You can also use S/MIME encryption (Secure/Multipurpose internet Mail Extensions), a widely accepted protocol for sending digitally signed and encrypted messages. To use S/MIME encryption, you and the recipient must have a mail application, such as Outlook, that supports the S/MIME standard.

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

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

Send encrypted email messages in Outlook. Secure messages by using a digital signature. Get a digital ID. Find digital ID or digital ID services. Send a digitally signed or encrypted message for Mac. Advanced Outlook.com security for Microsoft 365 subscribers. Learn about encrypted messages in Outlook.com. Encrypt messages using S/MIME in ...

As part of our message protection efforts, Microsoft has evolved our email encryption solutions to provide a unified sender experience whether you're sending a protected message inside of your organization or outside your organization.

Send an encrypted message using S/MIME in Outlook for Mac. Before you start this procedure, you must first have added a certificate to the keychain on your computer. For information about how to request a digital certificate from a certification authority, see Mac Help. You must also have a copy of each recipient's certificate saved with the ...

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.

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 …

Want to add a padlock to your email messages? You can use S/MIME in Outlook Web App 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.

Encrypt a single message using S/MIME in classic Outlook. In an email message, select Options > Encrypt. Choose the encryption option that has the restrictions you'd like to enforce, such as Do Not Forward. Finish composing your email and then select Send. Encrypt all outgoing messages using S/MIME in classic Outlook