An email header is simply a snippet of code in an email. This snippet of code contains many things about the email you have received. Some of the information the snippet of code contains is the sender and the recipient. More importantly the it contains the email’s route to get to the inbox along with authentication details. Just to clarify, the email header always precedes the email body.
You may ask yourself why would I care about the email header in my received email. Well it is a good question as to what purpose email headers serve. They provide information about the sender and recipient. For instance, who sent you the email (sender) and of course you (recipient). Another thing the email header provides is preventing spam. For instance, analyzing the information you can decide whether it really was the sender sending the email or just a fake email address. Which takes us to our next point identifying the email route. For instance, if you know the sender is in the US, but analyzing the email route shows more through India, China, Pakistan, you can pretty much know that it is spam.
Most email services, and others frown upon spam associated with email. So in analyzing the email header you can copy the information and send to your email service to report spam. At that point and the more that people do this can lead to less spam from the email service.
To get an email header from Live, Hotmail, or Outlook, first open the email within your web browser. Next, select the Actions drop down arrow and choose "View Message Source".
Once the data window opens (example not shown for security reasons), select Ctrl+A then Ctrl+C on a PC. On a Mac, select Cmd+A then Cmd+C to copy all data within the window.
Once all data is copied, head over to our Email Header Analyzer Tool and paste (Ctrl+v for PC or Cmd+v for Mac) that data into the tool window. Select analyze to get your results.