S/MIME

Secure/Multipurpose Internet Mail Extensions (S/MIME) is an industry-standard that encrypts and digitally signs emails to ensure their integrity and security:

• Encryption: Protects the contents of emails
• Digital signatures: Verifies the sender's identity
• Message integrity: Ensures the email's contents are not altered
• Non-repudiation: Provides a way to prove the origin of the email
• Authentication: Verifies the identities of both the sender and recipient

S/MIME is compatible with most enterprise email clients, including Outlook for iOS and Android. To add or remove a digital signature from a message in Outlook on the web, you can:

• Go to the top of the message
• Select More options > Message options
• Select or deselect Digitally sign this message (S/MIME)