The email header is a section of code that contains information about where the email came from and how the message reached its destination. Headers will contain the email address of the originator and/or the computer the sender was using.
The Value of a Full Email Header
Here are few reasons it may be necessary to review the headers:
- To investigate possible spoofing and determine the source of the message
- To analyze timestamps along the delivery route and identify the source of any delay
- To test any of the mail servers in the path to see if they are on a blacklist
- To review Spam Assassin score
- To determine if the message was routed through a filtering server prior to arrival
While reviewing email header information may seem very technical, internet investigations are NOT rocket science. If you know what has happened and to whom, the next step is to find out why by reviewing the contents of the email header.
Showing Email Headers in Webmail
- Log into your webmail.
- Open the email message.
- Click the arrow located to the left of the subject in the lower box to expand options.
- Click “Other Options” then “View Source”
View Message Headers in Outlook
- Open a message.
- On the Message tab, in the Options group, click the Dialog Box Laucher Icon image.
- In the Message Options dialog box, the headers appear in the Internet headers box.