Currently, Gmail supports S/MIME for encryption, which works well enough for users with Google Workspace accounts bu

In addition to E2EE emails, which IT admins can make the default for all end users should they wish, Google launched a number of other features for Gmail, including classification labels that will inform users of each email's sensitivity and how they should be dealt with.

Emails sent with Gmail’s end-to-end encryption are extremely secure because only the sender has control over the encryption key, which is stored outside of Google’s infrastructure. Users can click the padlock by the Bcc button and press Turn On under the Additional Encryption’ option to apply it.