This example is on spam detection on one of emails detected:

Return-path:
Envelope-to: xxx@xxxx.com
Delivery-date: Mon, 19 Oct 2009 21:16:49 +0800
Received: from svarog.email.starband.net ([148.78.247.55])
by server24.mynehosting.net with esmtps (TLSv1:AES256-SHA:256)
(Exim 4.69)
(envelope-from )
id 1Mzs6M-0004qk-CW
for xxx@xxxx.com; Mon, 19 Oct 2009 21:16:48 +0800
Received: from User (173-15-205-100-BusName-Richmond.hfc.comcastbusiness.net [173.15.205.100])
(authenticated bits=0)
by svarog.email.starband.net (8.13.8/8.14.2) with ESMTP id n9JDGNB3026788;
Mon, 19 Oct 2009 09:16:28 -0400
Message-Id: <200910191316.n9JDGNB3026788@svarog.email.starband.net>
Reply-To:
From: “Mr. Thomas Lang”
Date: Mon, 19 Oct 2009 09:16:17 -0400
MIME-Version: 1.0
Content-Type: text/plain;
charset=”Windows-1251″
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2600.0000
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000
X-Virus-Scanned: ClamAV 0.92.1/9909/Sun Oct 18 18:55:53 2009 on svarog.email.starband.net
X-Virus-Status: Clean
Content-Transfer-Encoding: quoted-printable
X-MIME-Autoconverted: from 8bit to quoted-printable by svarog.email.starband.net id n9JDGNB3026788
X-Spam-Status: Yes, score=13.4
X-Spam-Score: 134
X-Spam-Bar: +++++++++++++
X-Spam-Report: Spam detection software, running on the system “server24.mynehosting.net”, has
identified this incoming email as possible spam. The original message
has been attached to this so you can view it (if it isn’t spam) or label
similar future email. If you have any questions, see
the administrator of that system for details.
Content preview: Dear Friend, My name is Mr. Thomas Lang the owner and Ceo
of TLANG GROUP OF COMPANY LTD in China. I sell my products( Polymeric Polyol
and other products for world trade) to my customers in U.S.A,Canada and Uk
which i find it very difficult in receiving my payments from them in the
past as they have requested to pay through a direct wire transfer into a home
equity line of credit account. I have had a lot of experiences in the past
when they were paying through checks and money orders. [...]
Content analysis details: (13.4 points, 5.0 required)
pts rule name description
—- ———————- ————————————————–
1.6 MISSING_HEADERS Missing To: header
2.7 DEAR_FRIEND BODY: Dear Friend? That’s not very dear!
0.7 MSOE_MID_WRONG_CASE MSOE_MID_WRONG_CASE
2.0 ADVANCE_FEE_2 Appears to be advance fee fraud (Nigerian 419)
2.2 FAKE_REPLY_C FAKE_REPLY_C
4.2 FORGED_MUA_OUTLOOK Forged mail pretending to be from MS Outlook
X-Spam-Flag: YES
Subject: ***SPAM*** Re: Be my company representative in USA for mutual benefit!!

Notice that the email that have been sent to receiver violating the rules (bold one), Spam Assassin will notify us in the email that this email is a possible spam. Change configuration in CPanel either you want to automatically delete the spam or create your own rules.