Internal Domains

You can configure the internal domain list to allow Deep Discovery Email Inspector determine whether a message is inbound or outbound.

If the domain of a sender address is in the internal domain list, Deep Discovery Email Inspector considers messages from the sender as outbound messages. Deep Discovery Email Inspector applies policies based on the message direction.

Note:

If you do not add any entries in the internal domain list, Deep Discovery Email Inspector considers all messages as inbound messages by default.