hide private network info in out going mail header

Posted on 2011-02-11
Last Modified: 2012-05-11
When I send a mail from my outlook to gmail (to any external domain ) all of my private network information is revealed to internet . I am using exchange 2010 and outlook client is  ol2007.

How can i hide the header part of my mails . Atleast the client mechain name and ip .

This is how my header looks like from gmail (i replaced my original ips and client names)

Received: from ( [])
        by with ESMTPS id 37di489952obi.89.2011.
        (version=TLSv1/SSLv3 cipher=OTHER);
        Fri, 11 Feb 2011 22:34:29 -0800 (PST)
Received-SPF: pass ( domain of designates as permitted sender) client-ip=;
Authentication-Results:; spf=pass ( domain of designates as permitted sender)
Received: from senderPCName ( by ( with
 Microsoft SMTP Server (TLS) id 14.1.570.1; Sat, 12 Feb 2011 06:34:14 +0000
Question by:ivoicenetworks
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LVL 74

Expert Comment

by:Glen Knight
ID: 34877268
You cannot, this is by design to comply with the RFC requirements for the SMTP protocol

Author Comment

ID: 34877282
Dear demazter thanks for your reply !

When i send a mail from owa it shows only mail server ip  but not my pc name and ip . At least i want the same with my outlook.
LVL 74

Accepted Solution

Glen Knight earned 500 total points
ID: 34877298
The reason you see that with OWA is because you are sending it from the Exchange Server.

You cannot hide the header information.

Author Comment

ID: 34877306
Thank you

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