How to Extract Email Header in Thunderbird?
If you wish to view the header of an incoming email, you can always performing the simple steps below:
- Open your Thunderbird software and click on the box on the top right corner (menu button).
 

- Click on Views > Headers. Next, click on All as seen below.
 

- You shall see the email header content starts appearing as seen below:
 

Updated on: 27/02/2019
Thank you!
