Gmail Confidential Mode

• In the Gmail app on iOS or Android: after composing your email, tap the three-dots button. ...
• Tap Confidential Mode.
• Tap Expires in 1 week.
• Set an expiration time, and tap Done.
• Tap Standard.
• Select between SMS passcode delivery or Standard Confidential mode, and tap Done.
• Tap the Check mark.
• Tap Send.