Hotmail/Live user/computer name in email header?

Posted on 2012-08-29
Last Modified: 2012-08-29
Does the computer name or account user name of the mail sender show to the recipient (when he has the mail in his inbox) when an email is sent from a @live or @hotmail account in a browser?
Question by:watchtower66
    LVL 31

    Accepted Solution

    No. The browser doesn't know that information so hotmail cannot put it into the headers of the outgoing email.

    Here's an example email I sent to myself from my hotmail account. You can see all the information that is available in there.

    The only remotely interesting thing in there is the X-Originating-IP field, which specifies the WAN IP Address of the browser that sent the message.

    Delivered-To: *redacted*
    Received: by with SMTP id k8csp151156lab;
            Wed, 29 Aug 2012 07:37:57 -0700 (PDT)
    Received: by with SMTP id j10mr1362224obm.60.1346251076783;
            Wed, 29 Aug 2012 07:37:56 -0700 (PDT)
    Return-Path: <*redacted*>
    Received: from ( [])
            by with ESMTP id kq10si23082367obb.54.2012.;
            Wed, 29 Aug 2012 07:37:56 -0700 (PDT)
    Received-SPF: pass ( domain of *redacted* designates as permitted sender) client-ip=;
    Authentication-Results:; spf=pass ( domain of *redacted* designates as permitted sender) smtp.mail=*redacted*
    Received: from COL107-W2 ([]) by with Microsoft SMTPSVC(6.0.3790.4675);
    	 Wed, 29 Aug 2012 07:37:28 -0700
    Message-ID: <COL107-W21E9D157061B533F12162A0A00@phx.gbl>
    Return-Path: *redacted*
    Content-Type: multipart/alternative;
    X-Originating-IP: [99.xx.xx.xx]
    From: XXXXXX XXXXXX <*redacted*>
    To: <*redacted*>
    Subject: test
    Date: Wed, 29 Aug 2012 10:37:27 -0400
    Importance: Normal
    MIME-Version: 1.0
    X-OriginalArrivalTime: 29 Aug 2012 14:37:28.0274 (UTC) FILETIME=[D05A5320:01CD85F3]
    Content-Type: text/plain; charset="iso-8859-1"
    Content-Transfer-Encoding: quoted-printable
    test 		 	   		  =
    Content-Type: text/html; charset="iso-8859-1"
    Content-Transfer-Encoding: quoted-printable
    .hmmessage P
    font-size: 10pt=3B
    <body class=3D'hmmessage'><div dir=3D'ltr'>
    test 		 	   		  </div></body>

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    Author Comment

    Thank you for your response. I have checked this as well, are there absolutely no exceptions where the browser does know this information?

    As you show in your codesnippet:

    Received: from COL107-W2 ([]) by with Microsoft SMTPSVC(6.0.3790.4675) Wed, 29 Aug 2012 07:37:28 -0700

    Open in new window

    "COL107-W2" is the servername? I've seen alot of these, also in variations where "COL" is "BLU" or "BAY" for example, is there any difference?

    The computer name is only included when sending mail from a mailclient such as outlook express?

    Is there any way the recipient can find out my computer name or username with data in the header?
    LVL 31

    Expert Comment

    No, the COL107-W2 ([]) server is the HOTMAIL smtp server which is delivering the message on your behalf, it doesn't have anything to do with the computer you are logged in to whilst using Hotmail through a browser.

    It's possible that Exchange server, Outlook etc. could very well keep track of the local computer that sent a message and put some of that info in the header, but that's not the same as browser-based webmail.

    What you see in the snippet above is exactly what the recipient has access to.

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