A digital certificate provides verification to the recipient that the file came from the user or entity identified as the sender, and that it has not been altered since it was signed. In order to send email or other communication in a way that is secure and validated, you will need to first create a digital signature certificate, import that certificate, and then configure your email client to work with the certificate.

Steps to using a Digital Signature Certificate

To sign up for a certificate, follow the instructions at: How To Request a Digital Certificate
To import your certificate, follow the instructions at: How To Import a Digital Certificate
To ensure your email client is configured to make use of the digital certificate you just imported, refer to the following resources to configure your respective email client:
Close and relaunch your email client

What are Digital Certificates

Who Needs Digital Certificates

People who Need Digital Certificates

What are the requirements for signing email

What makes up a Digital Certificate

Steps to using a Digital Signature Certificate

Browser not supported