问使用OriginationNumber发布Boto3 SNS短信时出现问题

EN

        try:
            sns = boto3.client('sns',
                               aws_access_key_id='<our api id>',
                               aws_secret_access_key='<our api key>',
                               endpoint_url='https://sns-fips.us-east-2.amazonaws.com',
                               config=Config(region_name='us-east-2',
                                             proxies={'https': '<our proxy>'}))
            for o in users:
                number = getattr(o,'number') if getattr(o,'number').startswith('+') else '+1' + getattr(o,'number').replace("-","").replace("(","").replace(")","")
                print('Sending message ' + msg + ' to contact ' + getattr(o,'name') + ' at number ' + number)
                result = sns.publish(PhoneNumber=number, Message=msg, MessageAttributes={'AWS.MM.SMS.OriginationNumber': {'DataType': 'String', 'StringValue': '+1<our tollfree>'}})
                print(result)
        except Exception as ex:
            print("SMS API EXCEPTION: {0}".format(ex), flush=True)