Overview

• Google began a gradual rollout on September 30 with up to 15 days before the feature appears in domains.
• Senders must toggle the "Additional encryption" option when composing to protect message content on the client.
• Non-Gmail recipients receive a link to a restricted Gmail view and can read and reply after signing in as a guest.
• Workspace recipients see automatic decryption, while organizations can control encryption keys outside Google via Client-side Encryption to support compliance needs such as data sovereignty and HIPAA.
• Email subject lines and addressed recipients are not covered by end-to-end encryption.