Encrypted before it is sent
The sender and subject are encrypted to your account’s key the moment a new mail is detected. What leaves our servers is ciphertext.
Every push notification passes through Apple or Google on its way to your phone. BlueMail encrypts the sender and subject before they leave our servers, so the companies relaying the message cannot read it — and only your device can. Then you decide, per account, how much a glance reveals.
Sender and subject on the lock screen. The default.
You see who wrote. The subject stays in the app.
Only that mail arrived — no sender, no subject.
The sender and subject are encrypted to your account’s key the moment a new mail is detected. What leaves our servers is ciphertext.
Every push on iOS travels through Apple’s APNs, and on Android through Google’s FCM. They deliver the payload without being able to read it — there is nothing legible in it to read.
Your device holds the key and decrypts the notification as it is displayed — on iOS inside the notification service extension, on Android in the app itself.
Turn it on under Settings | Privacy & Security | Advanced Features | Encrypt Notifications, per account. See the full guide.