In previous versions of Outlook, right-clicking on the message and selecting options, you could see the details of the message. This allowed you to see the headers.
In Outlook 2010, this was removed from the pop-up menu. It can easily be added to the Quick Launch toolbar.
Select the File Tab and then Options on the left hand side.
The Options window appears. Select Quick Access Toolbar on the left hand side.
The list on the left are commands in Outlook and the list on the right is the Quick Access toolbar.
In the ‘Choose Commands from’ drop down list, select ‘All Commands’.
All of the commands appear in the left hand column underneath the drop down list.
To get there quicker, select the first item and type m. Scroll down until Message Options is found. You can just scroll down until it is found as well.
Click on it and select the Add Button. This adds the command to the Quick Access toolbar.
This command can be moved up or down by selecting it and using the up or down arrow on the right hand side. A seperator can be added also by finding it in the commands list and adding it to the Quick Access toolbar.
Click Okay to save the toolbar changes or Cancel to dismiss them.
The finished toolbar might look like the following figure.
A message can be selected and then the Message Options can be chosen. A dialog appears with the details of the message with the Internet Headers.
This shows the details of the message. This is useful for checking duplicate messages.