Occasionally Workfront support may request an email Header file.
Each email application will have it's own way of getting this file. Here are a few different email application instructions to save the Header.
Open the email message. Go to "View" and select "Message Options" - or Go to "File" -> "Info" -> "Properties".
Choose "Internet Headers"
Open the email message. Click the Reply drop-down in the upper right area
Scroll down and select "Show Original"
Open the message, then click on "View" and select "Message Source".
Open the message (click on it). Click on "Actions" and select "View Full Header".
Go to the message list. Right-click on the message and select "View Message Source".