How can i find Spammer on my server?

Hello,
Tody i received below abuse email , i check the ""Prevent the user 'nobody' from sending out mail to remote addresses ""
but this spammer user still can send these emailsb as nobady !!

How can i find this user on my server?? ..i use /cpanel/linuxs

Thanks for the helps
Javad


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Abuse attached:


Microsoft Mail Internet Headers Version 2.0
Received: from server3.MY_SERVER_COM ([my-server -ip]) by mcp.sileaser.com with Microsoft SMTPSVC(5.0.2195.6713);
Sun, 30 May 2004 01:04:36 -0700
Received: from nobody by server3.MY_SERVER_COM with local (Exim 4.34)
id 1BULJ5-0002rl-6A
for jedyanak@sileaser.com; Sun, 30 May 2004 04:04:35 -0400
To: jedyanak@sileaser.com
Subject: PayPal Account Security Measures
From: PayPal Service Center <service@paypal.com>
Reply-To: service@paypal.com
MIME-Version: 1.0
Content-Type: text/html
Content-Transfer-Encoding: 8bit
Message-Id: <E1BULJ5-0002rl-6A@server3.MY_SERVER_COM>
Date: Sun, 30 May 2004 04:04:35 -0400
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname - server3.MY_SERVER_COM
X-AntiAbuse: Original Domain - sileas.com
X-AntiAbuse: Originator/Caller UID/GID - [99 99] / [47 12]
X-AntiAbuse: Sender Address Domain - paypal.com
X-Source:
X-Source-Args:
X-Source-Dir:
Return-Path: service@paypal.com
X-OriginalArrivalTime: 30 May 2004 08:04:36.0308 (UTC) FILETIME=[BFBD0140:01C4461C]
-----Original Message-----
From: PayPal Service Center [mailtoHow can i find Spammer on my server?ervice@paypal.com]
Sent: Sunday, May 30, 2004 1:05 AM
To: David Jedynak
Subject: PayPal Account Security Measures

 

 

 

 

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