Google just updated Gmail. The update brings several security features like confidential mode, which allows you to add two-factor authentication and / or set expiration dates for individual emails. Phishing alerts are also now highlighted in a much clearer way, with bold red boxes that are harder to overlook.
Here is how to enable the new settings.
Administrators should be able to access this as part of their Early Adopter Program by going to the Admin Console and selecting to allow users to access the new Gmail.
After the admin has turned this on, individual accounts will receive the “Try the new Gmail” option on their accounts under the Settings route.