Excerpt From Vb Anti-Spam Comparative Review, June 2017

FortiMail Email Security platform once again received recognition from independent testing house VBSpam, with an impressive 99.98% catch rate. VBSpam provides real-world testing results that measures the effectiveness of blocking with the false positive rate. Only those products that combine a spam catch rate of 99.50% or higher with a lack of false positives earn the VBSpam+ award.