To set-up Abusix Mail Intelligence to work on your Symantec Email Gateway appliance, in the Control Center, go to Reputation -> Bad Senders, ensure that 'Enable Third Party Bad Sender detection' is enabled, click 'Add' and enter <apikey>.combined.mail.abusix.zone.  Make sure the Action is set to 'Reject SMTP Connection' and then click 'Save'.

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