Microsoft has topped a list of biggest U.S. spammers for five out of the past 15 months. A University of Texas study to flag the worst offenders in an effort to get them to improve their security. The project analyzes raw data about where spam traffic comes from and tracks down what organization owns the offending IP addresses. One factor in the high volume of Microsoft spam may be that part of it is MSN, the Microsoft portal that includes its ISP. The research could indicate that legal requirements to publicly post data security stats about businesses could drive them to be more secure.”]
Source: https://www.csoonline.com/article/2132008/study–microsoft-repeatedly-ranks-as-top-u-s–spammer.html