The most common means of transferring viruses to new vulnerable computers is through email. Originally, viruses preferred to invisibly infect innocuous files that were later transferred from computer to computer at the behest of a person sharing files for legitimate purposes. While this can still happen, the overwhelming majority of virus-laden email is sent by autonomous viruses that either have randomly generated recipients or have found recipient addresses on the infected computer. More to the point, these emails generally contain nothing of value. With that change in behavior, the best way to handle emails containing viruses has also changed. In the past, the expectation was that email containing a virus should be modified, the virus stripped out, and the sanitized message delivered to its original destination. These days, infected emails are so rarely legitimate that rather than delivering them, the most common response is simply to delete the infected messages entirely...