Emails that were considered "high risk" in Fortisandbox, Fortimail is letting it go.

Good day * There are emails that the FORTISANDBOX has classified as high risk, low risk, malicious; However, FORTIMAIL is classifying it as 'Not Spam' or 'Safe System', despite the severity it presents, it is letting it pass. What is the reason that FORTIMAIL has accepted it, despite the severity that FORTISANDBOX classified it? The logs were reviewed and they do not indicate if the email is malicious or high risk. The domains or emails that are included in the "safe list" of FORTIMAIL, are not going to perform any scan analysis? because in the logs it is observed that despite the severity they are letting FORTIMAIL pass.