What is a digital ID?

A digital ID helps prove the identity of the sender and receiver of an email and can help prevent people from tampering with the message. A digital ID helps protect messages by adding a unique code to the message called a digital signature. This signature helps assure email recipients that the message came from the real sender.

To send a message with your digital signature in Windows Live Mail, get a digital certificate from a certification authority (CA) of your choice. Companies that provide digital certificates include VeriSign, Thawte, and GlobalSign.

Before you can receive a message with a digital signature, you must have the digital ID of the sender in Windows Live Mail. To get the digital ID of the sender, ask the sender to provide it to you.


  • A digital signature is not the same as the signature at the end of a message.

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