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Enabling Network Spam Detection on SuSE

From: "andrew cooke" <andrew@...>

Date: Mon, 15 Jan 2007 11:34:02 -0300 (CLST)

I was revising my email processing (which uses procmail to combine a
variety of different checks, including DNS lookup, Vaipul's Razor, and
Spam Assassin) and realised that things could be much simpler - these days
(I've been using my procmail script for years) Spam Assassin can include
all the other sites, including those based on URL lookup (URL in the email
message are checked against a database - more reliable than IP checks
because it more directly identifies the sender).

To enable network based checks on SuSE you need to edit
/etc/sysconfig/spamd to remove "-L":

## Path:           Network/Mail/Spamassassin
## Description:    Arguments for the spam daemon
## Type:           string
## Default:        "-d -c -L"
## ServiceRestart: spamd
#
# The arguments passed to spamd.
# See spamd(1) man page.
# Default is "-d -c -L"
SPAMD_ARGS="-d -c"

And then that .procmail needs now for spam checking is:

:0fw
* < 100000
| spamc

:0
* ^X-Spam-Status: Yes
.Trash.spam-assassin/

And here's a typical spam header after processing - you can see that
various DNS and URL blacklists were used [I've had to edit the URLs with
.xxx in the log below as otherwise this email too is blocked...]:

Content analysis details:   (25.6 points, 5.0 required)

 pts rule name              description
---- ----------------------
--------------------------------------------------
 3.6 RATWARE_RCVD_PF        Bulk email fingerprint (Received PF) found 0.3
SUBJ_BUY               Subject line starts with Buy or Buying 1.3
INFO_TLD               URI: Contains an URL in the INFO top-level domain
-2.6 BAYES_00               BODY: Bayesian spam probability is 0 to 1%
                            [score: 0.0000]
 0.4 HTML_30_40             BODY: Message is 30% to 40% HTML
 0.0 HTML_MESSAGE           BODY: HTML included in message
 1.9 DNS_FROM_RFC_BOGUSMX   RBL: Envelope sender in
                            bogusmx.rfc-ignorant.org
 1.6 RCVD_IN_BL_SPAMCOP_NET RBL: Received via a relay in bl.spamcop.net
             [Blocked - see
<http://www.spamcop.net/bl.shtml?208.104.241.246>]
 1.6 URIBL_SBL              Contains an URL listed in the SBL blocklist
                            [URIs: wranyw.com.xxx moully.cd.xxx]
 3.8 URIBL_AB_SURBL         Contains an URL listed in the AB SURBL blocklist
                            [URIs: wranyw.com.xxx wowmojer.com.xxx
dutyrun.info.xxx] [moully.cd.xxx quiok.hk.xxx]
 4.1 URIBL_JP_SURBL         Contains an URL listed in the JP SURBL blocklist
                            [URIs: wranyw.com.xxx wowmojer.com.xxx
dutyrun.info.xxx] [moully.cd.xxx quiok.hk.xxx]
 2.1 URIBL_WS_SURBL         Contains an URL listed in the WS SURBL blocklist
                            [URIs: moully.cd.xxx]
 3.0 URIBL_OB_SURBL         Contains an URL listed in the OB SURBL blocklist
                            [URIs: wranyw.com.xxx]
 4.5 URIBL_SC_SURBL         Contains an URL listed in the SC SURBL blocklist
                            [URIs: wranyw.com.xxx wowmojer.com.xxx
moully.cd.xxx] [quiok.hk.xxx]

Andrew

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