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Spam filtering involves setting up heuristic and Bayesian tools, plus white listed email address, black listed addresses and addresses excluded from any processing. Spam filtering works for incoming and outgoing messages. Recent experience shows Bayesian filtering to be particularly effective at blocking spam while allowing legitimate mail through.
Spam filtering is available by using the Security > Spam filter... command. This displays the Spam Blocker dialog:
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Spam blocking uses publicly-accessible black lists containing the IP addresses of email servers known as spam sources or open relays or both. When enabled, this function matches the IP addresses of incoming email to the addresses in the black lists. If they match, the messages can be delivered, isolated or deleted. The inbound SMTP session can also be immediately terminated, refusing the email.
Spam blocking is available by using the Security > Spam blocker... command. This displays the Spam Blocker dialog:
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