I am having Email gateweay IronMail as an AntiSpam device . I have configured rule for Image Analysis , threshold set to 1 and action set to qaurantine. I need to confirm that how IronMail calculate which image to block and which to deny ? Some images are allowed inside my network and some are blocked. What is the purpose of threshold in this regard ? How it judge that the picture is porn ?
Waiting for appropriate answer