The oikik hosted antispam system is divided into multiple filtering layer that a message passes through prior to being delivered to your inbox. If a message successfully passes through every stage of filters, it gets placed into a delivery queue, and is sent along to your mail server immediately. Each filter stage assigns a score to the incoming message, and based upon the user's filter sensitivity (set in the control panel at the individual or domain level), the cumulative score of the message determines the action that the system takes for that message. After the total score is calculated, emails are placed into three possible categories : 'clean email' - emails which are clean of malware and spam, 'possible spam' - emails which are clean of malware but still might be spammy, 'definitely spam' - blatant malicious spam.