What should I do if I receive an email with a red banner? Why did I receive it if it’s considered dangerous?

In most cases, you can simply delete the message and move on. In many YCG Email Protection deployments, your IT staff, security team, or email administrator will configure your mail server to quarantine or delete “red flagged” mail before it reaches your mailbox. In other cases, the mail will still be delivered with the banner telling you to be careful.