The BlueCrest Verifier application lets you check a potentially malicious email or attachment before opening it.
By downloading the KXZIP file attached to your email and verifying it on the application, you can ensure that the files have not been altered during transmission, obtain information about the author via a digital signature and the date on which the attached file was protected.
The application also lets you view the contents of the email. Only files previously protected by BlueCrest are verifiable.