How to hide/exclude SPF(sender info) from email, just want to be look "clean"

How to hide/exclude SPF(sender info) from email, just want to be look "clean"

Hello

i have a website, and add form there, and when someone send form, it automatically send to my email at zoho, but......


when i received the email, i see some text after message body

this the E-mail :


From: test
Sent: ‎8/‎14/‎2014 12:04 PM
To: *******
Subject: *******

Message Body:
*******

--

Received-SPF: Neutral ***** is neither permitted nor denied by domain of ******* using best guess ) client-ip: ********
Delivered-To: ********
Return-Path: ********
Received: from *********
with SMTPS id ******** Wed, 13 Aug 2014 22:04:20 -0700 (PDT)
Received: from ******** with esmtp ******
(envelope-from ********)
************
for **********
Received: from *********
To: ********
Subject: *******
*********
X-Priority: 3
X-Mailer: PHPMailer 5.2.7 (https://github.com/PHPMailer/PHPMailer/)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-ZohoMail: ******
X-ZohoMail-Owner: **********
X-ZohoMail-Sender: ******
X-Zoho-Virus-Status: 2




how can i hide this text so it will not show in email.

i reply this email to customer's email but still appear.

i already connect zohomail to my domain, and set dns record. so when my customer send form from my web, it automatically send to my e-mail at zoho.

Thanks