Unfortunately we need a solution now.
Can you give us instructions how to do this with version 1.6 ?
Michael Hess
First, create the who object "valid user" and change the standard spam rule to analyse just the valid emails and use quarantine. Quarantine is a final action so all spam emails to valid users are sent to the quarantine. Second, accept all emails sent to valid users. Accept is also a final action and not further rules are applied. Third, block the rest. Take care on the priorities.
Based on the standard ruleset:
1. Create a new WHO object "Valid Users", add all valid e-mail addresses
2. Modify the existing rule "Mark Spam": Add the new WHO object to the rule (TO)
Mark Spam rule:
From:Anybody
To:Valid Users
When:Always
What:Spam
Action:Modify Spam Level, Quarantine
3. Add new rule: "Accept valid" (direction in, priority 77)
From:Anybody
To:Valid Users
When:Always
What:Anything
Action:Accept
4. Add new rule: "Block unknown" (direction in, priority 76)
From:Anybody
To:Anybody
When:Always
What:Anything
Action:Block
NOTE: take care and do testing after enabling these settings. Also I suggest to use the new feature in 1.7 when we release it,