Note that, due to technical constraints with end-to-end encryption, if you respond to a message sent by the recipient of a Password-protected Email, your response is not end-to-end encrypted by default. However, they can only reply to each email a total of five times. Recipients can reply to Password-protected Emails in a way that is also securely end-to-end encrypted (including attachments). Make sure you use another secure communication channel, like Signal, or just tell them in person. Your intended recipient will need the password to read the message, so share it with them. Before clicking Send, however, click the External encryption button (with the lock icon).Ĥ. Any attachments will also be end-to-end encrypted. You don’t need a Proton Mail account to access this inbox.ġ. This takes them to a secure Proton Mail mailbox where they can read your message and respond using end-to-end encryption. To read the message, they must enter a previously agreed-upon password. With Password-protected Emails, the person you’re writing to receives an email telling them they’ve been sent a secure encrypted message. It’s a way you can send a secure, end-to-end encrypted email to anyone who isn’t on Proton Mail. What is a Password-protected Email?Ī Password-protected Email is an email that requires a password to open it. You can also use PGP encryption if the person you’re writing to uses it. If you want to send a secure, end-to-end encrypted email to someone who isn’t on Proton Mail, the easiest way is to use a Password-protected Email. Emails sent between Proton Mail users are automatically end-to-end encrypted.
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