Digital Signature on Outlook ( Comodo )

Today a friend of mine had to send an Email and the requirement was for the Email to have a digital signature.
He’s on Windows 10 so we used Outlook and got through it after a couple of tries.
This post is on how to set a digital signature using Outlook.

    • Create a backup of your certificate, and store it in a path you’d like to keep your certificate in and make sure you remember the password too
    • If you want to sign all your mail using your digital signature whenever the recipients also have a signature:
      • From the file menu of your Outlook, click on Options
      • Click on Trust Center
      • Click on Trust Center Settings
      • Click on Email Security
      • Tick the option saying “Add digital signature to all outgoing messages”
      • Tick the option saying “Add digital signature to all outgoing messages”
      • Tick the option saying “Send clear text signed messages when sending signed messages”. This will enable users without a digital signature to be still able to see your messages
      • Tick the option saying “Request S/MIME signed messages”
      • Click on Import/ Export digital ID
      • Import existing digital ID from a file
      • Browse and find the file you’d backed up when you installed the certificate using Firefox, and the password is the one you’d entered while exporting it
      • You’re done!
    • If you only want the current message to be signed and not all messages:
        • Create a new message, and click on options
        • Click on more options
        • Find the security settings, and click on it
        • Tick the option saying “Add digital signature to all outgoing messages”
        • Tick the option saying “Add digital signature to all outgoing messages”
        • Tick the option saying “Send clear text signed messages when sending signed messages”. This will enable users without a digital signature to be still able to see your messages
        • Change settings, and import your certificate here

So from now on, your messages will have a small certificate icon next to them, and on click, they’ll look like the image below.

Comodo Digital Signature

Pretty cool, huh? Anyway, I really don’t know why the university he’s applying to had this as a requirement, but I guess learning things, even as silly as this one, is worth it!

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