According to the revision, fully 84.3% of emails sent relating to the industry are considered spam. That's more than the global spam rate of 81.3%, and higher than the rate generated by any other industry.
Not only is the auto industries rate the highest, it's growing. In January of this year, the level for the automotive industry was 82.8%. That might not seem like a huge spike, but when you consider how many billion emails spammers send, the number looks a little more impressive.
Other industries are almost as badly off, with spam accounting for more than 80 percent of emails in the financial, chemical and pharmaceutical, education, manufacturing, marketing, public sector, IT and retail industries.