Delivery rules are powerful for filtering spam because they offer more options for processing messages than the antispam components. When using the antispam components, if a message is identified as spam, you can delete it, forward it to an e-mail address, or insert an X- Header . When using delivery rules to process a message, you can choose to Delete, Forward, Move to Mailbox, Copy, or Bounce messages. Delivery rules can be set up at the e-mail domain and user levels.
If a message matches entries in the black lists or fails a verification check, an X-Header is inserted into the message header. Additionally, phrase filtering and statistical filtering can be configured to insert X-Headers. If you want to filter a message with an X-Header, you can set up a rule to search for one of the X-Headers. If a message is trapped by a rule, it is immediately processed according to the action specified in the rule.
Tip: You may want to select the Insert X- Header option and set up a mailbox specifically for spam, so that you can evaluate the messages that are trapped to ensure that no legitimate mail gets caught by mistake.
Example 1: Bouncing spam messages
Example 2: Filtering messages listed in a black list for a specific reason
Example 3: Sending spam to a specific folder in a user™s account
Example 4: Receiving Mailing Lists and Newsletters that are identified as spam
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