public function isEmailAddressPrimaryType($emailID) {

        // Must we accept "primary" email type only?
        if (!Config::get('lasallecrmlistmanagement.listmgmt_emails_in_list_primary_type_only')) {
            return false;
        }

        // "primary" type is #1
        if ($this->getEmailType($emailID) != 1) {
            return false;
        }

        return true;
    }