> I want to use combo filtering with testsfailed to further 
> punish emails that fail two or more of the reliable tests.

Travis,

I do a similar thing for a long time now and I'm very happy with the
following solution:

1.) create a new filter test COMBO-IP4R:
COMBO-IP4R filter C:\IMail\Declude\combo_ip4r.txt x 0 0

2.) In this file write all you're reliable IP4R-Tests. For example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TESTSFAILED     0       CONTAINS        CBL
TESTSFAILED     0       CONTAINS        DSBL
TESTSFAILED     0       CONTAINS        SPAMCOP
TESTSFAILED     0       CONTAINS        XBL-DYNA
...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

3.) Now you can create additional COMBO-Test files. For example
COMBO-IP4R-SNIFFER filter C:\IMail\Declude\combo_ip4r_sniffer.txt       x 0
0

4.) In this file write the points you want to add if one of the IP4R tests
has failed at the same time with SNIFFER

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TESTSFAILED END NOTCONTAINS COMBO-IP4R

TESTSFAILED 30 CONTAINS SNIFFER-TRAVEL
TESTSFAILED 30 CONTAINS SNIFFER-INSUR
TESTSFAILED 30 CONTAINS SNIFFER-AV
TESTSFAILED 30 CONTAINS SNIFFER-MEDIA
TESTSFAILED 30 CONTAINS SNIFFER-SWARE
TESTSFAILED 30 CONTAINS SNIFFER-SNAKE
TESTSFAILED 30 CONTAINS SNIFFER-SCAMS
TESTSFAILED 30 CONTAINS SNIFFER-PORN
TESTSFAILED 30 CONTAINS SNIFFER-MALWARE
TESTSFAILED 30 CONTAINS SNIFFER-INK
TESTSFAILED 10 CONTAINS SNIFFER-RICH
TESTSFAILED 30 CONTAINS SNIFFER-CREDIT
TESTSFAILED 30 CONTAINS SNIFFER-CASINO
TESTSFAILED 30 CONTAINS SNIFFER-OBFUSC
TESTSFAILED 30 CONTAINS SNIFFER-GENERAL
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

As you can see you can also assign different additional points for different
SNIFFER result codes if you've split up SNIFFER in multiple tests for each
result code.

Some additional things you can do

For example write at teh top of the file 2.) something like

COUNTRY END STARTSWITH  us

and there will be no additional points for messages orriginating from the
USA. (maybe this will not have so much sense as in my case where most legit
messages came from Italy, Austria and Germany

So I've also lowered the weight of all IP4R-tests in my global.cfg file to a
very low weight and have set up an additional filter file having at the top
some END-statements for certain countries. Then below are the same
TESTFAILED-lines as in the file 4.) So I can assign relative high weights to
IP4R-tests for messages comming from "foreign" countries and lower weights
for all messages comming from Italy and neighbors.

Tests I've found very usable for COMBO-tests are

CMDSPACE
SNIFFER
INVURIBL
SPAMDOMAINS

Hope this helps
Markus

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