Fiserv Secure Email Notification – 2193855 secure.notification@fiserv.com email with a zip attachment. The attached file contains the encrypted message that you have received. The file is a Windows Executable file: Sha256 Hashes and Malware Anti-Virus Reports. For questions about secure e-mail encryption service, please contact technical support at 888.278.2454. To access from a mobile device, forward this message to mobile@res.f.com to receive a mobile login URL.”]
Source: http://sanesecurity.blogspot.com/2015/03/fiserv-secure-email-notification.html