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[vps-mail] Filtering catch-all's misses
- Subject: [vps-mail] Filtering catch-all's misses
- From: "Jim Smith" <maillists@xxxxxxxxxxxxxxxx>
- Date: Tue, 24 Feb 2004 12:36:38 -0500
I set my email to specify valid email addresses and everything else goes to
the catch-all which is trash (aliased to dev/null). I still get occasional
emails to non-existent email addresses such as from the headers below for
aow@xxxxxxxxxxxxxxxx (which has never been a valid address).
I was told that some crafty spammers can forge the headers to hide which
email address it is going to. So I set a Procmail rule to get rid of all
such spams. It came after my white & black list and gave 2 points to
blarneystone and subtracted 3 points for any of my defined addresses. So
anything with 2 points to blarneystone but nothing else went directly to
spam as shown here:
:0:
* 2^0 ^TOblarneystone\.com
* -3^0 ^TOjimsmith@xxxxxxxxxxxxxxxx
* -3^0 ^TOjsmith@xxxxxxxxxxxxxxxx
...snipped out many more...
* -3^0 ^TOsupport@xxxxxxxxxxxxxxxx
* -3^0 ^TOmaillists@xxxxxxxxxxxxxxxx
$HOME/spam
Now that I'm using Bayes, I'd like to somehow turn this into a SA rule so it
tags each of these as spam (right now it sends them directly to spam folder
without running through Bayes).
So, three questions:
1. Is there a test that can be implemented in SA to find emails with forged
To/CC/BCC fields?
or...
2. Can a Procmail action mark up a header like SA does so I can then send it
thru SA with a SA rule to recognize the mark and tag it with a high score?
or...
3. Is there a way to create a rule in SA (with 30 lines of legit email
addresses) to push up the score for the non-recognized ones?
Below is an example of a set of headers in question.
Thanks for any help.
Jim Smith
========================
From maidawatzkax@xxxxxxxxxx Tue Feb 24 14:29:30 2004
Return-Path: <maidawatzkax@xxxxxxxxxx>
Received: from DSL217-132-165-189.bb.netvision.net.il
(DSL217-132-165-189.bb.netvision.net.il [217.132.165.189]) by
blarneys.securesites.net (8.12.6p3/8.12.6) with SMTP id i1OESAkB053267; Tue,
24 Feb 2004 14:29:14 GMT (envelope-from maidawatzkax@xxxxxxxxxx)
To: aow@xxxxxxxxxxxxxxxx
Subject: Dating Online Today "Date Number"6595524
From: maidawatzkax@xxxxxxxxxx
Reply-to: maidawatzkax@xxxxxxxxxx
X-Mailer: PHP/4.1.2
Date: Mon, 26 Jan 2004 00:24:48 -0500 (EST)
Message-ID: <4507150319003.54DVNULNAT@xxxxxxx>
Content-Type: text/plain
X-ClamAV: clean
X-Spam-Score: 6.5
X-Spam-Flag: YES
X-Spam-Checker-Version: SpamAssassin 2.61 (1.212.2.1-2003-12-09-exp) on
blarneys.securesites.net
X-Spam-Report: * 0.2 NO_REAL_NAME From: does not include a real name * 2.1
BAYES_90 BODY: Bayesian spam probability is 90 to 99% * [score: 0.9790] *
2.6 BLANK_LINES_80_90 BODY: Message body has 80-90% blank lines * 1.5
DATE_IN_PAST_96_XX Date: is 96 hours or more before Received: date * 0.1
CLICK_BELOW Asks you to click below
X-Spam-Status: Yes, hits=6.5 bayes=0.9790 required=4.8 autolearn=no
X-Spam-Level: ******
Status: RO
===========================
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