_SWL_INDIV

"senders vetted to the Spamhaus Whitelist are extremely unlikely to transmit
spam, there is no reason to put any type of spam filter either in front of or
after the whitelist"
So I guess they're saying these should all have a very large negative score. 
Although later it says this is only valid with a DKIM signature.  So maybe
small scores with these rules alone, and large negative scores if these hit in
combination with passing DKIM.  


ifplugin Mail::SpamAssassin::Plugin::DNSEval
header  __RCVD_IN_SWL   eval:check_rbl('swl-firsttrusted', 'swl.spamhaus.org.')
tflags  __RCVD_IN_SWL   nice net

header   RCVD_IN_SWL_INDIV  eval:check_rbl_sub('swl-firsttrusted', '127.0.2.2')
describe RCVD_IN_SWL_INDIV  Sender listed at http://www.spamhauswhitelist.com/,
individual
tflags   RCVD_IN_SWL_INDIV  nice net

header   RCVD_IN_SWL_TRANS  eval:check_rbl_sub('swl-firsttrusted', '127.0.2.3')
describe RCVD_IN_SWL_TRANS  Sender listed at http://www.spamhauswhitelist.com/,
transactional
tflags   RCVD_IN_SWL_TRANS  nice net

header   RCVD_IN_SWL_INDIV_TEMP  eval:check_rbl_sub('swl-firsttrusted',
'127.0.2.102')
describe RCVD_IN_SWL_INDIV_TEMP  Sender listed at
http://www.spamhauswhitelist.com/, individual temporary
tflags   RCVD_IN_SWL_INDIV_TEMP  nice net

header   RCVD_IN_SWL_TRANS_TEMP  eval:check_rbl_sub('swl-firsttrusted',
'127.0.2.103')
describe RCVD_IN_SWL_TRANS_TEMP  Sender listed at
http://www.spamhauswhitelist.com/, transactional temporary
tflags   RCVD_IN_SWL_TRANS_TEMP  nice net

score RCVD_IN_SWL_INDIV 0 -2.3 0 -2.3
score RCVD_IN_SWL_TRANS 0 -5 0 -5
score RCVD_IN_SWL_INDIV_TEMP 0 -0.1 0 -0.1
score RCVD_IN_SWL_TRANS_TEMP 0 -0.1 0 -0.1
endif


Maybe it would be better to do them all as a single rule, since the hit rate is
so low:


header   RCVD_IN_SWL_INDIV  eval:check_rbl('swl-firsttrusted',
'^127\.0\.2\.(?:10)?[23]$')
describe RCVD_IN_SWL_INDIV  Sender listed at http://www.spamhauswhitelist.com/
tflags   RCVD_IN_SWL_INDIV  nice net

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