Chris wrote:
> I decided last week to finally give the short circuit plug-in a try to
> see how much it sped up detection. Its working great on spam:

> but not so well with ham:
>
> Aug  4 14:22:48 localhost spamd[1023]: spamd: result: . -10 -
>
AWL,BAYES_00,DCC_CHECK,DK_POLICY_TESTING,KHOP_RCVD_UNTRUST,RCVD_IN_DNSWL_HI,RCVD_IN_JMF_W,RDNS_NONE,SPF_PASS,UNPARSEABLE_RELAY
scantime=23.1,size=2682,user=chris
>
> the rules I'm using are straight out of the WiKi:

http://wiki.apache.org/spamassassin/ShortcircuitingRuleset , I presume.

>
> Are there any others I can add to the ham rule to speed things up? For
> instance can BAYES_00 be added or would that tend to cause FN's?

A handful, depending how well Bayes has been trained.  BAYES_00 is the
example given in the 60_shortcircuit.cf file in the rules directory,
which you probably want to read.

You could add RCVD_IN_DNSWL_HI which is in your example.  _MED I'd
expect some FNs from.

Have you set up whitelist_from_dkim and whitelist_from_spf rules ?  The
latter could also be used to shortcircuit your example.

(Any authenticated mail going through the same installation could be
shortcircuited with ALL_TRUSTED.  You can also then add some
trusted_networks.)

Yet another possibility is including some codeword above the cut in your
signature, so that replies are detected by a shortcircuited ham rule.

For general incoming mail, there may not be that much shortcircuiting
that can be done - the rules have to be run to decide if something is
spam.  However, I'd quite like to see a shortcircuit plugin that stops
processing more rules as soon as the running total gets to, say, 12 points.

>Can
> another rule be added for spam that contains entries like:

>
> SAGREY, RCVD_IN_BRBL_RELAY, URIBL_BLACK and so forth with my highest
> hitting rules. Would it be written similiar to the SC_NET_HAM rule?

It can, give all those and the corresponding meta rule a priority of say
-400, give the meta rule a score of 20, and shortcircuit SC_NET_SPAM on.
 But I'd guess you'd get FPs: more perhaps with those rules than with
SpamCop (on first trusted relay) and URIBL_(whatever)_SURBL.

HTH

CK

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