What method should an analytics team use for real-time updates on transactional email metrics to fulfill a legal obligation?

For real-time updates on transactional email metrics to fulfill legal obligations, utilizing data retrieves on the Send Object is the most effective method. This approach allows the analytics team to access and monitor transactional data immediately after sends, ensuring that metrics are captured in a timely manner. The Send Object contains detailed information about each email that is sent, including status, delivery times, engagement metrics, and errors, which are crucial for compliance and legal requirements surrounding email communications.

By leveraging data retrieves from the Send Object, the analytics team can be proactive in tracking important metrics and generating reports or alerts as necessary. This method provides the granularity of data needed for analysis and helps ensure regulatory compliance by maintaining a record of all transactional email activity.

Other options may not provide the same level of immediacy or relevant detail necessary for fulfilling legal obligations. For instance, while platform events API and event notification service offer robust frameworks for event handling and real-time data pushing, they may not directly capture and store the transactional email metrics needed for regulatory purposes. Data view export with every send could lead to data latency, making it less suitable for real-time updates as it involves waiting for scheduled data exports rather than providing immediate access to metrics as they occur.