If a phone number is in the opt-out list then the message is not sent regardless if there is an override to allow. The phone number override always takes precedent over the country rule mode. For example, if the country rule mode is block and a phone number override rule is always allow then sending to the phone number is allowed. The opposite is also true, if the country rule mode is allow and a phone number override rule is always block then sending to the phone number is not allowed.
