How to Send Encrypted Email in Gmail
If you use a free Gmail account, your messages have Google’s standard encryption protocol called Transport Layer Security (TLS). TLS only works if the person you’re emailing uses an email provider that also supports TLS, but most major providers use TLS. Assuming mutual TLS compatibility, all messages you send through Gmail are encrypted via TLS. TLS makes it difficult for anyone to intercept your message when it’s en route to the recipient. However, it doesn’t promise to keep messages private between you and the recipient once it reaches them. For example, Google sees messages associated with your account and scans them for potential spam and malicious email, as well as supporting features like Smart Reply. If the person you’re emailing uses a mail server that doesn’t use TLS, your message won’t be encrypted. You probably won’t know, so choose what you send carefully.
How to Encrypt Messages in Gmail for Business
Google for Business, commonly known as GSuite, comes with a variety of encryption options. One of those is S/MIME, an encryption protocol that encrypts emails with user-specific keys, so they remain protected during delivery. They can only be decrypted and read by your intended readers. For S/MIME to work, both you and your recipient must enable it in your GSuite accounts. GSuite automatically encrypts your emails with this method when your account and the destination allow for it.
How to Check If Your Sent Email Will Be Encrypted
How to Check Encryption for a Received Email
There are three colors of encryption lock icons:
Green: Indicates enhanced S/MIME encryption, which is appropriate for most sensitive information and requires the recipient to have the correct key to decrypt the email.Gray: The message is encrypted via TLS.Red: There’s no encryption, indicating the recipient’s email provider doesn’t support encryption.
How to Encrypt Email on Gmail Using Third-Party Options
If you’re looking for more serious encryption than S/MIME or TLS, third-party apps and services like FlowCrypt and Virtru offer solutions to improve the security of Gmail messages.
