This email with the subject "NatWest Secure Message" was received in one of Scamdex's honeypot email accounts on Wed, 09 Sep 2015 15:15:41 -0700 and has been classified as a Generic Scam.
The sender was "NatWest.co.uk" <email@example.com>, although it may have been spoofed.
You have received a secure message. Read your secure message by opening the attachment, SecureMessage.zip. You will be prompted to open (view) the file or save (download) it to your computer. For best results, save the file first, then open it. If you have concerns about the validity of this message, please contact the sender directly. For questions please contact the NatWest Bank Secure Email Help Desk at 0131 556 1400. First time users - will need to register after opening the attachment.About Email Encryption - https://supportcentre.natwest.com/app/answers/detail/a_id/1671/kw/secure%20message