Google announced Gmail’s confidential mode will be launched for all G Suite users on June 25. Gmail confidential mode adds inbuilt information rights management controls which make it possible to revoke sent messages and to add expiration dates to emails. The protected emails do not contain the confidential content but, instead, the recipients will only receive a link to the actual email hosted on Google’s servers. Self-destructing emails can also block printing and forwarding to other users. Google provides detailed instructions to users on how to use the feature and how to send and read confidential messages.
Source: https://www.bleepingcomputer.com/news/google/gmails-confidential-mode-for-g-suite-goes-live-on-june-25/