About: 

HPG utilizes banners in email to help employees identify risks associated with email-based attacks that put themselves and the computer at risk. These banners are dynamic and there may be several prepended to a message at time. Employees should take additional cautions on messages containing banners. 

If a message is received from somebody you have not communicated with before the following banner will be displayed on the message:

Image -shows info banner

Process

1. Use high caution and avoid clicking links or openning files until you are 100% certain they are safe
2. Report suspcious emails immediately