Gmail's "Confidential mode" provides a method of sending emails and attachments that will expire and
include passcode protection. Here's how to use it:
1. On your computer, go to Gmail.
2. Click the "Compose" button.
3. In the bottom of the "New Message" window, click on the padlock/clock symbol to turn on
Tip: If you've already turned on "Confidential mode" for an email, go to the bottom of the email, then
4. Set an expiration date (1 day to 5 years) and passcode. These settings impact both the message text and
If you choose "No SMS passcode," recipients who use Gmail will be able to open the message
directly. Recipients who don't use Gmail will be emailed a passcode. Note that Gmail creates and
sends the password, not you.
If you choose "SMS passcode" you will be asked later to enter the recipient's text message phone
number. Note that Gmail creates and sends the password, not you.
5. Click on the "Save" button.
6. Enter the recipient's name, message subject and message. Note that the message subject will not be
concealed in "Confidential mode."
7. Click on the "Send" button. If you previously chose "SMS code," you will be asked to enter the recipient's
text message phone number.
Note: The Gmail phone app also includes "Confidential mode."
Send Secure Message or Document