Hi guys,

I'm facing a problem that I will disclose my personal information (My Local IP, Computer Name) when sending out an email to the recipient (gmail, yahoo or any mail provider).
For better understanding, please find the message details from the recipient below,

Code:
Delivered-To: poon@gmail.com
Received: by 10.64.81.69 with SMTP id y5csp146436iex;
        Mon, 9 Jul 2012 21:37:48 -0700 (PDT)
Received: by 10.68.217.40 with SMTP id ov8mr65210371pbc.131.1341895067278;
        Mon, 09 Jul 2012 21:37:47 -0700 (PDT)
Return-Path: <poon@abc.com>
Received: from mail.abc.com ([117.100.243.2])
        by mx.google.com with ESMTP id vz5si37239999pbc.329.2012.07.09.21.37.44;
        Mon, 09 Jul 2012 21:37:45 -0700 (PDT)
Received-SPF: pass (google.com: domain of poon@abc.com designates 117.100.243.2 as permitted sender) client-ip=117.100.243.2;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of poon@abc.com designates 117.100.243.2 as permitted sender) smtp.mail=poon@abc.com; dkim=pass header.i=@abc.com
Received: from localhost (localhost.localdomain [127.0.0.1])
	by mail.abc.com (Postfix) with ESMTP id 83F417839E
	for <poon@gmail.com>; Tue, 10 Jul 2012 12:37:41 +0800 (MYT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=abc.com;
	s=default; t=1341895061;
	bh=O+TkJEdiSPWk+B+6gJ3IpMWXrskKF+l5YGekJubdz/I=;
	h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type;
	b=Bd8desBn7TqC4kxX4sOtSoRwO3BP6l4jQdjLGSBLBUkqS0agpg3ugpu7vVdItF8Qt
	 WJ8tlKBVOip1689CqTKJo5a4cbXlJShixbSLilKDC44VcUNeU07LZaofQztjr7L08u
	 kHHDspeX2kkzwn2pThof0zP+Njof5BZ0vcrJjN4k=
X-Virus-Scanned: amavisd-new at abc.com
Received: from mail.abc.com ([127.0.0.1])
	by localhost (mail.abc.com [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id xMifsAI18O6G for <poon@gmail.com>;
	Tue, 10 Jul 2012 12:37:40 +0800 (MYT)
Received: from CPU00030 (unknown [10.1.1.53])
	by mail.abc.com (Postfix) with ESMTPA id 89B157839D
	for <poon@gmail.com>; Tue, 10 Jul 2012 12:37:40 +0800 (MYT)
This is the local computer (sender information),
Code:
Received: from CPU00030 (unknown [10.1.1.53])
	by mail.abc.com (Postfix) with ESMTPA id 89B157839D
	for <poon@gmail.com>; Tue, 10 Jul 2012 12:37:40 +0800 (MYT)
May I know, how can I eliminate my sender local pc/client information to the recipient??