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ITS Safe Computing

Displaying Full Original Headers for Problem Email Investigation

Full original headers provide information about the path the message took to get to you. They are critical for ITS staff members investigating the origins of an email message. Simple headers (to/from) can be forged, so without the full headers, almost nothing can be done to investigate a problematic email.

Use the instructions below to display full original headers. Forward the problematic email, with full headers included, to abuse@umich.edu.

Here's how to include full original headers using the following email programs:

M+Google Mail or Gmail

  1. Open the message.
  2. Click the down triangle for More next to the Reply arrow at the top of the message.
  3. Select show original.

Hotmail

  1. Right-click the message in the inbox and select View Message Source.

Mail.app (Mac)

  1. Open the message.
  2. Under the View menu, select Message, then Long Header.

Outlook 2011 and older (Mac)

  1. Select the message in the inbox.
  2. Right-click the selected message (if you don't have a two-button mouse, hold down the control key and click on the message).
  3. Select View Source on the menu that appears after the right-click.
  4. A window will open with the full headers.

Outlook 2013 and older (Windows)

  1. Double-click the message to open it in its own window.
  2. Click the File tab, then click Properties.
  3. The Properties dialog box will appear. The headers are shown in the Internet headers box.

Older versions of Outlook

  1. Double-click the message to open it in its own window.
  2. Click the View menu, then select Options.
  3. A Message Options window will open. The headers are shown in the Internet headers box.

Outlook Express or Windows Mail

Windows

  1. Display the message.
  2. Under the File menu, select Properties.
  3. In the Properties window, select the Details tab.

Macintosh

  1. Display the message.
  2. Under the View menu, select Internet Headers.

Pine

  1. Display the message.
  2. Press H.