It reduces exposure, but it isn't airtight
Confidential mode technically blocks forwarding, copying, printing, and downloading, but it cannot prevent someone from simply taking a screenshot of the message on their own screen. For genuinely sensitive information, it's worth treating this as a way to reduce casual sharing rather than an absolute guarantee, and choosing a separate, more secure channel for anything highly confidential.
You can cut off access early, even before it expires
Beyond the expiration date you set when sending, the sender can revoke access at any time afterward from the "Sent" folder by opening the message and selecting "Remove access," which immediately blocks the recipient from viewing it even if the original expiration hasn't been reached yet. That gives you a way to react if you realize after sending that the message shouldn't be accessible anymore.
Frequently Asked Questions
Can confidential mode also prevent someone from taking a screenshot?
Forwarding, copying, downloading, and printing can be blocked technically, but a screenshot of the screen itself can't be fully prevented. Keep that limitation in mind for truly sensitive information.
What happens once the expiration date passes?
Once the expiration date passes, the recipient can no longer view the content even if they open the email, and the sender can also revoke access early at any time using "Remove access" before that date.