Enabling banned word checking
When you enable banned word checking, your FortiGate unit will examine the email message for words appearing in the banned word list specified in the email filter profile. If the total score of the banned word discovered in the email message exceeds the threshold value set in the email filter profile, your FortiGate unit will treat the message as spam.
When determining the banned word score total for an email message, each banned word score is added once no matter how many times the word appears in the message. Use the command config spamfilter bword to add an email banned word list. Use the command config spamfilter profile to add a banned word list to an email filtering profile.