How To View Email Header Information

Applies to:
Difficulty Level:


Time Needed:

5 minutes

Tools Needed:

An email client application


This tutorial will show you how to read the full email headers, also known as long headers or internet headers, from an email message in various email clients. An email collects information from each of the computers it passes through on the way to the recipient, and this is stored in the email’s Internet Headers. E-mail headers are helpful in determining the source of e-mail spoofing and phishing and in diagnosing many email problems.

Do NOT simply forward the original message as forwarding will insert new header information.

While we try our best to assist our customers, assistance with third-party software can not be supported completely by Bower Web Solutions. If you have further questions about configuring your specific email application, please visit the company’s website.

How to View Headers Using Webmail

For help on how to login to webmail on Bower Web Solutions’ servers see our tutorial.

Using Horde

  1. Log into Horde Webmail.
  2. Open the email message.
  3. Click the “Message Source” link in the text menu at the top of the message.
  4. A new window with the full message and headers will open.
  5. For more details on accessing email headers in Horde please see this tutorial.

Using SquirrelMail

  1. Open the message you wish to see the headers of by clicking the subject
  2. Open the email message.
  3. Click the ‘View Full Header‘ link under the options section.
  4. You will now see the full headers for the email you selected in step 1.

Nearly all email clients such as Outlook and Mail can display email headers

Nearly all email clients such as Outlook and Mail (for the Mac) can display email header information.

Outlook on a PC

Outlook 365 email headers:

Select the email that you want to show its full message header. Click More actions icon. Select  Other Actions.
Select view message header.

Outlook 2016, 2013 and 2010 email headers:

  1. Select the email message for which you’d like to view the headers.
  2. Click on File
  3. Click on Properties
  4. The new window contains the headers.

Outlook 2007 email headers:

  1. Open Outlook 2007.
  2. Open the email message.
  3. Under the Message tab, in the Options group, click on the Dialog Box Launcher icon.
  4. In the Message Options dialog box, the headers appear in the Internet headers box.

Outlook 2000, 2002 and 2003

  1. Double-click to open the email message in a new window.
  2. Select View > Options from the message’s menu.
  3. All header lines appear under Internet Headers at the bottom of the dialog box.

How to get Email Headers on Apple/Mac Computers

Outlook 2016 for Mac Email Headers

  1. Right-click (or ctrl-click) the message in your Inbox or other folder (do not open the message).
  2. From the menu that appears, select View Source.

 Mail Email Headers

With Mail running, go to the View Menu then choose Message -> Long Headers. Then copy the header and paste it into the body of a NEW e-mail message.

If these instructions are not clear, after you click on the “Mail Icon”, you can click on the “Help” link on the left hand side of the Admin page under the “Help & Support” section for more instructions. Refer specifically to the section labeled, “Setting Up Automatic Reply”.

As programs are constantly being updated, please contact us if you find these instructions are no longer accurate.


  • Email header will change when an email is forwarded. This is why we need to get a copy of the original header information.