Blacklist: A spam filter blacklist is an access-control
mechanism that means “allow mail from everybody, except members of the
blacklist.” An email spam filter may keep a blacklist of addresses, any
mail from which would be prevented from reaching its intended
Blocking: Email from only the most egregious of known
spam sites is prevented from entering the system. This mail is discarded
and not stored anywhere.
Scoring: Every incoming message that is not from a whitelisted source is scanned and scored for the existence of spam attributes.
Tagging: Incoming messages that exceed a predetermined
threshold are marked by having a label inserted into the beginning of
the Subject field. The thresholds can be set globally or locally. The
global threshold acts as a default level. The local threshold takes
precedence for that specific account once it has been set.
Quarantining: The process in which a message addressed to you is held in your spam firewall quarantine mailbox.
Whitelist: An email whitelist is a list of senders that
the user defines as trusted whose mail should not be sent to the trash
folder under any circumstances. In a spam filter whitelist, mail from
the listed email addresses, domains, and/or IP address will always be