How to See Full Email Headers in and Hotmail

In Outlook Mail on the web, you can get access to the full email header information.

Why Examine Email Header Lines?

When you want to trace spam to its source and report the network abuse to the internet service provider, or when you need to to see mailing list commands hidden in header lines, it is important to see the mail's full headers.

By default, shows only a few important headers, but you can make it display all header lines.

See Full Email Headers in Outlook Mail on the Web

To get access to full message headers in Outlook Mail on web (at

  1. Locate the email whose headers you want to examine in the message list.

  2. Click on the message with the right mouse button.

  3. Select View message source from the context menu that has appeared.

    The header lines are all from the very top of the Message source display to the first empty line.

  4. When you are done, click Close.

See Full Email Headers in

To open all email headers for a message in

  1. Open the message whose headers you want to examine in

  2. Click Actions.

  3. Select View message source from the menu that has appeared.

As an alternative, you can also click with the right mouse button on the email in the message list and select View message source from the context menu.

See Full Email Headers in Windows Live Hotmail

To see the full email including all header lines in Windows Live Hotmail:

  1. Open the desired email in Windows Live Hotmail.

  2. Click the down arrow next to Reply in the message's header area near the sender and subject.

  3. Pick View message source from the menu.

What Do Email header Lines Look Like?

An email's header lines can look like the following example. Note the empty line that ends them; "------=_Part_58707437_2076899448.1465826767619" is the first line of the message body.

Authentication-Results:; spf=pass (sender IP is; identity alignment result is pass and alignment mode is relaxed); dkim=pass (identity alignment result is pass and alignment mode is relaxed); x-hmca=pass
X-SID-Result: PASS
X-Message-Status: n:n
X-Message-Delivery: Vj0xLjE7dXM9MDtsPTE7YT0xO0Q9MTtHRD0xO1NDTD0w
X-Message-Info: NhFq/7gR1vTd35DyQzeG5pQU8qjhHQ68PAXgU4HrQUY99i4C6GftcnKZ3DdaWrgomO3vqxBD02cswpP/a7n6mP4hPiKutJnKGsI9zYzHq/xCVDZAzFWs3i4oPs9KHhTzp65Q1jDF10jWCL5U6Q7up7vUr5h/SFAvNKbOkjn706Fed3JiUJre4DCBG8hCjqz+IUEbEQMWaVzlXNNN2Vy/QzTrOHEB7qRQboEMXvMdZrHnrlKbhzGgCQ==
Received: from ([]) by with Microsoft SMTPSVC(7.5.7601.23143);
Mon, 13 Jun 2016 07:07:34 -0700
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; s=mt;;
Received: from ( by id hbqv2c1qqbs7 for ; Mon, 13 Jun 2016 10:06:23 -0400 (envelope-from )
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; t=1465826767;
Date: Mon, 13 Jun 2016 10:06:07 -0400 (EDT)
From: " Email"
Message-ID: <>
Subject:'s 14 Favorite Sites for Sending Summer E-Cards
MIME-Version: 1.0
Content-Type: multipart/alternative;
Precedence: bulk
X-TM-ID: 20160613100607.6927111.278438
List-Unsubscribe: ,
X-rpcampaign: sthbt6927111
X-OriginalArrivalTime: 13 Jun 2016 14:07:34.0723 (UTC) FILETIME=[EF062930:01D1C57C]
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable

(Updated June 2016, tested with Windows Live Hotmail, and Outlook Mail on the web in a desktop browser)