ZCS Administrator Guide 8.0
ZCS Administrator Guide 8.0
Network Edition

Managing ZCS Configuration > Anti-spam Settings

Anti-spam Settings
ZCS uses SpamAssassin to control spam. SpamAssassin uses predefined rules as well as a Bayes database to score messages. Zimbra evaulates spaminess based on percentage. Messages tagged between 33%-75% are considered spam and delivered to the user’s junk folder. Messages tagged above 75% are not sent to the user and are discarded.
You can change the anti-spam settings from the administration console Global Settings>AS/AV page.
When a message is tagged as spam, the message is delivered to the recipient’s junk folder. Users can view the number of unread messages that are in their junk folder and can open the junk folder to review the messages marked as spam. If you have the anti-spam training filters enabled, when users add or remove messages in the junk folder, their action helps train the spam filter. See Anti-Spam Protection.
RBL (Real time black-hole lists) can be turned on or off in SpamAssassin from the Zimbra CLI. See the section Add RBLs Using the CLI.
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