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How to Set Email Message Digitally Signed in Outlook 2010-2016

If you want to protect email messages in transit with Outlook, digital sign and encryption are undoubtedly two effective ways to guarantee that only the recipient who has your certificate or private key, could open and read the contents in email message. So have you learned how to do that? If not, follow the article to digitally sign email message in Outlook 2010-2016. Encrypt email message is similar to digitally sign.

In order to specify how to digitally sign the message you want to send, and how to automatically digitally sign all email messages in details, we will talk about them in two parts.

Part 1: Set All Outlook Email Messages Digitally Signed Automatically

Step 1: Run Outlook 2010 as example, and go to File > Options.

choose outlook file options

Step 2: Choose Trust Center tab in “Outlook Options” and click Trust Center Settings.

choose trust center settings in outlook

Step 3: In Trust Center window, select E-mail Security tab, and select following check box under Encrypted e-mail.

select email digital signature option

Step 4: Click Settings to change additional settings, such as choosing certificate to use.

Step 5: Specify the digital ID (digital certificate) to use.

Click Browse next to Signing Certificate in dialog of Change Security Settings, select certificate you can use and it would appear in “Signing Certificate”.

select signing certificate

Step 6: Click OK on each open dialog box to finish.

finish set digitally sign outlook email automatically

From then on, when you send email message in Outlook, the message will be digitally signed automatically.

Part 2: Digitally Sign an Email Message to Send in Outlook

When you are composing an email message, and want to send it with digital signature, you could set this email message digitally signed.

Step 1: In the Message, on the Options tab, in the Permission group, click Sign or Sign Message.

digitally sign outlook email message

Step 2: Compose your message and send it.

send digitally signed outlook email

If you don’t see Sign or Sign Message:

1. In the message, on the Options tab, in the More Options group, click the Options Dialog Box Launcher in the lower corner.

click options dialog box launcher

2. Click Security Settings, and then select the Add digital signature to this message check box.

click security settings in outlook options properties

select add to digital signature to message

3. Click OK, and then click Close.

confirm security settings in outlook

If the “Sign” or “Sign Message” button is not visible, you might not have a digital ID configured to digitally sign messages.

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