To revoke an e-mail:
- Select the e-mail you want to revoke.
- Click on the three-dot menu in the email or right-click on your mouse/touchpad and select REVOKE.
- By revoking the e-mail, the recipients will see neither the textual content nor any atttachments, even after the e-mail is opened.
- Recognizable from the icon, the revoked message can be forwarded and modified for a new e-mail.