Encrypt a single message using S/MIME in new Outlook. Before you start this procedure and encrypt emails, you must first Get a digital ID, otherwise known as a digital certificate, and add it to the keychain on your computer.

How do I send an encrypted email message? To send a message with encryption, compose a new message, select the Options ribbon, and then select Encrypt. You can choose Encrypt or Do Not Forward. To remove encryption, select No permission set. Read an encrypted email message using Outlook.com or Microsoft 365

View and reply to an encrypted message in another email service, like Gmail or Yahoo. If you're using Outlook without Microsoft 365, your encrypted message will contain a link in the message body. Select Read the message. Select how you'd like to sign in to read the message.

Outlook provides various encryption options to help keep your messages secure. To learn more about encryption in Outlook, select a link under the version of Outlook you're using. What version of Outlook do I have? Outlook for Windows. Encrypt email messages. Send, view, and reply to encrypted messages in Outlook for PC

Want to add a padlock to your email messages? You can use S/MIME in Outlook on the web to increase the security of messages. A digitally encrypted message can only be opened by recipients who have the correct key. A digital signature assures recipients that the message hasn’t been tampered with.

How do encrypted messages work? Previously, if you wanted to send an encrypted message to someone outside of your organization, you had to install the Office Message Encryption add-in to encrypt your emails.

After you’ve installed the S/MIME control, you can go to the gear menu > S/MIME settings where you will find two options that you can select to digitally encrypt or digitally sign every message you send.

A digital signature on an e-mail message helps the recipient verify that you are the authentic sender and not an impostor. To use digital signatures, both the sender and recipient must have a mail application that supports the same encryption type. Outlook supports two encryption options:

A digital signature attached to an email message offers another layer of security by providing assurance to the recipient that you—not an imposter—signed the contents of the email message. Your digital signature, which includes your certificate and …

A digital ID enables you to send digitally signed messages using Microsoft Outlook. A digital ID—also known as a digital certificate—helps prove your identity and helps prevent message tampering to protect the authenticity of an email message. You also can encrypt messages for greater privacy.