If you send sensitive or strictly confidential information, then you may also want to encrypt the email to ensure the complete privacy. Click OK to close every open dialog box.If you have several signing certificates, you can choose a proper digital ID by clicking the Settings button.
When you select this option, the verification information will be sent to you in a separate message. Check Request S/MIME receipt for all S/MIME signed messages if you wish to verify that your digitally signed email message has been received unchanged by the intended recipients.
Select Send clear text signed message when sending signed messages if you want the recipients that don't have S/MIME security to be able to read the messages you send.You can select one of the additional options, when applicable:.Switch to the E-mail Security tab and select the Add digital signature to outgoing messages under Encrypted Mail.In your Outlook, open the Trust Center dialog: go to the File tab > Options > Trust Center and click the Trust Center Settings button.
How to digitally sign all emails messages you send in Outlook Click OK to close the dialog and send the email as usual by clicking the Send button.
How to sign a single Outlook email with a digital signature Though, if your digital ID is valid both for email encryption and digital signing (and most of email certificates are), it does not really matter which option you choose, both certificates will get configured anyway. To configure the signing certificate, you perform exactly the same steps with the only difference that you choose to add a Signing certificate instead of Encryption certificate. In the previous article, we also discussed how you can set up the encryption certificate in Outlook.