I have a Samsung Galaxy S3 (I know very legacy, but I am waiting for the S7) and when I receive e-mails that have a Digital Signature, I do not see the contents of the e-mail. When I open the e-mail, the body of the e-mail states "Encrypted email" and button that states "Decrypt message." When I click on the Decrypt message button, I receive "Unable to display encrypted message. Certificate not installed.
Any assistance would be most helpful and appreciated.
What are your thoughts?