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In email messages, headers contain the addresses of all the computer systems that have relayed a message in between the sender and you. Each computer that forwards the message along its route adds a line of information to the headers. Usually you do not see the full headers, as they can be fairly long and so are not displayed along with the common "From:", "To:", "Subject:", and "Date:" headers. The information provided in the full headers allows you to determine where a message actually came from, and how it got to your computer. This is sometimes necessary because the address you see on the "From:" line can be spoofed, or faked.

Usually this information is important to determine/block spam/phish emails being seen on the network. You can help by sending this information to The information can be forwarded in following ways:-



If you suspect a message to be phishing/spam, please attach it as "Outlook Item" to a mail (as shown in Step 1,2,3 below):

  1. Outlook Item Step 1
  2. Outlook Item Step 2
  3. Outlook Item Step 3



  1. First display the headers (see instructions for commonly used mail clients below), and then copy and paste them into an email message. For help, please contact us at

On this page:

  • Outlook 2010
  • Outlook 2007
  • OWA
  • Outlook 2003
  • Outlook Express, Windows Mail, Windows Live Mail (Windows)
  • Outlook 2011 (Mac OS X)
  • Thunderbird 3.x (Windows, Mac OS X)
  • Mail (Mac OS X)
  • For other application not included above please see MXToolbox

  • Outlook 2010 (Windows): Double-click the message to open it in a new window. Select the File tab, and then click Properties. Then copy all information in "Internet headers:" field.

  • Outlook 2007 (Windows): Double-click the message to open it, and then in the Options group, click the dialog box launcher (small square with an arrow).

  • Outlook Web App (OWA): Double-click the message to open it, and then click the Message Details icon (an envelope with a small document over it).

  • Outlook 2003 (Windows): From the View menu, select Options... . The message headers are at the bottom of the window, in a box labeled "Headers" or "Internet headers".

  • Outlook Express, Windows Mail, or Windows Live Mail (Windows): In the message index, right-click the message, and then select Properties. Click the Details tab.

  • Outlook 2011 (Mac OS X): In your Inbox (or other folder), right-click or control-click the message, and then select View Source.

  • Thunderbird 3.x (Windows, Mac OS X): Click View, select Headers, and then choose All.

  • Mail (Mac OS X): With the message selected, from the View menu, select Message, and then select either All Headers or Long Headers.


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